发明授权
US4980071A Substituted thioureas for the separation of complexly bound heavy-metal
ions
失效
用于分离复合结合的重金属离子的取代的硫脲
- 专利标题: Substituted thioureas for the separation of complexly bound heavy-metal ions
- 专利标题(中): 用于分离复合结合的重金属离子的取代的硫脲
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申请号: US436249申请日: 1989-11-14
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公开(公告)号: US4980071A公开(公告)日: 1990-12-25
- 发明人: Michael Schuster , Karl-Heinz Koenig , Hermann Lotter , Karlheinz Drauz
- 申请人: Michael Schuster , Karl-Heinz Koenig , Hermann Lotter , Karlheinz Drauz
- 申请人地址: DEX
- 专利权人: Degussa Aktiengesellschaft
- 当前专利权人: Degussa Aktiengesellschaft
- 当前专利权人地址: DEX
- 优先权: DEX3839222 19881119
- 主分类号: C02F1/62
- IPC分类号: C02F1/62 ; C02F1/52 ; C22B3/34
摘要:
Heavy metals can be precipitated from waste water or aqueous reaction solutions containing inorganic and/or organic complexing agents with substituted thiorureas of the general formula R.sub.1 R.sub.2 N-CS-NH-COR.sub.3. N,N-dialkyl-N'-benzoyl thioureas are used with preference, whereby methyl, ethyl, n-propyl or isobutyl groups are used as alkyl substituents.
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