Guizhou Zunyi Titanium Factory is China's largest large-scale smelting plant for sponge titanium. It is the leading sponge titanium production plant in China. In the smelting process, a large amount of chlorine gas is generated. In order to reduce environmental pollution, water is used to remove chlorine. This produces a large amount of waste hydrochloric acid. The concentration of this waste acid is about 20%, which is difficult to handle, and because the waste acid contains a large amount of impurities. Therefore, there are certain difficulties in recycling it. It is imperative to solve the problem of waste hydrochloric acid in titanium plants. As one of China's Guizhou province's mineral resources, its reserves of manganese ore of living in a third country. The manganese ore resources in Guizhou Province are mainly distributed in Zunyi and Songtao. With the serious disorderly mining in recent years, the grade of manganese ore resources has gradually decreased. In this low-grade rhodochrosite as metallurgy, chemical industry raw materials, difficult to be exploited. Because most of the manganese ore resources in Guizhou Province are characterized by poverty, fineness and miscellaneous, there is certain difficulty in mineral processing . The comprehensive utilization of low-grade manganese ore resources in Zunyi and Songtao has always been a concern of researchers in metallurgical and chemical industries. The problem. Therefore, the authors propose an experimental scheme for the preparation of manganese chloride tetrahydrate from low-grade rhodochrosite in Zunyi by using hydrochloric acid waste hydrochloric acid. The single factor method is used to investigate the leaching temperature, leaching time, liquid-solid ratio and acid excess coefficient. The effect on manganese leaching rate.

Automatic acid value meter / acid value meter Model: TYD-TRY-5 Instrument Description: TYD-TRY-5 type automatic acid value meter is based on the requirements of China's power and petrochemical departments for measurement operation The new product of transformer oil and turbine oil acid value is suitable for determining the acid value of petroleum products as specified in GB7599-87. The instrument fully absorbs the advantages of the company and similar products at home and abroad, implements the people-oriented design concept, and adopts modern design methods for product structure, control circuit and program. It is an ideal replacement product for the current petroleum product acid value measuring instrument. First, the instrument features: 1, using the neutralization method of measurement principle 2, the instrument automatically completes the addition, titration, stirring and automatic determination of the end point of the titration 3, with a special reagent bottle containing the extract and neutralizing liquid, the reagent does not Air contact avoids the effects of solvent evaporation and carbon dioxide in the air. The user does not touch the solvent by hand, which reduces the harm of organic solvents and chemicals to the human body. 4. The instrument is easy to operate, large-screen LCD display, Chinese menu selection, the user only needs to select the menu function, press the screen prompt to input relevant data and confirm, the instrument can automatically complete the whole process of acid value determination. 5. Two samples can be continuously measured. Second, the technical indicators: 1, the measurement range: 0.001 ~ 0.100mgKOH / g between ± 0.005mgKOH / g acid value between 0.100 ~ 0.400mgKOH / g is ± 5% of the indicated value 3, the repeatability of the indication: 0.004 mgKOH/g 4, minimum resolution: 0.001mgKOH/g 5. Printing method: thermal printing 3. Working strip: 1. Ambient temperature: 5-40°C 2. Relative humidity ≤ 85% RH 3. No corrosiv

Hospital supply room hydrogen peroxide low temperature plasma harmful gas monitoring alarm related requirements Hydrogen peroxide, chemical formula H2O2. Pure hydrogen peroxide is a light blue viscous liquid that is miscible with water in any proportion. It is a strong oxidant. The aqueous solution is commonly called hydrogen peroxide and is a colorless transparent liquid. Its aqueous solution is suitable for medical wound disinfection and environmental disinfection and food disinfection. Under normal circumstances, it will slowly decompose into water and oxygen, but the decomposition rate is extremely slow, and the speed of the reaction is accelerated by adding a catalyst such as manganese dioxide or the like, or irradiating with short-wave radiation. Oxidation and reduction in different cases. Used for photographic decontaminants; color positive blue thinning; film over-scale thinning. Very easy to break down, not easy to save Ander volume hospital supply room dedicated hydrogen peroxide leak alarm product features_______________________________________________________________________________________ Ander's amount of hydrogen peroxide leakage over-standard alarm is andeil sensor) combined with many years of experience in sensor core technology development, comprehensive medical, medical, supply room and other environments for hydrogen peroxide leakage residual concentration exceeding the standard monitoring alarm requirements, a fixed design for research and development Online liquid crystal display type hydrogen peroxide gas over standard alarm (also known as hydrogen peroxide sensor module probe). The output signal is 4-20mA signal or RS485, and is compatible with control systems

In order to better meet the requirements of the phosphate fertilizer industry for equipment technology in the new era, to further understand the development status and needs of outlet companies, to better serve equipment companies, and to make equipment service network replacement and promotion work, March 7, 2008. On the same day, the China Phosphate Fertilizer Industry Association and the China Sulfuric Acid Industry Association will hold a symposium on Phosphatic Fertilizer and Sulfuric Acid Equipment Manufacturing Enterprises and a Change of Work Conference in Beijing. China Phosphate Fertilizer Industry Association and China Sulfuric Acid Industry Association jointly established the [Phosphate Fertilizer and Sulfuric Acid Industry Equipment Service Network" in 1993. Since its establishment, it has been dedicated to serving China's phosphate fertilizer and sulfuric acid industry, and has continuously promoted the technological progress of the industry through its own development. In recent years, China's phosphate fertilizer and sulfuric acid industry has achieved remarkable achievements and gradually developed into a basic pillar industry with large-scale installations and advanced technology and equipment. Equipment manufacturing companies have made great contributions to this end. In order to further do a good job in serving the enterprise and achieving further development of the industry, the Phosphorus Fertilizer and Sulfuric Acid Association will hold this meeting to discuss the future development plan.

AAF fixative instructions ? Key words: fixative, buffer, biochemical solution, Qiaoyu biological reagent Product introduction : The purpose of fixation is to preserve the original morphological structure of cells and tissues. The fixative can prevent endogenous lysosomal enzymes from autolysis of their tissues and cells, and inhibit the growth of bacteria and molds. The immobilizing agent inactivates the enzyme by coagulation, formation of an added compound, and the like, thereby changing the internal structure of the protein. The fixative physically changes the extracellular components of the nucleus. The living cells are wrapped in an impermeable membrane before being fixed, and the fixative can destroy the barrier, allowing the macromolecular substance to penetrate the membrane and escape. The choice of fixative is extremely important for tissue staining and immunohistochemical staining. Usually, several fixatives are mixed and formulated into a composite fixative, which can adapt to the preservation of various tissues and cellular components. However, there is currently no standard fixative. Suitable for the preservation of all tissues and cellular components. The fixative is mainly divided into an aldehyde fixative, a mercury fixative, an alcohol fixative, an oxidant fixative, a picrate fixative, etc., and is commonly used in formalin and alcohol in aldehydes. Ethanol. ? AAF fixative, also known as alcohol formalin mixed fixative or FAA fixative, consists mainly of ethanol (A), acetic acid (A), and formaldehyde (F), and has both dehydration effects. AAF fixatives are commonly used for rapid dehydration and fixation as well as rapid fixation of frozen sections. ? product composition: name specificat

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-

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