Tungsten Oxide

Cyclohexanone is an important chemical raw material, widely used in fibers, synthetic rubber, industrial coatings, pharmaceuticals, pesticides, organic solvents and other industries. Cyclohexanone is the main intermediate for the synthesis of caprolactam and adipic acid, and it is also a raw material for the preparation of spices, rubber antioxidants, adhesives, vinegar and fruit preservative phenolic phenol, and can also be used as fine chemical auxiliaries. The traditional way to produce cyclohexanone is to produce cyclohexanol by hydrogenation of cyclohexanol, and then to reduce the cyclohexanol to the ring chamber by chemical method. There are two conventional preparation methods: One is in zinc catalyzed by 400 to 500 °C under oxidative dehydrogenation to cyclohexanone; The other was prepared by adding chromic acid catalyst with bleaching powder as oxidizing agent under weak acid condition. Among them, there is a problem, that is, there is no ideal catalyst, or the re...

With the shortage of tungsten ore resources, the utilization of tungsten resources becomes more and more urgent. Waste tungsten alloy is one of the main sources of tungsten recovery, according to statistics, about 35% of the tungsten in Europe and America developed from waste tungsten alloy recycling. With the emphasis on tungsten resources in China, the recycle rate of tungsten resources in China has been increasing year by year, and it has reached 20%. In the tungsten recycling process, the sodium carbonate melting method of waste tungsten recycle process technology is more mature and wide applicability of the program, but it is inevitable that the leaching process in recycling of waste tungsten, scrap tin, phosphorus, chromium, molybdenum and other impurities may also enter coarse sodium tungstate solution, thus affecting the purity of tungsten products. The main impurities of the waste alloy are different, the treatment method varies according to material, here to introdu...

Sodium tungstate is an important chemical raw material and an important intermediate product in tungsten metallurgy production. Generally speaking, industrial production of sodium tungstate mainly uses scheelite concentrate or wolframite concentrate as raw material, and the production cost is higher. In the tungsten concentrate production process, there are often some tungsten due to process or equipment reasons, lead to part of the tungsten ore grinding machine into powder or no successful flotation into the tailings, forming tungsten fine mud. The conventional recycle process of tungsten slime is tungsten slime - sodium tungstate - ammonium paratungstate. How can the sodium tungstate be recycled more efficiently by using tungsten slime? Compared with wolframite, fine scheelite slime is characterized by lower grade, more impurities, and more calcium containing molybdenum, which is more difficult to purify. In view of the above, we can use hot ball milling alkali deco...

With the shortage of tungsten ore resources, the utilization of tungsten resources becomes more and more urgent. Waste tungsten alloy is one of the main sources of tungsten recycle. According to statistics, about 35% of the tungsten in Europe and America developed from waste tungsten alloy recycling. With the emphasis on tungsten resources in China, the recycle rate of tungsten resources in China has been increasing year by year, and it has reached 20%. In the waste recycling process of tungsten alloy technology, recycle process of waste tungsten by sodium carbonate smelting process is relatively mature and widely applicable, much as it is used, but a lot of problems also appeared in the actual production, the most troublesome is chromium. During the leaching of waste tungsten alloy by sodium carbonate smelting process, a large amount of chromium impurity elements also enter into sodium tungstate solution, which can not meet the purity of tungsten products. The chemica...

Sodium tungstate is a kind of tungstate, and its chemical formula is Na 2 WO 4 . In nature, sodium tungstate appears to be colorless crystalline or white crystalline powder, and sodium tungstate is now known to replace sodium vanadate in the treatment of diabetes. However, with the study of sodium tungstate in the field of medical treatment, some American scholars have suggested that sodium tungstate can also be used to treat hyperlipidemia and obesity. Hyperlipidemia refers to the high level of blood lipids, can directly cause some serious harm to human health diseases, such as atherosclerosis, coronary heart disease, pancreatitis and obesity, this symptom is more common in the United States, which is related to diet. In medicine, high blood lipids are caused by elevated levels of triglycerides (TG) and total sterols (CHO) in the blood. In order to investigate the possibility of sodium tungstate in the treatment of hyperlipidemia, Chinese medical workers were tested w...

