TD1105-H2O2 pumping hydrogen peroxide detector features imported high-precision electrochemical principle sensor USB interface high-speed data transmission, downloadable print data LCD dot matrix display technology, can display gas type, gas unit, gas concentration value, measurement maximum value, local time, ambient temperature, etc. Support Chinese and English operation interface, switch simple and convenient gas concentration unit PPM, mg/m3 can quickly switch to display the built-in micro-sampling pump. The suction force of the pump has ten adjustable positions. The explosion-proof grade: ExiaIICT4 TD1105-H2O2 pumping hydrogen peroxide detector function monitors the concentration of hydrogen peroxide in the environment or in the confined space and alarms with self-checking function. The zero calibration function makes the gas monitoring more accurate and reliable. It can avoid the trouble of misoperation with temperature and pressure compensation. It can perfectly realize the compensation of gas concentration under different temperature and pressure environment. Two-level sound and light alarm can be set. The alarm point can set the large-capacity lithium polymer rechargeable battery pump sampling method. The pump's suction size is adjustable. The shell is made of high-strength special engineering plastic. It is non-slip, waterproof, dustproof and explosion-proof. TD1105-H2O2 pumped hydrogen peroxide detector for furniture, flooring, wallpaper, paint, gardening, interior decoration and refurbishment, dyes, paper, pharmaceutical, medical, food, antiseptic, fertilizer, resin, adhesives and pesticides, Raw materials, samples, process and breeding plants, waste treatment plants, perm production workshops, biopharmaceuticals, home environmental protection, animal husbandry, greenhouse cultivation, warehousing logistics, brewing fermentation, agricultural production

The reductive bleaching washed well biasing titanate slurry was filtered through a leaf filter, with deionized water (preferably 40-60 deg.] C and containing 0.1% -2.0% of the acidic water) was washed with metatitanic acid, further ferrous sulfate wash until metatitanic Fe 2 0 3 containing less than 30 * 10 -6 qualified. 7. Operation steps, requirements, shortcomings and improvement suggestions for the bleaching of trivalent titanium solution 1. Addition of acid was dissolved in the water jacket qualified heated with stirring enamel Fanyingguo metatitanic acid and water, stirring to adjust the slurry concentration and containing about Ti0 2 300g / L (if made of rutile titanium dioxide, this When adding calcined seeds, then add a certain amount of industrial sulfuric acid, so that the sulfuric acid concentration of the slurry is between 40-50g / L, steam heated to 50-55 ° C, so that the high-iron hydroxide is dissolved into high-speed iron sulfate Solution. 2. Reduction According to Ti0 2 , add 0.4%-1.0% of trivalent titanium solution as reducing agent, continue stirring, continue heating, keep the temperature at 50-55 ° C for 1 h, and let all the high-sulfur sulfate reduce to ferrous sulfate. Sampling and measuring the trivalent titanium concentration (in terms of Ti0 2 ) in the slurry is 0.3-0.5 g/L, and cooling to 40 ° C or lower can be washed with water. When using a trivalent titanium solution, the solid impurities must be filtered out to ensure the quality of the bleaching. At the same time, the trivalent titanium ions are easily oxidized in the air, so when bleaching, the temperature of the slurry should not be too high, and the stirring during the heat preservation should not be too fast. 3. Washing will reduce the bleac

First, the reason for bleaching partial titanate role and production of rutile titanium dioxide pigment must be bleached Traces of iron impurities in metatitanic acid after washing are in the form of solid ferric hydroxide, and the content of Fe 2 0 3 is more than 0.009%. For the production of titanium dioxide for coatings, it will seriously affect the whiteness of titanium dioxide. After being bleached, the Fe 2 O 3 content can be reduced to less than 0.003%, and the harmful impurities such as chromium , copper and vanadium adsorbed in the metatitanic acid can be removed, so that the prepared whiteness and gloss of the finished product are remarkable. improve. Because trace iron in metatitanic acid is calcined at high temperature, red Fe 2 0 3 is formed , and Fe 2 0 3 has the same crystal structure as rutile titanium dioxide, and is often mixed with eutectic crystal lattice in the same crystal mixture. The lattice deformation is caused, so that the influence of rutile titanium dioxide on iron impurities is much more sensitive than the effect of anatase titanium dioxide on iron impurities. When the Fe 2 O 3content is 0.003%, the rutile titanium dioxide has been rendered yellow; and the Fe 2 0 3 content is 0.009%, which begins to affect the whiteness of the anatase titanium dioxide. The influence of iron impurities is not only the red color of Fe 2 0 3 itself, but more importantly, Fe 2 0 3 enters the Ti0 2lattice, causing lattice defects and forming a color activation point, thereby improving the light absorptio

