Process for preparing ammonium metatungstate

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United States of America Patent

PATENT NO 8435467
APP PUB NO 20120141359A1
SERIAL NO

13388896

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Abstract

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A process for preparing ammonium metatungstate using ammonium paratungstate as raw material comprising: (A) leaching wet ammonium paratungstate with nitric acid to obtain a dilute solution of ammonium metatungstate; (B) concentrating the dilute solution of ammonium metatungstate to be a concentrated solution of ammonium metatungstate; and (C) spray-drying the concentrated solution of ammonium metatungstate to obtain powder of ammonium metatungstate.

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Patent Owner(s)

Patent OwnerAddress
JIANGXI RARE EARTH AND RARE METALS TUNGSTEN GROUP CORPORATIONNO 118 BEIJING WEST ROAD NANCHANG JIANGXI 330046

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Inventor Name Address # of filed Patents Total Citations
Luo, Zhangqing Jiangxi, CN 1 2

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