| 摘要 |
THE PRESENT INVENTION PROVIDES A PROCESS FOR PREPARING POLYOXYALKYLENE GLYCOLS OF A CERTAIN MOLECULAR WEIGHT IN ONE STAGE BY COPOLYMERIZING TETRAHYDROFURAN AND ALPHA,OMEGA-DIOLS AS THE COMONOMER IN THE PRESENCE OF A HETEROPOLYACID AND OF A HYDROCARBON, BY DISTILLING OFF A MIXTURE OF WATER AND THIS HYDROCARBON FROM THE COPOLYMERIZATION, WHICH COMPRISES TERMINATING THE POLYMERIZATION WHEN THIS MOLECULAR WEIGHT IS ATTAINED BY ADDING WATER, COMONOMER, BUTANEDIOL OR BUTANEDIOL-WATER MIXTURES.
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