Sodium tungstate as mordant
The main uses of sodium tungstate are the production of ammonium paratungstate (APT), ammonium metatungstate (AMT), tungstic acid (H2WO4), and deep processing to produce tungsten trioxide (WO3), metal tungsten, tungsten carbide, hard alloy, Tungsten rod, tungsten wire, etc. In addition, sodium tungstate has some special uses and can be used to prepare other tungsten compounds for petrochemical catalysts, electroplating, textiles, flame retardants, water treatment, dyes, pigments, inks, etc.
Some special purpose performances are as follows:
1. Mordant (English name: Mordant). It is widely used in chemistry and biology. Sometimes it is not feasible to stain cells and tissues only with dye solution. At this time, it can be treated with a drug solution that combines cells, tissues and pigments, and the material can be dyed. This drug solution is a mordant. It also refers to the substance used by the dye to dye the fabric through a certain medium to achieve the purpose of dyeing;
2. Catalyst. Substances that can change the chemical reaction rate of the reactants (both increase and decrease) in a chemical reaction without changing the chemical balance, and whose mass and chemical properties have not changed before and after the chemical reaction;
3. Stabilizer. Sodium tungstate has excellent thermal stability, which is superior to traditional lead salts and barium, zinc, pick stabilizers; and, in some applications, sodium tungstate stabilizers can partially or completely replace organotin;
4. Fabric weighting agent. Sodium tungstate can be used as a textile auxiliary in textiles. The mixture composed of sodium tungstate, ammonium sulfate, ammonium phosphate, etc. is used for fireproofing and waterproofing of fibers. Moreover, this fiber can be used to make fireproof rayon and rayon. for leather tanning;
5. Anti-corrosion of electroplating coating;
6. As a solvent, the introduction of enamel pigment can reduce the firing temperature and complement the color;
7. Used in the manufacture of petroleum industry and aviation and aerospace materials.
The use of sodium tungstate
2023 07/26