HIGH PURITY POLYETHER POLYOLS

摘要

The present invention concerns high purity polyether polyol compositions and, preferably, polyethylene glycol (PEG) compositions which are useful to provide low calorie food for those who wish to control their tendency to be overweight. A process for the purification of polyethylene glycol through cation and anion ion exchange resins is known. However, this process does not remove the PEG oligomers. The present process comprises subjecting the polyether polyol compositions to membrane filtration to remove substantially all of the impurities, leaving only less than about 10 parts per million of the low molecular weight oligomers in the polyether polyol composition. 37,537-F