Exxonmobil Chemical Patents Inc.

Jeremy W Bedard

Larry Lee Iaccino

Wenyih Frank Lai

Jane C Cheng

Xiaoying Bao

Wenyih F Lai

Tilman W Beutel

Robert T Carr

Karl Gottlieb Strohmaier

Doron Levin

Chuansheng Bai

Machteld M W Mertens

William R Gunther

Christopher M Evans

Jocelyn A Kowalski

Jocelyn A Gilcrest

Maria Milina

Nitish Mittal

Andrew P Palermo

Karl G Strohmaier

A catalyst comprising a microporous crystalline metallosilicate having a Constraint Index of 12, or 10, or 8, or 6 or less, a binder, a Group 1 alkali metal or a compound thereof and/or a Group 2 alkaline earth metal or a compound thereof, a Group 10 metal or a compound thereof, and, optionally, a Group 11 metal or a compound thereof; wherein the catalyst is calcined in a first calcining step before the addition of the Group 10 metal or compound thereof and optionally the Group 11 metal or compound thereof; and wherein the first calcining step includes heating the catalyst to first temperatures of greater than 500&#xb0; C.; and wherein the catalyst is calcined in a second calcining step after the addition of the Group 10 metal or compound thereof and optionally the Group 11 metal or compound thereof wherein the second calcining step includes heating the catalyst to temperatures of greater than 400&#xb0; C.

Calcination of microporous molecular sieve catalysts

Disclosed are processes for rejuvenating catalysts comprising at least one Group 10 metal and a microporous crystalline metallosilicate, and hydrocarbon conversion processes including such rejuvenation processes. In an aspect, the rejuvenation process comprises contacting a deactivated catalyst comprising at least one Group 10 metal and a microporous crystalline metallosilicate with an oxygen-containing gaseous stream under conditions comprising a temperature ranging from about 250&#xb0; C. to about 375&#xb0; C. and a pressure of up to about 100 bar. In a further aspect, the rejuvenation process comprises contacting a deactivated catalyst comprising at least one Group 10 metal, at least one rare earth metal, and a microporous crystalline metallosilicate with an oxygen-containing gaseous stream under conditions comprising a temperature ranging from about 250&#xb0; C. to about 500&#xb0; C. and a pressure of up to about 100 bar.

Processes for rejuvenating catalysts

Disclosed are processes for regenerating catalysts comprising at least one Group 10 metal and a microporous crystalline aluminosilicate having a having a molar ratio of Group 10 metal to Al of greater than or equal to about 0.007:1, and hydrocarbon conversion processes including such regeneration processes. In an aspect, the regeneration processes comprise an oxychlorination step comprising contacting the catalyst with a first gaseous stream comprising a chlorine source and an oxygen source under conditions effective for dispersing at least a portion of the at least one Group 10 metal on the surface of the catalyst and for producing a first Group 10 metal chlorohydrate. The processes further comprise a chlorine stripping step comprising contacting the catalyst with a second gaseous stream comprising an oxygen source, and optionally a chlorine source, under conditions effective for increasing the O/Cl ratio of the first Group 10 metal chlorohydrate to produce a second Group 10 metal chlorohydrate.

Processes for regenerating catalysts

Disclosed is a process for the conversion of acyclic Cfeedstock to a product comprising cyclic Ccompounds, including cyclopentadiene, and formulated catalyst compositions for use in such process. The process comprises contacting the feedstock and, optionally, hydrogen under acyclic Cconversion conditions in the presence of a catalyst composition to form the product. The catalyst composition comprises a microporous crystalline metallosilicate, a Group 10 metal or compound thereof, a binder, optionally, a metal selected from the group consisting of rare earth metals, metals of Groups 8, 9, or 11, mixtures or combinations thereof, or a compound thereof, in combination with a Group 1 alkali metal or a compound thereof and/or a Group 2 alkaline earth metal or a compound thereof.

Process for conversion of acyclic Ccompounds to cyclic Ccompounds and formulated catalyst compositions used therein

Disclosed is a process for the conversion of acyclic Cfeedstock to a product comprising cyclic Ccompounds, such as for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprising the steps of contacting said feedstock and, optionally, hydrogen under acyclic Cconversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a crystalline aluminosilicate having a constraint index of less than or equal to 5, and a Group 10 metal, and, optionally, a Group 11 metal, in combination with a Group 1 alkali metal and/or a Group 2 alkaline earth metal.

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Disclosed is a process for the conversion of acyclic Cfeedstock to a product comprising cyclic Ccompounds, such as, for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprises the steps of contacting said feedstock and, optionally, hydrogen under acyclic Cconversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a microporous crystalline aluminosilicate having a constraint index in the range of 3 to 12, a Group 10 metal, and, optionally, a Group 11 metal, in combination with a Group 1 alkali metal and/or a Group 2 alkaline earth metal.

Disclosed is a process for the conversion of acyclic Cfeedstock to a product comprising cyclic Ccompounds, including cyclopentadiene, and catalyst compositions for use in such process. The process comprises contacting the feedstock and, optionally, hydrogen under acyclic Cconversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprises a microporous crystalline metallosilicate, a Group 10 metal or compound thereof, and a Group 11 metal or compound thereof.

Disclosed is a process for the conversion of acyclic Cfeedstock to a product comprising cyclic Ccompounds, such as for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprising the steps of contacting said feedstock and, optionally, hydrogen under acyclic Cconversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprising a microporous crystalline ferrosilicate, a Group 10 metal, and, optionally, a Group 11 metal, in combination with an optional Group 1 alkali metal and/or an optional Group 2 alkaline earth metal.

Disclosed is a process for the conversion of acyclic Cfeedstock to a product comprising cyclic Ccompounds, such as for example, cyclopentadiene, and catalyst compositions for use in such process. The process comprising the steps of contacting said feedstock and, optionally, hydrogen under acyclic Cconversion conditions in the presence of a catalyst composition to form said product. The catalyst composition comprises a Group 10 metal, and, optionally, a Group 11 metal, on a catalyst support with a Group 1 alkali metal silicate and/or a Group 2 alkaline earth metal silicate.

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Houston, TX, United States of America

Jeremy W Bedard