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. 02, 1999
Filed:
Nov. 03, 1995
John Scott Buchanan, Trenton, NJ (US);
Jane C Cheng, Clarksburg, NJ (US);
David G Freyman, Kenner, LA (US);
Werner Otto Haag, Lawrenceville, NJ (US);
Mohsen N Harandi, Langhorne, PA (US);
Dominick N Mazzone, Wenonah, NJ (US);
Roger A Morrison, Lambertville, NJ (US);
Norman J Rouleau, Yardley, PA (US);
Charles M Sorensen, Wilmington, DE (US);
Hye Kyung Timken, Woodbury, NJ (US);
Robert Adams Ware, Wyndmoor, PA (US);
Mobil Oil Corporation, Fairfax, VA (US);
Abstract
This is a process for upgrading a petroleum naphtha fraction. The naphtha is subjected to reforming and the reformate is cascaded to a benzene and toluene synthesis zone over a benzene and toluene synthesis catalyst comprising a molecular sieve of low acid activity. The preferred molecular sieve is steamed ZSM-5. The benzene and toluene synthesis zone is operated under conditions compatible with the conditions of the reformer such as pressures of above about 50 psig (446 kPa) and temperatures above about 800.degree. F. (427.degree. C). In one aspect of the invention, the benzene and toluene synthesis catalyst includes a metal hydrogenation component such as cobalt, nickel, platinum or palladium. In one mode of operation, the benzene and toluene synthesis catalyst replaces at least a portion of the catalyst of the reformer. The process produces a product containing an increased proportion of benzene and toluene, and a reduced proportion of C8 aromatics, particularly ethylbenzenes, as compared to the reformate.