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:
Feb. 26, 2008
Filed:
Jun. 07, 2004
Jannetje Maatje Van Den Berge, Oostvoorne, NL;
Gary David Mohr, League City, TX (US);
Kenneth Ray Clem, Humble, TX (US);
Wilfried Jozef Mortier, Kessel-lo, BE;
Machteld Maria Mertens, Boortmeerbeek, BE;
Michael C. Bradford, Waltham, MA (US);
Jannetje Maatje van den Berge, Oostvoorne, NL;
Gary David Mohr, League City, TX (US);
Kenneth Ray Clem, Humble, TX (US);
Wilfried Jozef Mortier, Kessel-lo, BE;
Machteld Maria Mertens, Boortmeerbeek, BE;
Michael C. Bradford, Waltham, MA (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
There is provided a coated zeolite catalyst in which the accessibility of the acid sites on the external surfaces of the zeolite is controlled and a process for converting hydrocarbons utilizing the coated zeolite catalyst. The zeolite catalyst comprises core crystals of a first zeolite and a discontinuous layer of smaller size second crystals of a second zeolite which cover at least a portion of the external surface of the first crystals The coated zeolite catalyst finds particular application in hydrocarbon conversion processes where catalyst activity in combination with zeolite structure are important for reaction selectivity, e.g., catalytic cracking, alkylation, disproportional of toluene, isomerization, and transalkylation reactions.