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:
Dec. 21, 1999
Filed:
Nov. 14, 1997
Gary A Ash, Kingwood, TX (US);
Nhu Q Dao, Richmond, CA (US);
Arnold J Gloyn, Walnut Creek, CA (US);
N J Haritatos, El Cerrito, CA (US);
Paul I Hodgen, Sugar Land, TX (US);
Stuart R MacPherson, Mobile, AL (US);
Scott Gordon Morrison, Petaluma, CA (US);
Gerald J Nacamuli, Mill Valley, CA (US);
Paul M Spindler, Kingwood, TX (US);
Bruce J Thom, Concord, CA (US);
Eric P Weber, Kingwood, TX (US);
Richard Wolpert, Berkeley, CA (US);
Chevron Chemical Company LLC, San Francisco, CA (US);
Abstract
A process is provided for producing high purity benzene and high purity paraxylene from a hydrocarbon feed. In one aspect, the process comprises: (a) reforming a hydrocarbon feed using either a monofunctional catalyst or a bifunctional catalyst to provide one or more reformate streams; (b) fractionating the reformate stream to provide a toluene stream, a benzene stream, and a xylene stream; (c) subjecting the toluene stream to disproportionation; (d) purifying the benzene stream by extraction followed by distillation to provide a high purity benzene product; and (e) purifying the xylene stream by simulated moving bed countercurrent adsorption followed by crystallization to provide a high purity paraxylene product.