A Preparation Method of Ammonium Paratungstate

The researchers proposed a preparation method of ammonium paratungstate, in which the obtained APT is high-purity APT. That is because: with the continuous development of the tungsten industry, the ammonium paratungstate products produced by the existing ion exchange method and extraction method are increasingly unable to meet the requirements of producing high-quality tungsten deep processing products.

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A Preparation Method of Ammonium Paratungstate

Adopt ion exchange method or extraction method to produce APT with the total impurity content <177.5ppm, which reaches the national standard level 0; Calcine APT to produce tungsten trioxide; Dissolve the produced tungsten trioxide with ammonia solution to produce ammonium tungstate solution; Evaporate and crystallize the obtained ammonium tungstate solution to obtain wet ammonium paratungstate crystals; Dry and sieve the wet ammonium paratungstate crystals to obtain high-purity ammonium paratungstate with a total impurity content of <65 ppm.

ChinaTungsten Online has been developing, producing, and selling tungsten chemicals such as APT, AMT and tungsten oxides since the late 1990s. Our APT is used to manufacture products in different industries including aerospace, electronics, hard materials, energy and others. APT is used as a source for high-purity tungsten oxides, tungsten metal powders, carbides, or as a laboratory reagent. Other applications are in the fields of absorbent gels, coloring agent in the porcelain industry, and in the catalyst industry.

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