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. 26, 1999
Filed:
Jul. 24, 1997
Franz Nierlich, Marl, DE;
Paul Olbrich, Haltern, DE;
Wilhelm Droste, Marl, DE;
Richard Mueller, Marl, DE;
Walter Toetsch, Marl, DE;
Huels Aktiengesellschaft, Marl, DE;
Abstract
The invention relates to a process for preparing di-n-butene and alkyl tertbutyl ethers in a coupled production from field butanes, which indicates (a) separating the field butanes 1 into n-butane and isobutane in the separation stage 4, (b) dehydrogenating the n-butane 5 in a dehydrogenation stage 6 to give an n-butene-containing dehydrogenation mixture 7, oligomerizing the n-butene in the oligomerization stage 10 to give an oligomer mixture 11 and separating di-n-butene 12 off from this, and (c) de-hydrogenating the isobutane 15 in the dehydrogenation stage 16 to give an isobutene-containing dehydrogenation mixture 17 and reacting the isobutene with an alkanol 20 in the etherification stage 19 to give an alkyl tert-butyl ether 21. In an advantageous embodiment, the field butanes 1, prior to entry into the separation stage 4, are subjected to hydrogenation conditions in the hydrogenation stage 2 and an isomerization stage 3 is assigned to the separation stage 4, by means of which isomerization stage the ratio of n-butane to isobutane is set in accordance with the desired ratio of alkyl tertbutyl ether to di-n-butene.