The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2009
Filed:
Dec. 30, 2004
Thorsten Johann, Limburgerhof, DE;
Götz-peter Schindler, Mannheim, DE;
Andreas Brodhagen, Dannstadt-Schauernheim, DE;
Sven Crone, Limburgerhof, DE;
Regina Benfer, Altrip, DE;
Thomas Hill, Ludwigshafen, DE;
Mark Duda, Ludwigshafen, DE;
Thorsten Johann, Limburgerhof, DE;
Götz-Peter Schindler, Mannheim, DE;
Andreas Brodhagen, Dannstadt-Schauernheim, DE;
Sven Crone, Limburgerhof, DE;
Regina Benfer, Altrip, DE;
Thomas Hill, Ludwigshafen, DE;
Mark Duda, Ludwigshafen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The disclosure relates to a process for preparing butadiene. The process involves nonoxidatively catalytically dehydrogenating butane to obtain a product gas stream containing butane, 1-butene, 2-butene, butadiene, hydrogen and secondary constituents. The 1-butene and 2-butene of the product gas stream is then oxidatively dehydrogenated to give a second gas stream containing butane,2-butene, butadiene, hydrogen, steam and secondary constituents. Next, the butane,2-butene and butadiene are separated from the second gas stream and the butane and 2-butene are then separated from the butadiene product. The butane and 2-butene are then recycled into the nonoxidative catalytic dehydrogenating zone.