- 专利标题: Process for removing and regenerating a double metal cyanide (DMC) catalyst from a polymer polyol
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申请号: US10364788申请日: 2003-02-11
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公开(公告)号: US06806348B2公开(公告)日: 2004-10-19
- 发明人: Werner Hinz , Edward Michael Dexheimer
- 申请人: Werner Hinz , Edward Michael Dexheimer
- 主分类号: C08G600
- IPC分类号: C08G600
摘要:
A method of removing and reclaiming a double metal cyanide (DMC) catalyst from a polyol is disclosed. A polymeric acid that is soluble in the polyol is introduced into the polyol during or after the polymerization reaction. The polymeric acid reacts with the double metal cyanide catalyst thereby causing the double metal cyanide catalyst and the polymeric acid to form an agglomeration in the polyol. The agglomeration is easily separated from the polyol via filtration, for example. The recovered agglomerated DMC catalyst can then be reconstituted using an acid solution.
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