Abstract: A gas chromatography area normalization method for the determination of γ-linolenic acid and di-high γ-linolenic acid was established. Γ-linolenic acid and di-high γ-linolenic acid are completely consistent in sample processing and chromatographic conditions, only the peak time is different. The precision, reproducibility, recovery experiments, γ-linolenic acid RSD are respectively For 1.51, 1, 89%, and 0.98%, the two high gamma-linolenic RSDs were 1.45, 1.15%, and 0.81, respectively. Correlation analysis r values reached extremely significant levels. The area normalization method for the determination of γ-linolenic acid and di-high γ-linolenic acid can achieve the purpose of simplicity, accuracy, rapidity and small error. Key words: γ-linolenic acid; di-high γ-linolenic acid; gas chromatography CLC number: O 657.71 Document code: A Article ID: 1672-5425(2005)011005O-O3 Synthetic prostaglandin E (Prostaglamdi E) is a precursor of linolenic acid isolated from evening primrose oil [1]. Γ-linolenic acid is synthesized by a reduction reaction, a sulfonation reaction, a carbonation reaction, a hydrolysis reaction, and the like, and then biosynthesized prostaglandin E. High-purity γ-linolenic acid can synthesize di-high γ-linolenic acid, so it is necessary to establish a rapid and simple method for the determination of γ-linolenic acid and di-high γ-linolenic acid to ensure quality control. At present, the domestic determination of γ-linolenic acid is mostly by gas chromatography external standard or internal standard method [2]. For the detection of di-high γ-linolenic acid, infrared spectroscopy has been reported [1]. The author established the experiment by gas chromatography. The area normalization method is used to calculate γ-linolenic acid and di-high γ-linolenic acid. l experiment 1.1 Instruments and reagents: Nanjing Kejie An

First, the partial separation of the mother liquor titanate The hydrolyzate is cooled in a cooling tank by coil water to about 40 ° C, that is, it is sent to the upper tank, the leaf filter is turned on to the vacuum line, and the entire set of blades is immersed in the metatitanic acid slurry. The vacuum leaf filter consists of 10-15 blades each arranged in parallel. Each blade is covered with a filter cloth. Before the top sheet is opened, the bottom mixer or compressed air is started to stir the slurry evenly. Due to the pressure difference of the vacuum, the filtrate gradually permeates the filter cloth, and the metatitanic acid is deposited on the surface of the blade. As the slurry continues to be applied, the liquid level in the tank decreases accordingly, and the titanic acid slurry needs to be continuously added to maintain the liquid level. height. When the titanate filter cake is deposited to a thickness of 25 to 35 mm, the entire set of blades is lifted by an electric crane, and after being slightly drained, the water is washed in a water washing tank. At this time, more than half of the mother liquor in the metatitanic acid has been separated. The mother liquor is pumped into the aspiration tank and automatically discharged. The mother liquor in the previous period is called concentrated acid, and is recycled to the acid hydrolysis process; the mother liquor washed once to the settling tank to recover a small amount of suspended metatitanic acid in the diluted acid. Second, the purpose and operation of partial titanic acid washing The purpose of the water washing is to perform liquid-solid separation using water insolubility of metatitanic acid and water solubility of impurity ions, thereby removing a large amount of non-titanium soluble impurities and free sulfuric acid in the mother liquid other than metatitanic acid, thereby obtaining relatively pu

