Tungstic Acid

Tungstic Acid

In order to make use of the high APT purity in modern processing, tungstic acid is produced today by treating an aqueous APT crystal slurry with hydrochloric acid. In this way APT is decomposed and H2WO4 is precipitated. After filtration, it must be thoroughly washed to remove ammonium chloride. The earlier process of precipitation from sodium tungstate solutions by addition of acids no longer has industrial importance.

Tungstic acid has a high active surface. The former, most important intermediate today is only used in smaller quantities for special purposes:

1.       production of ultrafine tungsten and tungsten carbide powders in order to circumvent the sometimes disturbing pseudomorphology of APT-derived products, and

2.       for tungsten chemicals.

Please visit our site www.tungsten-powder.com in order to get more information about tungsten powder.