1
Ashim Kumar Ghosh, Neeta Kulkarni, Pamela Harvey, Roncalli J Twomey: Hydrothermal treatment of phosphorus-modified zeolite catalysts. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, Griggs Bergen, December 4, 2007: US07304194 (19 worldwide citation)

A method of treating a ZSM-5-type zeolite catalyst is carried out by treating a ZSM-5 zeolite catalyst having a silica/alumina mole ratio of at least about 200 with a phosphorus compound. The phosphorus-treated ZSM-5 zeolite catalyst is calcined and steamed. Steaming of the catalyst is carried out a ...


2
Ashim Kumar Ghosh, Gopalakrishnan Juttu, Pamela Harvey, Neeta Kulkarni: Method of modifying zeolite catalyst. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, October 23, 2007: US07285511 (17 worldwide citation)

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 provid ...


3
Ashim Kumar Ghosh, Neeta Kulkarni, Pamela Harvey: Toluene methylation process with increased methanol selectivity. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, Griggs Bergen, October 9, 2007: US07279608 (12 worldwide citation)

A method of converting methanol to a xylene product is achieved by providing a reactor containing a non-steamed, phosphorus-treated ZSM-5-type zeolite catalyst. The catalyst is contacted with a toluene/methanol feed under reactor conditions suitable for the methylation of toluene. Water cofeed is in ...


4
Ashim Kumar Ghosh, Neeta Kulkarni, Pamela Harvey: Zeolite catalyst and method of preparing and use of zeolite catalyst. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, Griggs Bergen, May 6, 2008: US07368410 (10 worldwide citation)

A zeolite catalyst is prepared by treating a zeolite with a phosphorus compound to form a phosphorus-treated zeolite. The phosphorus-treated zeolite is heated to a temperature of about 300° C. or higher and combined with an inorganic oxide binder material to form a zeolite-binder mixture. The zeolit ...


5
Ashim Kumar Ghosh, Neeta Kulkarni, Pamela Harvey: Zeolite catalyst and method. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, Griggs Bergen, July 15, 2008: US07399727 (7 worldwide citation)

A catalyst is formed from a phosphorus-containing ZSM-5-type zeolite. The ZSM-5-type zeolite has a silica/alumina molar ratio of at least 200. The phosphorus-containing ZSM-5-type zeolite also has a phosphorus content of at least 8% by weight of zeolite and has multiple phosphorus species exhibited ...


6
Ashim Kumar Ghosh, Pamela Harvey, Neeta Kulkarni: Bound phosphorus-modified zeolite catalyst, method of preparing and method of using thereof. Saudi Basic Industries Corporation, Jim Wheelington, February 16, 2010: US07662737 (6 worldwide citation)

Disclosed is a bound phosphorus-modified zeolite catalyst. Zeolite is treated with a phosphorus compound to form the phosphorus-treated zeolite. Binder material is treated with a mineral acid prior to being bound with the phosphorus-modified zeolite. The binder material includes inorganic oxide mate ...


7
Ashim Kumar Ghosh, Neeta Kulkarni, Pamela Harvey: Phosphorus-containing zeolite catalyst. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, Griggs Bergen, March 24, 2009: US07507685 (5 worldwide citation)

A zeolite catalyst is prepared by treating a zeolite with a phosphorus compound to form a phosphorus-treated zeolite. The phosphorus-treated zeolite is heated to a temperature of about 300° C. or higher and combined with an inorganic oxide binder material to form a zeolite-binder mixture. The zeolit ...


8
Ashim Kumar Ghosh, Neeta Kulkarni, Pamela Harvey, Roncalli J Twomey: Method of hydrothermal treatment of phosphorus-modified zeolite catalyts. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, Griggs Bergen, August 18, 2009: US07576026 (5 worldwide citation)

A method of treating a ZSM-5-type zeolite catalyst is carried out by treating a ZSM-5 zeolite catalyst having a silica/alumina mole ratio of at least about 200 with a phosphorus compound. The phosphorus-treated ZSM-5 zeolite catalyst is calcined and steamed. Steaming of the catalyst is carried out a ...


9
Ashim Kumar Ghosh, Neeta Kulkarni, Pamela Harvey: Method of preparing an alkyl aromatic product with phosphorus-treated zeolite catalyst. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, Griggs Bergen, March 9, 2010: US07674942 (4 worldwide citation)

A zeolite catalyst is prepared by treating a zeolite with a phosphorus compound to form a phosphorus-treated zeolite. The phosphorus-treated zeolite is heated to a temperature of about 300° C. or higher and combined with an inorganic oxide binder material to form a zeolite-binder mixture. The zeolit ...


10
Ashim Kumar Ghosh, Gopalakrishnan Juttu, Pamela Harvey, Neeta Kulkarni: Method of preparing a xylene product. Saudi Basic Industries Corporation, Grady K Bergen, Jim D Wheelington, Griggs Bergen, July 14, 2009: US07560608 (4 worldwide citation)

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 provid ...