On November 8, China's liquid chemical trading network, which has received much attention from the industry, was formally operational in Zhenhai, Ningbo. The opening of this website indicates that China's liquid chemical transaction has ushered in the era of e-commerce. After extensive and in-depth market research and multiple argumentations, China Liquid Chemicals Trading Network has designed a variety of transaction modes such as forward transactions, order transactions, and bills of lading transactions. The internet-based trading market is connected with the physical market, designated settlement banks supervise the settlement funds, and joint storage and transportation companies provide supporting logistics services so that the trading market can truly provide integrated services such as transaction, settlement, logistics, and information for companies in the industry. The participation of banks in the supervision of account funds in the bulk raw materials electronic trading market opened a precedent for China`s bulk commodity electronic trading market. At the same time, it learned lessons from the difficulties of real trading in the open online trading market, not simply relying on social credit and information communication. The open online liquid chemical market was changed to a closed one and a membership-based management model was adopted. It is reported that China Liquid Chemical Trading Network is currently based in Ningbo, and joins chemical trading markets in Shanghai, Jiangsu and other places. It plans to gradually form a national liquid chemical price center, logistics center, and information center in one to two years; In five years, we will gradually unite with other regional markets across the country, and will be closely linked in all directions such as logistics, storage and transportation, quality inspection, and banking finance. We will establish a foothold in the field of cash flow, covering the

Guide: Since the beginning of the 21st century, pulp and paper equipment has flourished, and new processes and new equipment have continued. With the increasing complexity of pulp and paper equipment worldwide, the use of auxiliaries to solve the paper industry's production problems has become more common, and paper chemicals have gradually become the third important pulp and paper raw material after fiber raw materials and minerals. At present, the application of papermaking chemicals involves all aspects of the pulp and papermaking process, with a wide variety of products, a wide range of applications, a large impact of the process, and a high degree of attention. Since the beginning of the 21st century, pulp and paper equipment has flourished, and new processes and new equipment have continued. Technological advances have not only improved and improved production efficiency and paper quality, but also placed higher demands on chemical applications. The papermaking chemicals market has broad prospects. I. Industry Overview Fine chemicals for papermaking refer to a large class of chemical products that are finely processed according to the special needs of the paper industry and have corresponding professional supporting application technologies. A new fine chemical industry has been formed in China. Fine chemical products, also known as fine chemicals or special chemicals, are deep processing of basic chemical products, chemical products with special functions or end-use properties. Fine chemical products are widely used in various industries of the national economy. In China, after entering the new century, the industry has divided fine chemicals into traditional fine chemicals (dyes, pigments, additives, coatings, pesticides, etc.) and new fields of fine chemicals (feed additives, food additives, industrial surfactants, medicine

Enhanced oxidizing ability - acid or slightly acid If nitric acid is added to the leachate, oxidation is completed by it, and the reduced nitric acid forms nitric oxide NO gas. In the gas phase, NO is oxidized by oxygen to NO 2 and redissolved in the solution to form nitric acid. Nitric acid becomes an electron carrier. The dissolved oxygen is only on the order of mg/L , and the concentration of nitric acid added can be very high, so their diffusion or reaction rate is much faster than the direct participation of dissolved oxygen in the reaction. Their oxidative regeneration is a homogeneous reaction, and the speed is generally fast. The electron carrier can significantly increase the reaction rate and does not consume itself, so it can be called an " oxidation catalyst " . 1984 Sunshine Mining Company (Sunshine Mining) mixing the sulfuric nitric acid leach agent for the production, handling Hui a silver-copper-containing ore, the copper-containing intermediate product silvery produced after leaching off tetrahedrite antimony. They use a discontinuous leaching method, starting temperatur

Over the past decade, including new GMP regulations, there has been an increasing demand for disinfection and sterilization inside freeze dryers. Many methods of sterilization and sterilization have been applied to freeze dryers, each with its own unique advantages and disadvantages, including: Alcohol formaldehyde ethylene oxide radiation ultraviolet steam hydrogen peroxide The most common method at present is steam sterilization, which is to increase the temperature and humidity inside the lyophilizer to 121 degrees Celsius and 25 PSI, and maintain a certain time and cycle, although the use of steam sterilization is no problem for the factory, but significant The installation cost and complexity of the lyophilizer are increased and a long cycle time is required. The lyophilizer is usually operated under extremely low temperature and high vacuum conditions, and does not require a pressure level. In order to meet the requirements of autoclaving, the cabin must be used as a pressure vessel to significantly increase the production cost, often doubled. The degree requires both an auxiliary steam generator and a stainless steel piping system. Because of the significant increase in steam sterilization costs, and the existing lyophilizers cannot be retrofitted to steam sterilization, the use of hydrogen peroxide vapor is another viable option. How does H2O2 disinfection work? Hydrogen peroxide H2O2 is a recognized sterilant, and hydrogen peroxide vapor HPV residue-free sterilization technology has been in use for over a decade. More than 85% of aseptic process isolators worldwide use HPV technology as a biodecontamination Choice (ISPE, 2005), in addition to the sterilizing of freeze dryers, HPV has been widely used in isolators, rooms, RABS, filling lines and operating/production areas of different configurations. This

