MANUFACTURING METHOD FOR TETRAHYDROFURAN

PROBLEM TO BE SOLVED: To provide an industrially advantageous manufacturing method for tetrahydrofuran comprising manufacturing tetrahydrofuran from a 1,4-butanediol-containing liquid as a raw material that permits avoidance of deposition of solid matter to stably attain high productivity.SOLUTION:...

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Hauptverfasser:	TANAKA KOTA, NISHIMURA SEIJIRO, UTSUNOMIYA MASARU, IZAWA YUSUKE, 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 a 1,4-butanediol-containing liquid as a raw material that permits avoidance of deposition of solid matter to stably attain high productivity.SOLUTION: The manufacturing method for tetrahydrofuran comprises feeding, as a raw material, 1,4-butanediol containing 0.01-0.50 wt.% of 2-(4-hydroxybutoxy)-tetrahydrofuran 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 viscosity of the solution in the reactor at a viscosity measurement temperature of 25°C is at least 50 mPa sec and at most 1,300 mPa sec.