发明授权
- 专利标题： Process for preparing ammonium metatungstate
- 专利标题（中）： 制备偏钨酸铵的方法
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申请号： US13388896申请日： 2009-12-30
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公开(公告)号： US08435467B2公开(公告)日： 2013-05-07
- 发明人: Zhangqing Luo
- 申请人： Zhangqing Luo
- 申请人地址： CN Jiangxi
- 专利权人： Jiangxi Rare Earth and Rare Metals Tungsten Group Corporation
- 当前专利权人： Jiangxi Rare Earth and Rare Metals Tungsten Group Corporation
- 当前专利权人地址： CN Jiangxi
- 代理机构： Hammer & Associates, P.C.
- 优先权： CN200910089165 20090805
- 国际申请： PCT/CN2009/076283 WO 20091230
- 国际公布： WO2011/015021 WO 20110210
- 主分类号： C01G41/00
- IPC分类号： C01G41/00
摘要：
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.
公开/授权文献
- US20120141359A1 PROCESS FOR PREPARING AMMONIUM METATUNGSTATE 公开/授权日：2012-06-07
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