Benzoic acid and its sodium salt. Benzoic acid, also known as benzoic acid, has good antiseptic effect and is harmless to the human body. The solubility of benzoic acid in water is small, so the sodium salt C6H5COONa is often used. Sodium benzoate is white crystal and is easily soluble in water and alcohol. In China, it is allowed to use in foods such as soy sauce, pickles, fruit juice, jam, agarose, soda, candied fruit, and noodle sauce. The maximum amount used is (0.2 to 1) g/kg depending on the type of food. Benzoic acid and its salts are acidic preservatives, and the lower the pH of the food, the better the effect. Benzoic acid and sodium benzoate are suitable for pH below 4.5 to 5, pH=3 has the strongest inhibitory effect on bacteria and weaker inhibition on yeast and mold. Benzoic acid does not accumulate in the human body and is completely excreted from the urine. The daily intake of the human body is 5 mg/kg (body weight).

RF cable can be customized for other specifications AVX tantalum capacitor TAJB106K016RNJ stock Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM In the chemical industry, sulfuric acid is already a necessity and catalyst for everyday plants. The concentration of sulfuric acid is the standard for controlling the quality of a product, so we must always check the concentration of sulfuric acid. Nowadays, there are many methods for detecting the concentration of sulfuric acid, but most companies use the principle of metathesis, and then use titration, the concentration can be calculated according to the amount of the substance of the reactant, and the amount of sulfuric acid is calculated according to the titration, and the quality is converted. Then calculate the quality score. Most of these methods are cumbersome, reproducible, and the workload is large. Concentration of sulfuric acid solution Conductivity Many physical quantities, such as refractive index, are relat

Hydrogen peroxide is an excellent bleaching agent, which oxidizes and bleaches cellulose fibers by oxidation. It has pure whiteness, good stability and no pollution, and has no corrosive effect on equipment. Therefore, hydrogen peroxide bleaching is widely used in the textile printing and dyeing industry. When bleaching with hydrogen peroxide, a certain amount of stabilizer must be added to the bleaching liquid to control the decomposition rate of hydrogen peroxide, so that it can be uniformly and effectively decomposed to avoid severe damage to the fabric. There is a lot of debate about the hydrogen peroxide bleaching mechanism, but it is generally accepted by Peter Ney of Germany that the substance that causes the fabric to bleach is hydrogen peroxide ion (H00-), which is mainly caused by oxidation of cellulose. Hydrogen radical (H00·). For this reason, HOO· is suppressed during the bleaching process of the fabric, and HOO- is stabilized to prevent oxidation of the cellulose, and a good oxygen bleaching effect is obtained. In actual production, the decomposition of hydrogen peroxide is affected by three factors: temperature, pH, and heavy metal ions. Hydrogen peroxide stabilizers can be divided into silicon-containing and non-silicon-based chemical components; they can be classified into two types: adsorption type and chelation type. The most typical adsorbent stabilizer is water glass. Water glass is a network type lattice structure colloid. It swells into a sponge-like colloid in water and has a large specific surface area. It has strong adsorption capacity, can adsorb Fe2+ and block HO-, so that Fe2+ does not undergo catalytic reaction. Inhibits the formation and decomposition of H00·free radicals. The water glass can combine with Ca2+ and Mg2+ ions in the bleaching liquid to form a highly dispersed magnesium silicate and calcium silicate colloid, which is adsor