Sodium tungstate is a kind of tungstate, and its chemical formula is Na 2 WO 4 . In nature, sodium tungstate is a colorless crystalline or white crystalline powder, and is often used as a plant protection, metal corrosion inhibitor and photocatalytic agent because of its non-toxic and environmental advantages. But is rarely known by people that sodium tungstate can also be used to treat diabetes. Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia. Hyperglycemia is caused by insulin secretion defects or impaired biological effects, or both. The consequences of diabetes are easy to cause eye, kidney, heart, blood vessels, nerves of chronic damage, dysfunction, such as high blood pressure, stroke, etc., is a healthy killer of middle-aged and elderly people. The traditional compound for the preparation of diabetes is vanadate, which is a simple inorganic vanadium compounds such as sodium vanadate, vanadyl sulfate etc.. Vanadium insulin has been widel...

Sodium tungstate is a kind of tungstate, and its chemical formula is Na 2 WO 4 . The appearance is colorless crystalline or white crystalline powder, soluble in water, insoluble in ethanol, slightly soluble in liquid ammonia, when confront a strong acid it is broken down into tungstic acid dissolved in water. Sodium tungstate, as a raw material for chemical synthesis of tungsten, is an important intermediate in the transformation of tungsten into metals, usually, the intermediate product is broken down by alkaline process, and sodium tungstate is obtained, but in here sodium tungstate refers to crude sodium tungstate containing impurities. It also needs to be obtained by ion exchange, precipitation, extraction and other processes. Finally, APT is obtained by evaporation crystallization. Although sodium tungstate is an intermediate product of tungsten in the process of transformation, we use a lot of sodium tungstate, usually used in industrial products in tungstate refers to ...

Monoalkyl phosphate is an important surfactant, widely used in chemical fiber, textile, leather, plastics, paper making and cosmetics.  Monoalkyl phosphate usually synthesized by the esterification of phosphoric acid with aliphatic alcohols by esterification. The commonly used phosphorus agents are three oxychloride (POCl 3 ) and phosphoric acid. When phosphorus oxychloride is used as an agent for HCL, it is easy to cause environmental pollution, when phosphoric acid is used as a phosphate agent, although it is environmentally friendly, it is difficult to synthesize monoester, diester and three ester because of the low activity of phosphoric acid. Is there a way to improve the activity of phosphoric acid to help balance the benefits of the environment? Cesium phosphotungstate is a kind of heteropoly acid. It is a new type of multifunctional catalyst. It has not only oxidation reduction property, but also high catalytic activity and good stability, it can be used fo...

Photocatalysis is a photochemical reaction in the presence of a catalyst, it is a new science and technology. Common photocatalysts include metal oxides (TiO 2 , ZnO, Fe 2 O 3 , Bi 2 O 3 , WO 3 ) and metal sulfides (CdS, MoS 2 , MoSe 2 ). Titanium dioxide TiO 2  is the most white thing in the world, 1 grams of titanium dioxide can paint more than 450 square centimeter area to white. So it's the best paint for making white oil paint. The most well-known is that semiconductor photocatalysis performance of TiO 2 . TiO 2  photocatalysis is widely used because of its high activity, photochemical stability, non-toxic and cheap. Tungsten trioxide TiO 2  is a kind of tungsten compounds that are widely used, It can be used not only for hard alloys, but also for dyes, the most commendable thing is that tungsten trioxide also with excellent photocatalytic performance. Like TiO 2 , WO 3  also has high activity, photochemical stability, non-toxic and so on. If you com...

Cesium tungsten bronze (Cs x WO 3 ) is synthesized by solid phase method or liquid phase method with cesium carbonate and sodium tungstate as raw materials. Cesium tungsten bronze is also called cesium tungstate.  Cs x WO 3  is a non stoichiometric functional compound with a special structure of oxygen eight surface, with low resistivity and low temperature superconducting properties. But in recent years, cesium tungsten bronze is popular for its excellent UV and near infrared shielding performance, with high efficiency, insulation and light reflection effect, this makes it good in the manufacture of special glass, high-end insulation film and LCD screen manufacturing. In recent years, with the increasing popularity of cesium tungsten bronze, more and more scholars have begun to discuss the liquid phase preparation of cesium tungsten bronze. Some scholars have adopted the hydrothermal method to obtain cesium tungsten bronze, sodium tungstate and cesium carbonate were ...

