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Production of polyoxytetramethylene glycol

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专利汇可以提供Production of polyoxytetramethylene glycol专利检索,专利查询,专利分析的服务。并且PURPOSE: To provide a process for producing PTMG from THF by using an inexpensive solid super acid catalyst which is free from antimony pentafluoride and easy to recover and recycle.
CONSTITUTION: A process for producing polyoxytetramethylene glycol comprising polymerizing tetrahydrofuran in the presence of a solid super acid catalyst comprising a compound metal oxide selected from the group consisting of the metal oxides of the general formula: M
x O
y (wherein x and y are each an integer of 1-3) and ammonium hydrogen-fluoride (NH
4 F.HF). Polyoxytetramethylene glycol can be produced efficiently in good yields by using a solid super acid catalyst which can easily be recovered and recycled and is more inexpensive as a polymerization catalyst.
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