发明名称 |
DMC COMPLEX CATALYST AND PROCESS FOR ITS PREPARATION |
摘要 |
A process for the preparation of a DMC catalyst useful in the polymerization of alkylene oxides into polyether polyols, which process having the steps of (a combining an aqueous solution of a metal salt with an aqueous solution of a metal salt with an aqueous solution of a metal cyanide salt and reacting these solutions, wherein at least part of this reaction takes place in the presence of an organic complexing agent, thereby forming a dispersion of a solid DMC complex in an aqueous medium; (b) combining the dispersion obtained in step (a) with a liquid, which is essentially insoluble in water and which is capable of extracting the solid DMC complex formed in step (a) from the aqueous medium, and allowing a two-phase system to be formed consisting of a first aqueous layer and a layer containing the DMC complex and the liquid added; (c) removing the first aqueous layer; and (d) recovering the DMC catalyst from the layer containing the DMC catalyst. |
申请公布号 |
PL358016(A1) |
申请公布日期 |
2004.08.09 |
申请号 |
PL20010358016 |
申请日期 |
2001.03.27 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV. |
发明人 |
ELEVELD MICHIEL BAREND;DE GROOT RIEMER ALBERTS;VAN KEMPEN RONALD;SMIT JOHAN PAUL |
分类号 |
C08G65/10;B01J27/26;B01J37/04;C08G65/12;C08G65/26;C08G65/30 |
主分类号 |
C08G65/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|