METHOD FOR PRODUCING TETRAHYDROFURAN

PROBLEM TO BE SOLVED: To provide an industrially useful method for producing THF (Tetrahydrofuran) from 1,4-butanediol by use of an acid catalyst, capable of stably providing high productivity while reducing deterioration of reaction rate and generation of a solid by-product.SOLUTION: The method for...

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Bibliographic Details
Main Authors IZAWA YUSUKE, UTSUNOMIYA MASARU, HATTORI EIJI
Format Patent
LanguageEnglish
Published 14.02.2013
Subjects
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary:PROBLEM TO BE SOLVED: To provide an industrially useful method for producing THF (Tetrahydrofuran) from 1,4-butanediol by use of an acid catalyst, capable of stably providing high productivity while reducing deterioration of reaction rate and generation of a solid by-product.SOLUTION: The method for producing the tetrahydrofuran produces the tetrahydrofuran by supplying a starting material 1,4-butanediol containing gamma-butyrolactone to a reaction tank and performing a cyclodehydration reaction in the presence of a homogeneous acid catalyst having a pKa of no greater than 4 and capable of being dissolved in 1,4-butanediol. When a gas containing water, the gamma-butyrolactone and the tetrahydrofuran in the reaction tank is introduced to a heat exchanger, and a condensed liquid is obtained at the exit of the heat exchanger, the ratio of the concentration of gamma-butyrolactone in the condensed liquid to the concentration of the gamma-butyrolactone in the starting material 1,4-butanediol is 20-100%.
Bibliography:Application Number: JP20120149936