Sodium antimonate is also known as sodium pyroantimonate in China, and its molecular formula is. Sodium antimonate used to be mainly used in glass industry and cast iron enamel, etc. In recent years, with the development of science and technology, sodium antimonate has partially replaced antimony trioxide in some flame retardants and electronic products.

Sodium pyroantimonate is a white powder, granular crystals and equiaxial crystals, high temperature resistance, in 1000 ℃ does not decompose, can be used as a high-grade glass clarifier and decolorant, plastics and textiles, flame retardants, enamel and ceramics, emulsifier and casting paint opaque paint. Sodium pyroantimonate is white or off-white crystalline powder, easily soluble in hot water, insoluble in cold water, insoluble in ethanol.

In our country, the use of sodium antimonate was introduced from Japan in the 80's color TV tube glass production line only after the beginning. Sodium antimonate is also used as catalytic clarifier. At the beginning, the sodium antimonate used in the production of color TV picture tube glass in China was supplied by Japan, and after 1986, it began to use the sodium antimonate developed in China gradually.

Characteristics

Sodium antimonate in some areas to replace antimony trioxide, mainly due to the following factors:

(1) The use of sodium antimonate is cost-effective, and generally saves about 20% of the cost of raw materials.

(2) Sodium antimonate is used as clarifier in special glass industry such as electronic tube, which can improve the transparency of glass.

(3) When antimony trioxide is used as glass clarifying agent, it is necessary to convert trivalent antimony into pentavalent antimony, and antimony in sodium antimonate itself exists in the form of pentavalent antimony, which is quite favorable to the production.

(4) the use of antimony trioxide as a glass clarifier must be added to sodium nitrate, while the use of sodium antimonate does not need to add sodium nitrate.

(5) sodium antimonate coloring than antimony trioxide is much lower, and arsenic and lead content is also lower, used as a low coloring of plastics flame retardant is superior.

(6) The antimony content of sodium antimonate is much lower than antimony trioxide, and the two are used in flame retardants and cast iron enameling and other aspects of the number and effect of the difference is not great, it can be seen that the use of sodium antimonate can reduce the consumption of antimony.

Preparation method Firstly, sodium hydroxide and xylene trioxide instead of water are fully reacted, then ozone is passed, fully oxidized, recrystallized, centrifuged and dried, this invention uses ozone as oxidizing agent, with good oxidizing effect, and the method of microwave removal is used to obtain the sodium pyroximonate, and then the water of crystallization of the sodium pyroantimonate is removed by microwave, and finally, the pH is adjusted, and the drying, so as to get the neutral sodium metaantimonate. The water of crystallization of sodium pyroantimonate Chemicalbook can avoid high temperature yellowing of the generated sodium metaantimonate, adjust the sodium metaantimonate to neutral, and is more suitable for use as a flame retardant for polymer processing. The production process of the present invention is simple, short reaction time, environmentally friendly process, low production costs, gradually reduced, the preparation of sodium pyroantimonate and sodium metaantimonate obtained high purity, high whiteness, pH neutral, can be widely used as a flame retardant in the field of plastics. 

Uses

1、Used as opaque filler, emulsifier for enamel and acid-resistant paint for iron and steel plate;

2、It is used as the clarifier of high-grade glass such as picture tube and optical glass. It can resist exposure to sunlight and has good lampworking performance;

3、It is used as flame retardant for textiles, plastics, rubber and other industries;

4、Used in engineering plastics pending industry with low coloring power, saving pigment; used in enamel and acid-resistant ceramics, high-grade ceramics.

5、It is used for identifying sodium ion in chemical analysis.