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    IMPROVED CONTINUOUS PROCESS FOR THE PRODUCTION OF LOW MOLECULAR WEIGHT POLYETHERS WITH A DMC CATALYST
    1.
    发明公开
    IMPROVED CONTINUOUS PROCESS FOR THE PRODUCTION OF LOW MOLECULAR WEIGHT POLYETHERS WITH A DMC CATALYST 有权
    改进的连续过程低分子聚醚与DMC催化剂的制备

    公开(公告)号：EP2970583A4

    公开(公告)日：2017-02-22

    申请号：EP14775387

    申请日：2014-03-12

    申请人： COVESTRO LLC

    发明人： REESE JACK R ,  WEBB PAUL

    IPC分类号： C08G65/10 ,  C08G18/48 ,  C08G65/26

    CPC分类号： C07C41/03 ,  C08G65/2609 ,  C08G65/2663 ,  C08G65/2696

    摘要： Low molecular weight polyoxyalkylene polyether polyols having a hydroxyl content of from about 3.4 to about 12.1% by weight, and OH numbers of from about 112 to about 400 are produced by a continuous process using a DMC catalyst. In the process of the present invention, oxyalkylation conditions are established in a continuous reactor in the presence of a DMC catalyst; alkylene oxide and a low molecular weight starter are continuously introduced into the continuous reactor; a partially oxyalkylated polyether polyol is recovered from the reactor; and the recovered partially oxyalkylated polyether polyol is allowed to further reactor until the unreacted alkylene oxide content of the mixture is reduced to 0.001% or less by weight. The alkoxylation of the present invention must be carried out a pressure sufficiently high to prevent deactivation of the DMC catalyst. Pressures of from 45 to 55 psia are preferred.

    摘要翻译： 重量的低分子量聚氧化烯具有约3.4至约12.1％的羟基含量的聚醚多元醇，以及从约112至约400，通过使用DMC催化剂以连续方法制造的OH值。 在本发明的方法中，烷氧基化条件都建立了在DMC催化剂存在下的连续反应器中; 亚烷基氧化物和低分子量起始连续引入到连续反应器中; 一个部分烷氧基化聚醚多元醇，从反应器中回收; 将回收的部分烷氧基化的聚醚多元醇被允许つweiterer反应器，直到混合物的未反应的，氧化烯含量（重量）减少到0.001％以下。 本发明的烷氧基化，必须充分进行高的压力，以防止所述DMC催化剂的失活。 从45到55的PSIA压力是优选的。