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. 13, 2009
Filed:
Dec. 16, 2004
Arthur W. Chester, Cherry Hill, NJ (US);
Hye Kyung Cho Timken, Woodbury, NJ (US);
Terry G. Roberie, Ellicott City, MD (US);
Michael S. Ziebarth, Columbia, MD (US);
Arthur W. Chester, Cherry Hill, NJ (US);
Hye Kyung Cho Timken, Woodbury, NJ (US);
Terry G. Roberie, Ellicott City, MD (US);
Michael S. Ziebarth, Columbia, MD (US);
W. R. Grace & Co. - Conn., Columbia, MD (US);
Abstract
The sulfur content of liquid cracking products, especially the cracked gasoline, of the catalytic cracking process is reduced by the use of a sulfur reduction additive comprising a porous molecular sieve which contains a metal in an oxidation state above zero within the interior of the pore structure of the sieve. The molecular sieve is normally a large pore size zeolite such as USY or zeolite beta or an intermediate pore size zeolite such as ZSM-. The metal is normally a metal of Period 3 of the Periodic Table, preferably zinc or vanadium. The sulfur reduction catalyst may be used in the form of a separate particle additive or as a component of an integrated cracking/sulfur reduction catalyst.