MANUFACTURING METHOD FOR TETRAHYDROFURAN

PROBLEM TO BE SOLVED: To provide an industrially advantageous manufacturing method for tetrahydrofuran comprising manufacturing tetrahydrofuran from 1,4-butanediol as a raw material using an acid catalyst having a pKa value of 4 or lower that permits avoidance of deposition of a solid byproduct to s...

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Bibliographische Detailangaben
Hauptverfasser:	TANAKA KOTA, NISHIMURA SEIJIRO, UTSUNOMIYA MASARU, HATTORI EIJI, YAMASHITA AKIRA
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an industrially advantageous manufacturing method for tetrahydrofuran comprising manufacturing tetrahydrofuran from 1,4-butanediol as a raw material using an acid catalyst having a pKa value of 4 or lower that permits avoidance of deposition of a solid byproduct to stably attain high productivity.SOLUTION: The manufacturing method for tetrahydrofuran comprises feeding 1,4-butanediol as a raw material into a reactor and carrying out a dehydrative cyclization reaction in the presence of an acid catalyst having a pKa value of 4 or lower to obtain tetrahydrofuran as a product, where the absorbance measured at one or more wavelengths selected within the measurement wavelength range of 650-750 nm is at least 0.01 and at most 3.0 based on the UV spectrum of the solution in the reactor.