April V Ross

US Patent:

20110263918, Oct 27, 2011

Filed:

Apr 6, 2011

Appl. No.:

13/081351

Inventors:

John Di-Yi Ou - Houston TX, US
April D. Ross - Beaumont TX, US
Doron Levin - Highland Park NJ, US
Mohan Kalyanaraman - Media PA, US
Wenyih Frank Lai - Bridgewater NJ, US

International Classification:

C07C 5/22
B01J 29/40
C01B 39/38

US Classification:

585481, 585477, 585480, 423700, 502 77, 502 71, 502 68

Abstract:

The invention concerns a xylenes isomerization process for the production of equilibrium or near-equilibrium xylenes. The process utilizes a catalyst comprising HZSM-5 or MCM-49 and process conditions including a temperature of less than 295 C. and a pressure sufficient to maintain the xylenes in liquid phase. In embodiments, the process can be operated in a continuous mode with ppm levels of dissolved Hin the feed and in other embodiments in a cyclic mode without the Hin feed but with periodic regenerations using a feed having low ppm levels of H.