Verfahren zur Herstellung von Gamma-Butyrolacton

In a process for the preparation of gamma -butyrolactone by catalytically dehydrogenating 1,4-butanediol in a gaseous phase in the presence of a catalyst, reaction is carried out in the presence of a catalyst containing copper and chromium and in the presence of hydrogen, and gamma -butyrolactone is...

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Hauptverfasser:	KOBAYASHI, KENJI, IRUMA-GUN, SAITAMA-KEN, JP, UENO, HIROSHI, HIKI-GUN, SAITAMA-KEN, JP, SUZUKI, SADAKATSU, IRUMA-GUN, SAITAMA-KEN, JP, ICHIKI, TATSUMI, IRUMA-GUN, SAITAMA-KEN, JP
Format:	Patent
Sprache:	ger
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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Zusammenfassung:	In a process for the preparation of gamma -butyrolactone by catalytically dehydrogenating 1,4-butanediol in a gaseous phase in the presence of a catalyst, reaction is carried out in the presence of a catalyst containing copper and chromium and in the presence of hydrogen, and gamma -butyrolactone is separated from a reaction mixture and the residual part is recycled as such in a feed. The activity, selectivity or life of the catalyst is not adversely affected by recycled impurities, and some of impurities are decomposed by the catalyst.