August 26, 2013

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The following patent record is from the CAplusSM database.

CAPLUS COPYRIGHT 2013 ACS

Patent Number: US 8471083
Title: Production of para-xylene by reforming using high-silica zeolite catalysts
Inventor(s): Chen, Cong-Yan; Miller, Stephen J.; Ziemer, James N.; Liang, Ann J.
Patent Assignee(s): Chevron U.S.A. Inc., USA
Source: U.S. Pat. Appl. Publ., 12pp.; Chemical Indexing Equivalent to 156:206164 (WO) CODEN: USXXCO
Language: English

Abstract:
A process for producing p-xylene comprises (a) providing a C8-feedstock contg. at least 10% of C8-paraffinic hydrocarbons to a reforming reaction zone that contains a reforming catalyst comprising a medium pore zeolite having a silica to alumina mole ratio of at least 200, and a crystallite size of < 10 µm, (b) contacting the C8-feedstock under reforming reaction conditions in the reforming reaction zone to produce p-xylene and m-xylene at a p-xylene/m-xylene ratio of at least 0.9, and (c) sepg. p-xylene from m-xylene.  The process produces p-xylene at greater than thermodn. equil. concns.

Please note:  Abstracts and Titles for patent records in CAplus are routinely enhanced to better describe the claimed invention.

 View the full-text here.

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