Guide: Since the beginning of the 21st century, pulp and paper equipment has flourished, and new processes and new equipment have continued. Technological advances have not only improved and improved production efficiency and paper quality, but also placed higher demands on chemical applications. The papermaking chemicals market has broad prospects. With the increasing complexity of pulp and paper equipment worldwide, the use of auxiliaries to solve the paper industry's production problems has become more common, and paper chemicals have gradually become the third important pulp and paper raw material after fiber raw materials and minerals. At present, the application of papermaking chemicals involves all aspects of the pulp and papermaking process, with a wide variety of products, a wide range of applications, a large impact of the process, and a high degree of attention. Since the beginning of the 21st century, pulp and paper equipment has flourished, and new processes and new equipment have continued. Technological advances have not only improved and improved production efficiency and paper quality, but also placed higher demands on chemical applications. The papermaking chemicals market has broad prospects. I. Industry Overview Fine chemicals for papermaking refer to a large class of chemical products that are finely processed according to the special needs of the paper industry and have corresponding professional supporting application technologies. A new fine chemical industry has been formed in China. Fine chemical products, also known as fine chemicals or special chemicals, are deep processing of basic chemical products, chemical products with special functions or end-use properties. Fine chemical products are widely used in various industries of the national economy. In China, after entering the new century, the industry has divided fine chemicals into traditional f

In addition to leaching gold with nitric acid/sodium chloride, nitric acid oxidation is generally used for pretreatment. The Nitrox process and the Areno process for gold and silver concentrates are a step of oxidative pretreatment with nitric acid, which converts sulfides into oxides, making gold and silver suitable for use in certain methods (eg sulfur vein method). Or cyanide method) to extract. The Nitrox method uses atmospheric air, while the Ar-seno method uses pressurized oxygen. The Nitrox method is a nitric acid cycle, while the Arseno method controls the reaction with nitrous acid. The oxidation rate is faster than that of nitric acid. However, during the oxidation process, arsenic forms arsenite instead of arsenate and elemental sulfur is formed. Elemental sulfur is cyanated for the next step. Leaching gold is not good. In order to overcome the problems caused by the formation of elemental sulfur, a method (Redox method) which is carried out at a high temperature has recently been reported, which is characterized in that limestone is added to the reactor to remove various sulfates, and iron arsenate is precipitated to avoid generation. The trouble with elemental sulfur. The extraction of copper , uranium , platinum , nickel , cobalt and silver with nitric acid has been completed. All of this work involves the dissolution of the element under study and its subsequent separation from other elements of dissolution. Since gold is not dissolved by nitric acid and is mixed with other acid insolubles, the nitric acid treatment of gold ore and concentrate is different from the above. Gold in refractory ores and concen

To extract acetic acid from water, our water quality conditions are as follows: treatment volume 2t / h, acetic acid 3wt%, ph ~ 3 or so we design the use of extraction to recover acetic acid. After extracting acetic acid, we design and reuse distillation to recover 1-10wt% of methanol in water. I would like to ask about the cost of the equipment and the efficiency that can be achieved under this throughput. What equipment is good for extracting acetic acid from water? A centrifugal extractor can be used. Zhengzhou Tianyi extracts the new CWL model, which is more suitable for acetic acid extraction. High extraction efficiency, low required number of stages, low power consumption, and savings in extractants are all reasons to choose. Centrifugal extraction machine process for acetic acid extraction: A wastewater purification method that separates and extracts contaminants by using different extraction ratios of contaminants in water and solvent, using an extracting agent that is incompatible with water but capable of dissolving pollutants, and is thoroughly mixed with the wastewater. The extractant containing the extract is subjected to back extraction using a stripping agent to recover the useful substance, and the extractant is regenerated and reused. Processing equipment price of 2t / h processing cost: The processing capacity is 2t/h, and the CWL250-M centrifugal extracting machine can be selected. The processing capacity of the equipment is 3 cubic meters per hour, and the processing volume of 2 cubic meters per hour is very suitable. The price of this model is around 80,000, and the detailed price and cost depends on the specific material selection. Extraction equipment size for acetic acid extraction: The size of the CWL250-M

Nine, titanium factors influence the biasing effect of acid washing There are many factors affecting the vacuum filtration and water washing effect of metatitanic acid, which are also complicated and often cross together. Here, it is only a single factor. 1. Vacuum The pressure difference between the two sides of the filter medium is the degree of vacuum. Under the condition that the vacuum line is not leaking, the vacuum degree of filtration is determined by the resistance of the filter cake and the filter medium, except for the capacity of the vacuum pump. The filtration of metatitanic acid is generally 6.67*10 4 -8. 67*10 4 The vacuum of Pa is more suitable. When the degree of vacuum is too low, the washing time is long, and it is easy to cause a falling film accident; if the degree of vacuum is too high, cracks are easily generated on the surface of the filter cake, so that the washing water is short-circuited from the crack to reduce the washing efficiency. 2. Partial titanic acid particle size Filtration requires that the particle size of metatitanic acid should be even and moderate. The particles are coarse, the water flow is fast, and the washing is easy, but the particles are too thick, the water flow speed is too fast, the pipe resistance is increased, and the inside of the particles is not easy to be washed; the particles are too fine, the filtration and filtration are large, or the filter holes are blocked, which makes the washing difficult and affects the yield. 3. The water temperature of washing water removal process is mainly free sulfuric acid and ferrous sulfate. The solubility of ferrous sulfate in water increases with increasing temperature over a range of temperatures. Therefore, increasing the water temperature is beneficial to water washing, shortening the washing time, reducing the iron content of

