Silicotungstic acid can be prepared by mixing sodium silicate and tungsten trioxide, and then adding hydrochloric acid. Silicotungstic acid is a heteropolyacid of Keggin structure, which belongs to the Td point group.
The preparation method of silicotungstic acid and its salt is used to solve the problem of non-ether preparation. The non-ether method is used to produce silicotungstic acid and its salt. It uses ammonium paratungstate as raw material, and undergoes processes such as transformation, silicon compounding, exchange, evaporation and concentration. Obtain silicotungstic acid product, and then prepare silicotungstate. Proceed as follows:
1) transformation;
2) with silicon;
3) exchange;
4) Evaporation and concentration;
5) Preparation of silicotungstate.
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