发明名称 |
METHOD FOR PRODUCING DOUBLE METAL CYANIDE (DMC) CATALYSTS |
摘要 |
The invention provides an improved process for the preparation of double metal cyanide (DMC) catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, in which aqueous solutions of a metal salt and a metal cyanide salt are first reacted in the presence of an organic complexing ligand and optionally one or more further complex-forming components to form a DMC catalyst dispersion, this dispersion is then filtered, the filter cake is subsequently washed with one or more aqueous or non-aqueous solutions of the organic complexing ligand and optionally one or more further complex-forming components by a filter cake washing and the washed filter cake is finally dried, after an optional pressing out or mechanical removal of moisture. |
申请公布号 |
EP1276563(B1) |
申请公布日期 |
2004.06.30 |
申请号 |
EP20010933839 |
申请日期 |
2001.04.17 |
申请人 |
BAYER MATERIALSCIENCE AG |
发明人 |
HOFMANN, JOERG;EHLERS, STEPHAN;KLINKSIEK, BERND;FECHTEL, THORSTEN;RUHLAND, MATTHIAS DR.;SCHOLZ, JUERGEN;FOEHLES, FRANZ;ESSER, ULRICH |
分类号 |
C08G65/10;B01J27/26;C08G65/26 |
主分类号 |
C08G65/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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