Abstract: This invention relates to a process for the dehydrogenation of C.sub.2 -C.sub.10 hydrocarbons at dehydrogenation conditions with a pillared mica catalyst which contains an active metal selected from the group consisting of Pt, Cr and mixtures thereof, and a first modifier metal selected from the group consisting of Sn, Ga and mixtures thereof. The micas may also contain a second modifier metal selected from the group consisting of alkali metals, alkaline earth metals, and rare earth metals, and mixtures thereof.
Type:
Grant
Filed:
August 26, 1992
Date of Patent:
November 2, 1993
Assignee:
Exxon Research and Engineering Company
Inventors:
Michael C. Kerby, Kenneth L. Riley, Fred M. Long, Jack W. Johnson, John F. Brody
Abstract: A supported catalyst and a method of making a supported catalyst useful in the dehydrogenation of light paraffins. This catalyst comprises 0.3 to 5 wt. % Ga and 0.1 to 5 wt. % Pt on a spinel type support material characterized by the formula Mg.sub.x Al.sub.2 O.sub.3+x where x is a number from about 0.1 to 1.1. The improvement comprises the incorporation of a water soluble Mg salt into said support prior to the impregnation of Pt and Ga.
Abstract: A process for the dehydrogenation of light alkanes which employs a gallium/platinum catalyst on a magnesium/alumina spinel support. The catalyst comprises 0.3 to 5 wt. % Ga and 0.1 to 5 wt. % Pt on a spinel type support material characterized by the formula Mg.sub.x Al.sub.2 O.sub.3+x where x is a number from about 0.1 to 1.1. A water soluble Mg salt is incorporated into this support prior to the impregnation of Pt and Ga.
Abstract: Disclosed is a process for catalytically reforming a gasoline boiling range hydrocarbonaceous feedstock. The reforming is conducted in multiple stages with heavy aromatics removal between the first and second stages.
Type:
Grant
Filed:
August 19, 1991
Date of Patent:
April 20, 1993
Assignee:
Exxon Research & Engineering Company
Inventors:
George A. Swan, III, James P. Bailor, David W. Staubs, Eduardo Mon
Abstract: A catalytic cracking process is provided in which a zeolitic cracking catalyst having the structure of faujasite is first regenerated, then coked at a high catalyst to hydrocarbon weight ratio, and, subsequently utilized to crack a hydrocarbon feed boiling from about 430.degree.F. to 1050.degree. F. at a lower catalyst to hydrocarbon feed ratio.
Type:
Grant
Filed:
April 10, 1991
Date of Patent:
October 27, 1992
Assignee:
Exxon Research and Engineering Company
Inventors:
Ian A. Cody, Gordon F. Stuntz, William G. McKnight
Abstract: A process for removing heteroatoms from a hydrocarbonaceous feedstock using a catalyst composition comprised of: about 0.005 to 5.0 wt. % noble metal, about 0.5 to 5 wt. % of at least one Group VIII metal, and about 3 to 18 wt. % of a Group VI metal, and a refractory support, wherein the noble metal is incorporated into the refractory support by use of a precursor represented by ML.sub.2 when the noble metal is Pt or Pd, and ML.sub.3, when the noble metal is Rh or Ir, where M is the noble metal and L is a ligand selected from the dithiocarbamates, dithiophosphates, dithiophosphinates, xanthates, thioxanthates, and further wherein L has organo groups having a sufficient number of carbon atoms to render the noble metal complex soluble in oil.
Type:
Grant
Filed:
December 18, 1990
Date of Patent:
October 6, 1992
Assignee:
Exxon Research and Engineering Company
Inventors:
Gophal H. Singhal, William E. Winter, Jr., Kenneth L. Riley, Kenneth L. Trachte
Abstract: Tin modified platinum-iridium catalysts provide high yields of C.sub.5 + liquid reformate in catalytic reforming, concurrent with high activity. In particular, the tin modified platinum-iridium catalysts are of unusually high selectivity, as contrasted with known iridium promoted platinum catalysts. The high selectivity is manifested in reforming a naphtha feed in a reactor charged to capacity with the catalyst, but particularly when used in the dehydrocyclization zone, or tail reactor of a series of reactors, while the lead reactors of the series contain a non tin-containing platinum catalyst, especially a platinum-iridium, or a platinum-rhenium catalyst. The tin modified platinum-iridium catalysts are also highly active, with only moderate loss in the high activity for which iridium stabilized platinum catalysts are known.
Type:
Grant
Filed:
December 14, 1990
Date of Patent:
April 21, 1992
Assignee:
Exxon Research and Engineering Company
Inventors:
William C. Baird, Jr., George A. Swan, III, Joseph P. Boyle
Abstract: Disclosed is a catalyst composition for reforming a naphtha feed, which composition is composed of the metals, platinum, rhenium, and iridium on a refractory porous inorganic oxide support material, wherein the concentration of each of the metals platinum and rhenium is at least 0.1 percent and iridium at least 0.15 percent, and at least one of the metals is present in a concentration of at least 0.3 percent, and the sum-total concentration of the metals is greater than 0.9 percent.
Abstract: An improved hydroconversion process for carbonaceous materials wherein a dihydrocarbyl substituted dithiocarbamate of a metal selected from any one of Groups IV-B, V-A, VI-A, VII-B, and VIII-A of the Periodic Table of Elements or a mixture thereof is used as a catalyst precursor. The improved process is effective for both normally solid and normally liquid carbonaceous materials and for carbonaceous materials which are either solid or liquid at the conversion conditions. The hydroconversion will be accomplished at a temperature within the range from about 500.degree. to about 900.degree. F., at a total pressure within the range from about 500 to 7000 psig and at a hydrogen partial pressure within the range from about 400 to about 5000 psig.
Type:
Grant
Filed:
May 8, 1984
Date of Patent:
November 12, 1991
Assignee:
Exxon Research & Engineering Company
Inventors:
Gopal H. Singhal, Bobby L. Wilson, Edward H. Edelson, Michael A. Mikita