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:
Mar. 02, 1993
Filed:
Mar. 31, 1991
Applicant:
Inventor:
Karl Z Steigleder, Glen Ellyn, IL (US);
Assignee:
UOP, Des Plaines, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
502 79 ; 502 86 ;
Abstract
The invention comprises a hydrogen form Y-zeolite having a unit cell size between about 24.20 Angstroms and 24.40 Angstroms, preferably 24.30 to 24.36 Angstroms, characterized by a low ammonia temperature programmed desorption (TPD) acidity strength value and a relatively high ion exchange capacity. This zeolite may be produced by dehydroxylation as by a dry calcination of a steam modified low sodium zeolite such as LZ-20 zeolite.