发明授权
- 专利标题： Process for working up heavy metal-containing residues originally from the decontamination of crude phosphoric acid
- 专利标题（中）： 原始来自粗磷酸去污的重金属残留物的处理方法
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申请号： US039792申请日： 1987-04-16
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公开(公告)号： US4762693A公开(公告)日： 1988-08-09
- 发明人: Gunther Schimmel , Reinhard Gradl , Friedrich Kolkmann
- 申请人： Gunther Schimmel , Reinhard Gradl , Friedrich Kolkmann
- 申请人地址： DEX Hurth Knapsack
- 专利权人： Hoechst Aktiengesellschaft
- 当前专利权人： Hoechst Aktiengesellschaft
- 当前专利权人地址： DEX Hurth Knapsack
- 优先权： DEX3522822 19850626
- 主分类号： B01D11/04
- IPC分类号： B01D11/04 ; C01B25/238 ; C01B25/46 ; C01G1/02 ; C22B3/38
摘要：
Residue obtained upon the removal of heavy metal contaminants from crude phosphoric acid by means of a dialkyldithiophosphoric acid ester and adsorbent is worked up into ecologically reliable solid matter and into a heavy metal concentrate. The solid matter and heavy metal concentrate are separated from one another by successive mechanical and chemical treatment. The sequential order of these two operational steps can be inversed.
公开/授权文献
- US4290441A Control device and method of making the same 公开/授权日：1981-09-22
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