07285511 is referenced by 17 patents and cites 178 patents.

A method of modifying a zeolite catalyst to increase para-xylene selectivity of the zeolite catalyst in toluene methylation reactions is provided. The method includes forming a slurry of a ZSM-5-type zeolite and an aqueous solution of a phosphorus compound. Water is removed from the slurry to provide a non-steamed, phosphorus treated ZSM-5 zeolite catalyst without deposition of phosphorus onto the catalyst by organophosphorus vapor deposition. The resulting non-steamed, phosphorus treated ZSM-5 zeolite catalyst has a pore volume of from 0.2 ml/g or less and provides greater than 80% para-xylene selectivity of mixed xylenes when used in toluene methylation.

Title
Method of modifying zeolite catalyst
Application Number
10/831729
Publication Number
7285511 (B2)
Application Date
April 23, 2004
Publication Date
October 23, 2007
Inventor
Neeta Kulkarni
Houston
TX, US
Pamela Harvey
Missouri City
TX, US
Gopalakrishnan Juttu
Sugar Land
TX, US
Ashim Kumar Ghosh
Houston
TX, US
Agent
Jim D Wheelington
Grady K Bergen
Assignee
Saudi Basic Industries Corporation
SA
IPC
B01J 29/06
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