Ashim Kumar Ghosh - Houston TX, US Neeta Kulkarni - Houston TX, US Pamela Harvey - Missouri City TX, US Roncalli J. Twomey - Houston TX, US
Assignee:
Saudi Basic Industries Corporation - Riyadh
International Classification:
B01J 29/06 B01J 29/40
US Classification:
502 77, 502 60
Abstract:
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 at a temperature of less than about 300 C. The phosphorus-treated ZSM-5 zeolite catalyst has less than 0. 05% by weight of the catalyst of any other element other than phosphorus provided from any treatment of the ZSM-5 zeolite with a compound containing said other element. The catalyst may be used in aromatic alkylation by contacting the catalyst with feed of an aromatic hydrocarbon and an alkylating agent within a reactor under reactor conditions suitable for aromatic alkylation. Water cofeed may be introduced water into the reactor during the aromatic alkylation reaction.
Hydrothermal Treatment Of Phosphorus-Modified Zeolite Catalysts
Ashim Ghosh - Houston TX, US Neeta Kulkarni - Houston TX, US Pamela Harvey - Missouri City TX, US Roncalli Twomey - Houston TX, US
International Classification:
B01J 29/00 B01J 29/04
US Classification:
502077000, 502085000
Abstract:
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 at a temperature of less than about 300 C. The phosphorus-treated ZSM-5 zeolite catalyst has less than 0.05% by weight of the catalyst of any other metal other than phosphorus provided from any treatment of the ZSM-5 zeolite with a compound containing said other metal. The catalyst may be used in aromatic alkylation by contacting the catalyst with feed of an aromatic hydrocarbon and an alkylating agent within a reactor under reactor conditions suitable for aromatic alkylation. Water cofeed may be introduced water into the reactor during the aromatic alkylation reaction.