发明授权
- 专利标题： Process for working up phosphoric acid
- 专利标题（中）： 处理磷酸的工艺
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申请号： US508891申请日： 1990-04-12
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公开(公告)号： US4971778A公开(公告)日： 1990-11-20
- 发明人: Gerhard Bettermann , Gunther Schimmel , Jens Tiedemann
- 申请人： Gerhard Bettermann , Gunther Schimmel , Jens Tiedemann
- 申请人地址： DEX Frankfurt am Main
- 专利权人： Hoechst AG
- 当前专利权人： Hoechst AG
- 当前专利权人地址： DEX Frankfurt am Main
- 优先权： DEX3913853 19890427
- 主分类号： C01B25/027
- IPC分类号： C01B25/027 ; C01B25/18 ; C01B25/238 ; C01B25/24
摘要：
For working up concentrated, preferably partially condensed phosphoric acid which is contaminated with organic components, the phosphoric acid is first thoroughly mixed with fine-grained sand in a weight ratio of (0.5 to 1.5):1. Then, to neutralize the mixture, a basic, oxygen-containing calcium compound is added, while the thorough mixing is continued, until a 10% aqueous suspension of the mixture to which the calcium compound has been added has a pH between 5 and 11. Finally, the mixture which contains the calcium compound is commminuted after cooling.
公开/授权文献
- US5533873A Induction regulator valve for rotary compressors 公开/授权日：1996-07-09
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