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, 1993
Filed:
Nov. 01, 1991
Applicant:
Inventors:
Stephen H Brown, Princeton, NJ (US);
Roland von Ballmoos, Belle Mead, NJ (US);
Assignee:
Englehard Corporation, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
502 79 ; 502 22 ; 502 25 ; 502 64 ; 423709 ; 423D / ;
Abstract
A process for the reuse or recycling of FCC equilibrium catalysts is disclosed. The process involved treatment of a zeolite-containing equilibrium catalyst with clear seeds, a source of sodium oxide, a source of silica and water at elevated temperatures in order to destroy the Y originally present in the equilibrium catalyst and regrow zeolite Y in the pores of the matrix to a level no higher than 70 weight percent.