PREPARATION OF BUTADIENE BY OXIDATIVE DEHYDROGENATION OF N-BUTENE AFTER PRIOR ISOMERIZATION

The invention relates to a method for preparing 1,3-butadiene by heterogeneously catalyzed oxidative dehydrogenation of n-butene, wherein a butene mixture is provided that contains at least 2-butene. The problem addressed by the invention is to provide a method for economic production of 1,3-butadie...

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Bibliographische Detailangaben
Hauptverfasser:	PEITZ, STEPHAN, GARTNER, FELIX, ZANTHOFF, HORST-WERNER, BUSCH, OLIVER MARKUS, GEILEN, FRANK, STOCHNIOL, GUIDO, REINSDORF, ARNE, SCHALLENBERG, JORG, PRODAN, NATALYA
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to a method for preparing 1,3-butadiene by heterogeneously catalyzed oxidative dehydrogenation of n-butene, wherein a butene mixture is provided that contains at least 2-butene. The problem addressed by the invention is to provide a method for economic production of 1,3-butadiene on a large industrial scale, being provided with a butene mixture as raw material having a 1-butene content therein that is relatively low in comparison to the 2-butene content and wherein the ratio of 1-butene to 2-butene is subject to fluctuations. The solution to this problem is achieved by a two-step procedure, wherein in a first step the provided butene mixture is subjected to a heterogeneously catalyzed isomerization, obtaining an at least partially isomerized butene mixture, and wherein subsequently in a second step the at least partially isomerized butene mixture obtained in the first step is subjected to oxidative dehydrogenation. The two-step process results in higher butadiene yields compared to the one-step process.