公开(公告)号：US4946939A

公开(公告)日：1990-08-07

申请号：US359014

申请日：1989-05-30

申请人： Frank H. Murphy ,  Robert T. Jernigan ,  Jeff G. Grierson ,  Wayne G. Wessels

发明人： Frank H. Murphy ,  Robert T. Jernigan ,  Jeff G. Grierson ,  Wayne G. Wessels

IPC分类号： A23L33/20 ,  C08G65/02 ,  C08G65/28 ,  C08G65/30 ,  C08L71/02

CPC分类号： C08G65/30

摘要： High purity polyether polyol compositions such as polyethylene glycol are made having small amounts of impurities such as oligomers of active hydrogen compounds with alkylene oxides. The high purity is achieved by subjecting the polyether polyol compositions to membrane filtration to get less than about 10 parts per million of the low molecular weight oligomers.