Mobil Oil Corporation

Exxonmobil Oil Corporation

Other

Sharon B McCullen

Jeffrey S Beck

David H Olson

Nai Y Chen

James C Vartuli

Thomas F Degnan

David Lawrence Stern

David O Marler

Kirk D Schmitt

Rudolph M Lago

Charles T Kresge

Stephen S Wong

Bruce P Pelrine

David C Calabro

Clarence D Chang

Scott S Han

Wieslaw J Roth

Jane C Cheng

Paul G Rodewald, Jr

Tracy J Huang

Chaya R Venkat

Brent A Aufdembrink

Stephen Harold Brown

Ralph M Dessau

William E Garwood

David S Shihabi

Cynthia T-w Chu

Stephen M Oleck

Randall D Partridge

Ying-Yen P Tsao

Hans J Schoennagel

Sandeep Singh Dhingra

John D Lutner

William S Borghard

George H Hatzikos

Jeevan S Abichandani

Timothy F Kinn

Y Y Tsao

There is provided a substantially binder-free catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The catalyst may be used in a hydrocarbon conversion process, such as toluene disproportionation.

Binderless ex situ selectivated zeolite catalyst

Incorporation of zirconium, nickel and/or copper into M41S results in selective sorption of bulky organic molecules. Zirconium, nickel and/or copper may be incorporated into M41S by exchange or impregnation.

Selective sorption of organics by metal-containing M41S

A method of preparing a modified catalytic molecular sieve for enhanced shape selective hydrocarbon conversions in which a catalytic molecular sieve is modified by being exposed to at least one ex situ selectivation sequence, each sequence including an impregnation of the molecular sieve with a selectivating agent in an aqueous emulsion and a subsequent calcination of the impregnated molecular sieve. The selectivating agent compositions for the ex situ selectivation method are also described, including the selectivating agents, the surfactants, and the aqueous components. Also, a method for moderate steaming of the ex situ selectivated molecular sieve. Also a method for in situ trim-selectivating the ex situ selectivated catalytic molecular sieve. Also described is the modified catalytic molecular sieve modified by this method. Also described is a process for shape selective hydrocarbon conversion comprising contacting a hydrocarbon feedstream under conversion conditions with the modified catalytic molecular sieve.

Method of preparation of ex situ selectivated zeolite catalysts for

There is provided a process for the alkylation of toluene with ethylene to selectively produce para-ethyltoluene over a catalyst which has been selectivated by multiple treatments with a siliceous material.

Toluene alkylation with ethylene to produce para-ethyloluene

A process for ethylbenzene production that involves contacting a hydrocarbon feedstream including benzene and ethylene, under alkylation conditions, with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two selectivation sequences, each selectivation sequence comprising contacting the catalyst with a silicon compound followed by calcination. The modified catalyst used in the process may also be steamed. Optionally, the modified catalyst may be trim-selectivated.

Ethylbenzene production process with ex situ selectivated zeolite

There is provided a process for shape selective toluene disproportionation that involves contacting a feedstream which includes toluene under conversion conditions, with ZSM-5 that has been selectivated at least once with an organosilicon selectivating agent. The conversion conditions of the hydrocarbon conversion process provide a toluene conversion of at least 40 wt. %.

High conversion touluene disproportionation with ex situ selectivated

An ex situ selectivated catalytic molecular sieve for enhanced shape selective hydrocarbon conversions in which a catalytic molecular sieve is modified by being exposed to at least two selectivation sequences, each sequence including an impregnation of the molecular sieve with a selectivating agent and a subsequent calcination of the impregnated molecular sieve. The ex situ selectivation method is also described, including the use of low volatility organic carriers for the selectivating agent. Also, a method for moderate steaming of the ex situ selectivated molecular sieve. Also a method for in situ trim-selectivating the ex situ selectivated catalytic molecular sieve. Also described is the process for shape selective hydrocarbon conversion comprising contacting a hydrocarbon feedstream under conversion conditions with the modified catalytic molecular sieve.

Enhanced shape selective applications and methods to increase the

A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedsteam under conversion conditions with a modified catalytic molecular sieve which has been modified by being pre-selectivated with a first silicon source, then steamed. The feedstream may also contain a second silicon source which is a high efficiency para-xylene selectivating agent. The method for modifying the molecular sieve is also described.

Method for modifying a catalyst

A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedstream under conversion conditions with a catalytic molecular sieve which has been modified by treatment with an amino silane polymer while molecular sieve acid sites are protected. When the process is toluene disproportionation, a toluene feedstream may also contain a second silicon source which is a high p-xylene selectivating agent. The invention also includes the modification method and the shape selective catalyst which results from the modification.

Catalyst modification for shape selective hydrocarbon conversions

There is provided a process for the alkylation of ethylbenzene with ethylene to selectively produce para-diethylbenzene over a catalyst which has been selectivated by multiple treatments with a siliceous material.

Ethylbenzene alkylation with ethylene to produce para-diethylbenzene

A ex situ selectivated catalytic molecular sieve for enhanced shape selective hydrocarbon conversions in which a catalytic molecular sieve is modified by being exposed to at least two selectivation sequences, each sequence including an impregnation of the molecular sieve with a selectivating agent and a subsequent calcination of the impregnated molecular sieve. The ex situ selectivation method is also described, including the use of aqueous carriers for the selecting agent. Also a method for in situ trim-selectivating the modified catalytic molecular sieve. Also, a method for moderate steaming of the selectivated molecular sieve. Also a method for in situ trim-selectivating the modified catalytic molecular sieve. Also described is the process for shape selective hydrocarbon conversion comprising contacting a hydrocarbon feedstream under conversion conditions with the selectivated molecular sieve.

Multiple impregnation technique for the preparation of ex situ

A process for shape selective hydrocarbon conversion that involves contacting a hydrocarbon feedsteam, including ethylbenzene, under conversion conditions with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The modified catalyst used in the process may also be steamed. Optionally, the modified catalyst may be trim-selectivated.

Selective ethylbenzene disproportionation processes (SEBDP) with ex situ

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Newtown, PA, United States of America

Sharon B McCullen