Sodium tungstate , Na 2 WO4•2H 2 O, a tungstate of sodium, is useful as a source of tungsten. It is prepared from tungsten ores to manufacture tungsten by reducing it. It is often found as dihydrate. If you have any inquiry of  tungsten , please feel free to contact us: Email:  sales@chinatungsten.com / sales@xiamentungsten.com Tel.: +86 592 5129696/+86 592 5129595 Fax: +86 592 5129797 Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Adipic acid is mainly used for nylon 66 engineering plastics and raw materials, and in the production of various ester products. Adipic acid is also used for polyurethane elastomer material, acidifier various foods and beverages, sometimes its better than citric acid and tartaric acid. Adipic acid has many functions and a huge demand, but it is a big polluter. The industrial process mainly uses nitric acid to oxidize cyclohexanol and cyclohexanone (KA oil). The method has high yield, but nitric acid seriously damages the equipment and produces a large amount of nitrogen oxides which pollute the environment seriously. With the improvement of human environmental protection consciousness, people urgently need to find environmental protection and pollution-free solutions to solve the problem of adipic acid production. In recent years, Cao Fabin, a scholar, has proposed that adipic acid is used as catalyst to synthesize adipic acid, according to previous experience, he uses tun...

There are many inhibitors of scheelite flotation, but the most popular and widely used is sodium silicate , which is recognized by industry as the most effective and cost effective inhibitor. Sodium silicate , commonly known as water glass , the molecular formula Na 2 SiO 3  is a water-soluble silicate, is a kind of mineral binder, non-sulfide ore, especially a typical inhibitor of silicate minerals. Sodium silicate is selected in the floating scheelite and playing two main functions: one is to make the silica gel modified by physical adsorption on mineral surface, two is the adsorption of SiO 3 2- , HSiO 3 - , OH -  and H +  on the surface of quartz and silicate minerals, which increases the electronegativity and hydrophilicity of the mineral surface. In scheelite flotation process, sodium silicate was inhibited in quartz, calcite and silicate, generally speaking, sodium silicate is selective when used in low dosage, but using too much will lose the selecti...

Cesium tungsten bronze (Cs x WO 3 ) is synthesized by solid phase method or liquid phase method with cesium carbonate and sodium tungstate as raw materials. Therefore, cesium tungsten bronze is also called cesium tungstate. Cesium tungsten bronze Cs x WO 3  has the function of oxygen compounds in eight face special structure, with low resistivity and low temperature superconducting propertiesaterials. It mainly used to make high-temperature insulation coating, building glass, Low-E glass, automobile insulation film, plant planting shed, LCD screen and so on. Synthetic of cesium tungsten bronze can be obtained by solid phase method and liquid phase method. In the earlier period, most of cesium tungsten bronze was prepared by solid phase synthesis, such as vapor phase reduction and hydrogen reduction, but the synthesis of solid phase is difficult and the cost is too high. Therefore, with the increasing attention of cesium tungsten bronze, more and more scholars began to stu...

Cesium tungsten bronze (Cs x WO 3 ) is a kind of tungstate powder synthesized by solid phase method or liquid phase method with cesium carbonate and sodium tungstate as raw materials. Cesium tungsten bronze is also called cesium tungstate.  As everyone knows, the sun's heat is mainly concentrated in the two part of the visible light and near infrared light, cesium tungsten bronze Cs x WO 3  particles can ensure good visible light transmittance, and can cover most of the near infrared caused by heat, and cesium tungsten bronze is an ideal material for manufacturing automotive insulation film. However, in the manufacture of cesium tungsten bronze Cs x WO 3  heat insulation film, it is found that Cs x WO 3  particles are difficult to disperse in solution, and attached to the heat insulation film. In order to realize the near infrared shielding function of cesium tungsten bronze Cs x WO 3  particles, the dispersion and stability of particles in slurry must...