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:
Dec. 02, 2008
Filed:
Feb. 20, 2002
Johannes A. Lercher, Ottobrunn, DE;
Andreas Feller, München, DE;
Stefan Gaab, Burgberg im Allgäu, DE;
Johannes A. Lercher, Ottobrunn, DE;
Andreas Feller, München, DE;
Stefan Gaab, Burgberg im Allgäu, DE;
Sud-Chemie AG, Munich, DE;
Abstract
A catalyst for acid-catalyzed hydrocarbon conversions, in particular for the alkylation of olefins with isoparaffins, containing a crystalline zeolite with an SiO—AlOmolar ratio of <10, the alkali cations of which are at least partially replaced by Hions and/or polyvalent cations, the residual concentration of alkali cations amounting to less than around 0.2% by weight, the concentration of the Bronsted centers, determined as a function of the pyridine chemisorbed on the catalyst surface, amounting to around 0.1 to 4 mmol/g of catalyst, and the ratio between the concentration of the acid centers of the Bronsted type (B) and of the Lewis type (L), expressed as the surface ratio of the absorption bands at 1540 ±5 cm(B) and 1450 5 cm(L) after heating to a temperature of 450° C amounting to around 1.4 or higher, is described.