公开(公告)号：EP1753802B8

公开(公告)日：2008-04-02

申请号：EP05744275.8

申请日：2005-04-21

Applicant: BASF SE

Inventor： OSTROWSKI, Thomas ,  RUPPEL, Raimund ,  HÖPPNER, Gerd ,  BERGMANN, Sascha ,  VANDEWALLE, Koen ,  BAUM, Eva

IPC: C08G65/26 ,  C08G18/48

CPC classification number: C08G65/2696 ,  C08G18/4841 ,  C08G18/4866 ,  C08G65/2663

Abstract: Process for preparing polyether polyols having an end block of ethylene oxide by addition of alkylene oxides onto H-functional starter substances, in which A) a polyether polyol precursor is prepared by means of double metal cyanide (DMC) catalysis in a semicontinuous mode of operation in which previously prepared polyether polyol together with the DMC catalyst are placed in a reactor and H-functional starter substance and propylene oxide are added continuously; B) the polyether polyol precursor from stage A) is reacted with propylene oxide or an ethylene oxide/propylene oxide mixture in the presence of the DMC catalyst in a continuously operating reactor to give a polyether polyol intermediate; C) the intermediate from stage B) is mixed with an alkali metal hydroxide as catalyst and D) reacted with ethylene oxide in a continuously operating reactor to give the final product; E) the catalyst is separated off from the final product obtained in stage D).

Abstract translation: 通过将烯化氧加成到H-官能起始物质上来制备具有环氧乙烷端嵌段的聚醚多元醇的方法，其中A）聚醚多元醇前体通过双金属氰化物（DMC）催化以半连续操作模式 其中将预先制备的聚醚多元醇与DMC催化剂一起置于反应器中，并连续添加H官能起始物质和环氧丙烷; B）在DMC催化剂存在下，在连续操作的反应器中使来自阶段A）的聚醚多元醇前体与环氧丙烷或环氧乙烷/环氧丙烷混合物反应，得到聚醚多元醇中间体; C）将来自阶段B）的中间体与作为催化剂的碱金属氢氧化物混合，并且D）在连续操作的反应器中与环氧乙烷反应以得到最终产物; E）将催化剂从阶段D）中获得的最终产物中分离出来。