Sulfuric acid is widely used in chemical and steel industries. In many production processes, the utilization of sulfuric acid is low, and a large amount of sulfuric acid is discharged along with the acid-containing wastewater. If these wastewaters are discharged into the environment without being treated, they will not only acidify the water body or the soil, but also cause harm to the ecological environment and waste a lot of resources. In recent years, many countries have already established strict emission standards. At the same time, advanced governance technologies have also developed rapidly around the world. Spent sulfuric acid and sulfuric acid wastewater contain not only acidity but also a large amount of impurities. According to the differences in waste acid, waste water composition and treatment objectives, the governance methods adopted at home and abroad can be roughly divided into three categories: recycling, comprehensive utilization and neutralization treatment. 1 Reuse of waste sulfuric acid Sulfuric acid in waste sulfuric acid concentration is higher, can be recycled after treatment. The treatment is mainly to remove the impurities in the waste sulfuric acid while enriching the sulfuric acid. Treatment methods include concentration, oxidation, extraction, and crystallization. 1.1 Concentration method The method is to heat and concentrate the waste dilute sulfuric acid so that the organics therein undergo oxidation, polymerization, etc., and change into a dark colloidal substance or suspended matter, which is filtered and removed, so as to achieve the dual purposes of removing impurities and concentrating dilute sulfuric acid. This type of method is widely used and mature. On the basis of the general application of the high-temperature concentration method, a more advanced low-temperature concentration method has been developed, which is described below. 1.1.1 high t

1. Preparation of Solution Hydrogen peroxide solution was mixed with water in a ratio of 1:4 and made into a 20% to 25% aqueous solution of hydrogen peroxide with sufficient stirring. 2. Soaking time The prepared hydrogen peroxide aqueous solution is contained in a container, and when poured into the seed, it should be inverted while stirring with a wooden stick so that the seeds can uniformly absorb water. When the temperature is lower than 20°C, the soaking time needs 100-120 minutes; when the temperature is higher than 20°C and lower than 30°C, the soaking time is 60-90 minutes; when the temperature is higher than 30°C, the soaking time is 30-50 minutes. can. 3. Seed germination After soaking the seeds, remove the seeds from the aqueous hydrogen peroxide solution and rinse with water 3 to 4 times (draw the edge and filter the water). After filtering the water, collect it in the container and cover it with a damp cloth. If the seed matures moderately and satisfactorily, generally more than 85% of the seeds germinate within 5 to 6 days, and seedlings can be seeded 2 to 3 days after sowing, which is 6 to 8 days earlier than conventional sowing. 4. Notes One is that before soaking in aqueous hydrogen peroxide solution, the remaining or purchased spinach seeds should be sun-dried in the sunny sun for 4 to 6 hours, and the impurities and insufficient seeds should be removed; the second is to use 100% Bacterial-rinsing water solution is used to sterilize the seeds that have been soaked and germinated; thirdly, the seeds after soaking and germination sterilization should be sowed in time; the soil in Daejeon (greenhouse) is required to be moist; and the fourth one is that after sowing, the cover soil is 1 to 1.5 cm and pressurized. The soil and seeds were matched and covered with straw curtains. When 10% to 15% of the seedlings were unearthed, they were opened. Disclaimer: Some articles in this website have be

