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:
Oct. 20, 1992
Filed:
Aug. 28, 1989
Mark A Drezdzon, Aurora, IL (US);
Eric J Moore, Carol Stream, IL (US);
Marc L Kullberg, Lisle, IL (US);
Amoco Corporation, Chicago, IL (US);
Abstract
Catalyzed vapor-phase processes are taught for the oxidative dehydrogenation of a lower-alkyl-monosubstituted ethylbenzene to a lower-alkyl-monosubstituted styrene. Barium pyrophosphate and the pyrophosphate-containing calcination product of KFe.sub.3 H.sub.14 (PO.sub.4).sub.8.nH.sub.2 O, n running between about 1 to about 4, are shown to effectively catalyze these dehydrogenations at a low enough temperature such that very little cracking of the lower alkyl group occurs which gives superior conversions and selectivities to the corresponding styrenes and lengthened catalyst lifetime. An improved method of preparation of KFe.sub.3 H.sub.14 (PO.sub.4).nH.sub.2 O is described as well as the new material which is essentially KFe.sub.3 H.sub.6 (P.sub.2 O.sub.7).sub.4.