What is Sodium Tungstate?
Sodium tungstate is a kind of tungstate, its chemical formula is Na2WOs. Appearance is colorless crystal or white orthorhombic crystal, glossy flaky crystal, or crystalline powder, sodium tungstate is soluble in water, the aqueous solution is slightly alkaline, insoluble in ethanol, and slightly soluble in ammonia. Weathered in the air. Heating to 100°C loses water of crystallization and becomes anhydrous. React with a strong acid (except hydrofluoric acid) to generate yellow tungstic acid which is insoluble in water. React with phosphoric acid or phosphate to generate a phosphotungstic heteropolyacid complex. React with tartaric acid, citric acid, oxalic acid, and other organic acids to form corresponding organic acid complexes.
Sodium tungstate, as the raw material for the chemical synthesis of tungsten, is an important intermediate in the process of converting tungsten ore into metal. Usually, the intermediate product obtained by decomposing tungsten concentrate by the alkaline process is sodium tungstate. However, the sodium tungstate here refers to the crude sodium tungstate containing impurities. It needs to undergo ion exchange, precipitation, extraction, and other processes to obtain tungstic acid, and finally obtain APT through evaporation and crystallization.
What is the preparation principle of sodium tungstate?
Tungsten trioxide reacts with sodium hydroxide or tungsten concentrate, and sodium hydroxide is pressure-boiled to generate a sodium tungstate solution. After purification, filtration, ion exchange, and other processes, the impurity components are separated, and then the sodium tungstate product is obtained through evaporation and crystallization.
What are the applications of sodium tungstate?
Although sodium tungstate is an intermediate product in the conversion process of tungsten ore, sodium tungstate has a wide range of uses. Sodium tungstate is not only a chemical product but also a high-quality semiconductor material, which can be used to control environmental pollution and manufacture new energy materials.
Currently known uses are as follows:
1. Used in mordants, analytical reagents, catalysts, water treatment chemicals, and in the manufacture of fireproof and waterproof materials, as well as phosphotungstate, boro tungstate, etc.
2. Used in the manufacture of ammonium para tungstate, ammonium metatungstate, tungstic acid, tungsten trioxide, metal tungsten, tungsten carbide, hard alloy, etc.
3. Used in mordants, pigments, dyes and inks.
4. It is used as a fabric weighting agent in the textile industry. This product is used as a fabric auxiliary agent. The mixture composed of sodium tungstate, ammonium sulfate and ammonium phosphate is used for fireproofing and waterproofing of fibers. This fiber can be used to make fireproof rayon and rayon. Can be used for leather tanning.
5. Used for anti-corrosion of electroplating coating. The combination of sodium tungstate and polyaspartic acid can be used as a corrosion inhibitor for metals to prolong the service life of metals in seawater and other corrosive environments.
6. It can be used as a cosolvent to introduce enamel pigments, which can lower the firing temperature and complement the color.
7. Used in the manufacture of petroleum industry and aviation and aerospace materials.
5. The combination of sodium tungstate and hydrogen peroxide can effectively photo-catalyze the degradation of methylene blue in dye wastewater.
6. Sodium tungstate can optimize the absorption of plant nitrogen, improve the fruit quality of fruit trees, and avoid the loss of nitrogen fertilizer.
7. Sodium tungstate can adjust the absorption of nitrate nitrogen by Nannochloropsis through compounding, so as to increase the production of raw oil and diesel.
8. Sodium tungstate can be made into an antifreeze agent through compounding to prevent the “cold disaster” of tea trees.
PS: In addition, some scholars believe that sodium tungstate can promote the proliferation, differentiation and secretion function of islet cells in vitro, and reduce serum total cholesterol (CHO) and triglyceride (TG) levels. It can be used as a raw material for treating diabetes, and can also be used to lower blood fat and lose weight. This clinical application has yet to be verified.
In the end
Sodium tungstate is widely used in various industrial fields and is one of the more common chemicals. For example, sodium tungstate is used to prepare ammonium para tungstate, ammonium metatungstate, tungstic acid, tungsten trioxide, metal tungsten, tungsten carbide, and cemented carbide. It can also be used in petrochemical catalysts, electroplating, textiles, flame retardants, water treatment, dyes, pigments, inks, etc. Jinbangch has rich experience in producing and selling sodium tungstate. We can provide you with various types of sodium tungstate to meet your different needs. Welcome to contact us to get samples of sodium tungstate.