A Xinnuo Mining Company Arseno process is successfully developed a low temperature and pressure oxidation leaching technology, simply carried out at 100 deg.] C and 700 kPa oxygen pressure leaching of sulfide can not make full decomposition 15min. Therefore, it is easy to promote the application in industrial production. The Arseno process is another variant of the nitric acid oxidation process. The leaching process plays a major role in nitrous acid rather than nitric acid. The corresponding equilibrium is: 2N0 2 +H 2 0 ==== HNO 2 +HN0 3 3HN0 2 ==== HN0 3 +2N0+H 2 0 Since the oxidation rate is fast and the leaching time is short, a large amount of precipitate is not formed. All of the iron , arsenic and sulphate are in solution, which enriches the gold and is advantageous for subsequent cyanidation leaching. The slurry is discharged from the reactor into a gas separator to recover the gas generated during the reaction. This gas can be returned to the reactor as a raw material for the catalyst. It has been determined that more than 99% of the nitrate reagent can still be recycled to the process for recycling. The nitrate concentration in the solution varies between 0.2 and 3 mol/L. The slurry discharged from the gas separator is a solid residue containing gold and a solution containing soluble iron, sulfur and arsenic. This solution can be neutralized by the addition of limestone and lime when processing the ore. Calcium and rock can reach a neutralization rate of about 80%, and then lime is used to achieve complete neutralization. The neutralized pulp may be recovered by a conventional method such as a carbon slurry method. When the concentrate is treated in this way, the slurry discharged from the gas sepa

Galena three acidic ferric chloride leaching of a saturated saline, and generating elemental sulfur dichloride, lead, lead dichloride salt was dissolved in hot water and filtered while hot, cooling the filtrate to obtain crystals of lead dichloride; two then lead chloride molten salt electrolysis to obtain the metal lead and chlorine; chlorine oxide to ferric chloride, ferric chloride to make it into, recycling. The main reactions are as follows: Leaching: PbS+2FeC1 3 ==== PbCl 2 +2FeCl 2 +S o Electrolysis: Negative electrode: PbCl 2 +2e ==== Pb ↓ +2Cl - Positive electrode: 2Cl - -2e ==== Cl 2 Regeneration: 2FeC1 2 +Cl 2 ==== 2FeC1 3 MM Wong reported in 1980 the details of the galena-lead ferric chloride leaching-lead dichloride-salt electrolysis expansion test conducted by the Renault Metallurgical Research Center of the US Bureau of Mines [1] . Concentrate 50kg, intermittent operation, the leaching tank is a steel drum with a polyvinyl chloride lining and a titanium heating tube, the volume is 1.5m 3 . The leachate contained 73 g/L of FeC1 3 , 254 g/L of NaCl, and pH=3. The temperature is about 100 ° C, the reaction is 30 min, the lead leaching rate is 98%, the copper and silver leaching rate is 80%, and the zinc leaching rate is about 70%. The inner wall of the electrolytic cell is made of quartz brick with a size of 865mm x 635 mm x 457mm, the cathode is a graphite plate, and the anode is a graphite rod. The following fig

First, sodium hypochlorite generator 1. Performance characteristics: SKC series sodium hypochlorite generator Our factory digests the advanced technology of the United States, and has made repeated research and test on electrode materials, anode and cathode spacing, and electrolysis area. The sodium hypochlorite produced by electrolysis has a broad spectrum of oxidation and bactericidal ability and can kill various spore viruses in water. The anode life of the equipment is 5-7 years, the power supply performance is reliable, and the corrosion resistance is strong. The electrolytic cell is composed of titanium plate and polyvinyl chloride white plastic plate. 2. working principle: The SKC type sodium hypochlorite generator is a combined form, which is metered into the electrolytic cell by dilute brine metering, and is electrolyzed by a silicon rectifier to generate sodium hypochlorite. 1 kg of sodium hypochlorite salt consumption: 4.0-4.2; power consumption: 4.3-4.5KW. In the brine solution, several ions such as Na+ and H- are contained. According to the theory of electrolysis, when the electrode is inserted, at a certain voltage, the electrolyte solution undergoes conduction due to the movement of ions and the reaction of the electrode. At this time, CL-, OH- The negative ions move toward the anode, and positive ions such as Na+ and H+ move toward the cathode, and discharge occurs on the corresponding electrodes, thereby performing a redox reaction to generate a corresponding substance. The salt water electrolysis process can be expressed by the following reaction equation: NaCl = Na + + Cl - Anode electrolysis: H2O=H+OH-2Cl-2e-→Cl2↑ Cathodic electrolysis: 2H-+2e-→H2↑ In the non-diaphragm electrolysis device, the electrolyte and the electrolyzed product are escaping outward in the