Exxonmobil Chemical Patents Inc.

Exxonmobil Research and Engineering Company

Thomas Elmer Green

Gabor Kiss

Tan-Jen Chen

Stuart Leon Soled

Sabato Miseo

Terry Eugene Helton

Joseph Ernest Baumgartner

Michael P Lanci

Javier Guzman

Lei Zhang

Gary Paul Schleicher

Christine Esther Kliewer

William Anthony Lamberti

Tracie L Owens

Kanmi Mao

William C Horn

Lukasz Koziol

Keith Holroyd Kuechler

Christopher Lynn Becker

Xiaochun Xu

Methods are provided for modifying hydrogenation catalysts having silica supports (or other non-alumina supports) with additional alumina, and using such catalysts to achieve unexpectedly superior hydrogenation of feedstocks. The modified hydrogenation catalysts can have a relatively low cracking activity while providing an increased activity for hydrogenation.

Method and system for producing low aromatic hydrocarbon products

Noble metal hydrogenation catalysts and aromatic saturation methods

Noble metal hydrogenation catalysts with low cracking activity

Disclosed is a hydroalkylation process in which the hydroalkylation catalyst is activated in the presence of a flowing fluid comprising hydrogen and a condensable agent. The presence of the condensable agent enables fast, effective activation of the hydroalkylation catalyst precursor in a cost-effective manner. It also yields superior catalyst performance.

Hydroalkylating process comprising an activation of the hydroalkylation catalyst and method of making phenol and cyclohexanone

A process for activating a hydroalkylation catalyst in a first state comprising an acid component and a hydrogenating metal component, including: (i) treatment at a temperature of at least 120&#xb0; C. in the presence of hydrogen for a first duration to produce a catalyst in a second state having a first hydroalkylation activity; (ii) contacting the catalyst in the second state with an aromatic compound and hydrogen under a hydroalkylation condition effective to convert at least part of the aromatic compound to a cycloalkylaromatic compound and produce a catalyst in a third state; and (iii) treating the catalyst in the third state at a temperature of at least 160&#xb0; C. in the presence of hydrogen but advantageously in the substantial absence of the aromatic compound for a third duration to produce an activated catalyst in a fourth state having a third hydroalkylation activity greater than the first hydroalkylation activity.

Activation and use of hydroalkylation catalysts

A process for producing an alkylated aromatic compound comprises contacting an aromatic starting material and hydrogen with a plurality of catalyst particles under hydroalkylation conditions to produce an effluent comprising the alkylated aromatic compound, the catalyst comprising a composite of a solid acid, an inorganic oxide different from the solid acid and a hydrogenation metal, wherein the distribution of the hydrogenation metal in at least 60 wt % of the catalyst particles is such that the average concentration of the hydrogenation metal in the rim portion of a given catalyst particle is Crim, the average concentration of the hydrogenation metal in the outer portion of a given catalyst particle is Couter, the average concentration of the hydrogenation metal in the center portion of the given catalyst particle is Ccenter, where Crim/Ccenter&#x2267;2.0 and/or Couter/Ccenter2.0. Also disclosed are rimmed catalyst and process for making phenol and/or cyclohexanone using the catalyst.

Process for making alkylated aromatic compound

In a process for activating a hydroalkylation catalyst, a catalyst precursor comprising a solid acid component and a compound of a hydrogenation metal is heated at a heating rate of less than 50&#xb0; C./hour in the presence of hydrogen to an activation temperature in a range from 100&#xb0; C. to 260&#xb0; C. and then the heated catalyst precursor is treated with hydrogen for a duration effective to reduce at least a portion of the metal compound to an elemental form.

A process for producing an alkylated aromatic compound comprises contacting an aromatic starting material and hydrogen with a plurality of catalyst particles under hydroalkylation conditions to produce an effluent comprising the alkylated aromatic compound, the catalyst comprising a composite of a solid acid, an inorganic oxide different from the solid acid and a hydrogenation metal, wherein the distribution of the hydrogenation metal in at least 60 wt % of the catalyst particles is such that the average concentration of the hydrogenation metal in the rim portion of a given catalyst particle is Crim, the average concentration of the hydrogenation metal in the center portion of the given catalyst particle is Ccenter, where 0.2&#x2266;Crim/Ccenter&#x3c;2.0. Also disclosed are hydroalkylation catalyst and process for making phenol and/or cyclohexanone using the catalyst.

Disclosed are a catalyst comprising (A) an aluminosilicate molecular sieve comprising a ferrierite phase and (B) a hydrogenation metal component, and a hydroalkylation process using the catalyst. The catalyst and the hydroalkylation process can be used in the production of phenol and/or cyclohexanone from benzene hydroalkylation.

Hydroalkylating process

Growing community of inventors

Hamilton, NJ, United States of America

Thomas Elmer Green