Exxon Research and Engineering Company

Allied Chemical Corporation

Omicron Technology Corporation

William E Gates

Stuart Leon Soled

Gary Brice McVicker

Sabato Miseo

Wim J Pieters

Enrique Iglesia

Emery J Carlson

Antonio Gutierrez

Shun Chong Fung

Kenneth L Riley

John L Robbins

Elise Marucchi-Soos

John E Wilkalis

Ming Chow

Rocco A Fiato

George M Kramer

Joseph P Boyle

Richard Harry Ernst

Franz Wenger

Sabato Niseo

Jose Agusto Paes

Jose Augusto Paes

William C Conner, Jr

The present invention relates to a catalyst composition, its methods of preparation and its use in aromatic alkylation processes. The composition comprises a heteropoly compound selected from the group consisting of heteropoly salts and heteropolyacid salts deposited in the interior of a porous support selected from the group consisting of silica, titania, and zirconia, wherein said salt of said heteropoly salt and said heteropolyacid salt is selected from the group consisting of ammonium, cesium, potassium, and rubidium salts and mixtures thereof, and wherein said heteropoly salt and said heteropolyacid salt are formed with a heteropolyacid selected from the group consisting of 12-tungstophosphoric, 12-tungstosilicic, 12-molybdophosphoric, and 12-molybdosilicic acid.

Heteropoly salts or acid salts deposited in the interior of porous

The invention is directed to a catalyst composition comprising a Group VIII metal, preferably a Group VIII noble metal, and a zirconia support impregnated with silica and tungsten oxide and its use in an isomerization process.

Group VIII metal containing tungsten oxide silica modified zirconia as

The present invention is directed to novel catalyst compositions, their preparation, and their use in a selective paraffin isomerization process. The solid acid catalyst compositions comprise a zirconium hydroxide support, a Group VIII metal, and a heteropolyacid selected from the group consisting of the exchanged aluminum salt of 12-tungstophosphoric acid, the exchanged salt of 12-tungstosilicic acid, and mixtures thereof. The use of said catalysts in an isomerization process comprises contacting said catalysts with a feed comprising C.sub.n or C.sub.n + paraffins, wherein n=4.

Zirconium hydroxide supported metal and heteropolyacid catalysts

By this invention there is provided a catalyst composition comprising a Group IVB oxide, an amorphous silica-alumina support having dispersed thereon a rare earth oxide, which as herein used also includes yttrium oxide, and a metal(s) selected from the group consisting of Group VIII noble metal(s), mixtures of Group VIII noble metal(s) and tin, mixtures of Group VIII noble metal(s) and rhenium, and mixtures of Group VIII noble metal(s), tin and rhenium. The amorphous silica-alumina support contains at least about 50% silica by weight. The catalyst can function as a hydrocarbon conversion catalyst in reactions where platinum on halided (Cl,F)-alumina is typically used.

Oxide addition to noble metal on rare earth modified silica alumina as

The present invention is directed to novel catalyst compositions, their preparation, and their use in a selective paraffin isomerization process. The solid acid catalyst compositions comprise a silica support, a Group VIII metal, and a heteropolyacid selected from the group consisting of 12-tungstophosphoric acid, 12-tungstosilicic acid, the exchanged aluminum salt of 12-tungstophosphoric acid, the exchanged aluminum salt of 12-tungstosilicic acid and mixtures thereof. The use of said catalysts in an isomerization process comprises contacting said catalysts with a feed comprising C.sub.n or C.sub.n + paraffins, wherein n=4.

Silica supported metal and heteropolyacid catalysts

Group IVB oxide addition to noble metal on rare earth modified silica

Rare earth oxides, such as Nd.sub.2 O.sub.3 disperse onto the surface of SiO.sub.2 /Al.sub.2 O.sub.3 and act as weakly basic titrants. This lowers the acidity of SiO.sub.2 /Al.sub.2 O.sub.3 to close to that of chlorided alumina, as shown by model compound reaction tests. This support also disperses a noble metal such as Pt much better than undoped SiO.sub.2 /Al.sub.2 O.sub.3 and similar to chlorided alumina. Platinum on the rare earth modified silica alumina can function as a hydrocarbon conversion catalyst in reactions where Pt/chlorided Al.sub.2 O.sub.3 is used, such as in reforming, and isomerization, especially wax isomerization.

Metal on rare earth modified silica alumina as hydrocarbon conversion

Noble metal on rare earth modified silica alumina as hydrocarbon

A process for isomerizing a paraffin feed comprising contacting the feed with a strong, solid acid catalyst comprising a sulfated Group IVB metal oxide and at least one Group VIII metal in the presence of hydrogen and an adamantane compound.

Isomerization of paraffins with strong solid acid catalyst and adamantane

A reforming process using a Supported Group VIII noble metal reforming catalyst which has been pretreated with an unsaturated aliphatic hydrocarbon at elevated temperatures, thereby lowering activity during initial reforming operations and reducing gas production during the initial operation.

Reforming process using a pretreated catalyst

Supported Group VIII noble metal reforming catalysts are pretreated with an unsaturated aliphatic hydrocarbon at elevated temperatures, thereby lower activity during initial reforming operation and reducing gas production during the initial operation.

Method for pretreating a reforming catalyst

New catalysts containing a Group VIII metal such as iron, a Group IIB metal, such as zinc, a Group IA alkali metal such as potassium, rubidium and/or cesium, and a lanthanide metal, such as cerium, exhibit improved productivity in synthesis of alpha-olefins from hydrogen rich synthesis gas.

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Somerset, NJ, United States of America

William E Gates