Patents by Inventor Waldeen C. Buss
Waldeen C. Buss has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4721694Abstract: A new catalyst is disclosed which is useful for dehydrocyclizing alkanes. This catalyst contains a type L zeolite, a Group VIII metal, and an alkaline earth metal. Preferably, this catalyst contains a type L zeolite, from 0.1% to 5% by weight platinum and from 1% to 20% by weight barium.Type: GrantFiled: July 24, 1986Date of Patent: January 26, 1988Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4721695Abstract: A new catalyst is disclosed which is useful for dehydrocyclizing alkanes. This catalyst contains a zeolite of the L family, a Group VIII metal, and an alkaline earth metal.Type: GrantFiled: July 24, 1986Date of Patent: January 26, 1988Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4680280Abstract: A reforming catalyst comprising a large-pore zeolite and at least one reforming catalytic metal selected from the group consisting of the Group VIII noble metals, having enhanced sulfur tolerance achieved by adding at least one desulfurization metal to the catalyst; and a reforming process having high selectivity for dehydrocyclization which comprises contacting a naphtha boiling in the gasoline boiling range and containing some acyclic hydrocarbons with the foregoing catalyst.Type: GrantFiled: March 15, 1985Date of Patent: July 14, 1987Assignee: Chevron Research CompanyInventors: Sue D. Pandey, Waldeen C. Buss
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Patent number: 4666876Abstract: A method of dehydrocyclizing alkanes is disclosed wherein the alkanes are contacted with a catalyst containing a large-pore zeolite, a Group VIII metal, and an alkaline earth metal wherein the Selectivity Index is greater than 60%.Type: GrantFiled: October 23, 1985Date of Patent: May 19, 1987Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4645586Abstract: A reforming process is disclosed wherein a hydrocarbon feed is contacted with two reforming catalysts at conditions which favor reforming. The first reforming catalyst comprises a metallic oxide support having disposed therein a Group VIII metal. This first reforming catalyst may contain Group VIII metal promoters, such as rhenium, tin, germanium, cobalt, nickel, iridium, rhodium, ruthenium and combinations thereof. The second reforming catalyst is a non-acidic catalyst comprising a large-pore zeolite containing at least one Group VIII metal. A preferred first reforming catalyst comprises alumina having disposed therein in intimate admixture platinum and rhenium. A preferred second reforming catalyst is a non-acidic catalyst comprising a type L zeolite containing platinum.Type: GrantFiled: December 7, 1984Date of Patent: February 24, 1987Assignee: Chevron Research CompanyInventor: Waldeen C. Buss
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Patent number: 4645588Abstract: A new catalyst is disclosed which is useful for dehydrocyclizing alkanes. This catalyst contains a zeolite of the L family, a Group VIII metal, and an alkaline earth metal.Type: GrantFiled: June 28, 1982Date of Patent: February 24, 1987Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4636298Abstract: A hydrocarbon conversion process is disclosed wherein the alkanes are contacted with a catalyst containing a metallic oxide support and a Group VIII metal, and with a catalyst containing a large-pore zeolite, a Group VIII metal, and an alkaline earth metal.Type: GrantFiled: December 7, 1984Date of Patent: January 13, 1987Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4634518Abstract: A new catalyst is disclosed which is useful for dehydrocyclizing alkanes. This catalyst contains a type L zeolite, a Group VIII metal, and an alkaline earth metal. Preferably, this catalyst contains a type L zeolite, from 0.1% to 5% by weight platinum and from 1% to 20% by weight barium.Type: GrantFiled: August 6, 1982Date of Patent: January 6, 1987Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4631123Abstract: A method of dehydrocyclizing alkanes is disclosed wherein the alkanes are contacted with a catalyst containing a large-pore zeolite, a Group VIII metal, and an alkaline earth metal wherein the Selectivity Index is greater than 60%.Type: GrantFiled: June 28, 1982Date of Patent: December 23, 1986Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4608356Abstract: A method of preparing a reforming catalyst is disclosed wherein a large-pore zeolite is impregnated with an aqueous solution of platinum and the zeolite is only allowed to soak in the solution for less than three hours to form a catalyst. After the catalyst is dried, it is calcined in an atmosphere containing steam.Type: GrantFiled: December 20, 1984Date of Patent: August 26, 1986Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Charles R. Wilson
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Patent number: 4539305Abstract: A pretreatment method is disclosed for enhancing the selectivity and increasing the stability of a reforming catalyst comprising a large-pore zeolite containing at least one Group VIII metal. In this method, the catalyst is reduced in reducing atmosphere at a temperature of from 250.degree. C. to 650.degree. C., exposed to an oxygen-containing gas, treated in a reducing atmosphere at from 120.degree. C. to 260.degree. C., and maintained at a temperature of from 370.degree. C. to 600.degree. C. in a reducing atmosphere.Type: GrantFiled: March 8, 1984Date of Patent: September 3, 1985Assignee: Chevron Research CompanyInventors: Charles R. Wilson, Waldeen C. Buss, Leslie A. Field
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Patent number: 4517306Abstract: A new catalyst is disclosed which is useful for dehydrocyclizing alkanes. This catalyst contains a type L zeolite, a Group VIII metal, and an alkaline earth metal. This catalyst has been reduced in a hydrogen atmosphere at a temperature of from 480.degree. C. to 620.degree. C.Type: GrantFiled: January 3, 1984Date of Patent: May 14, 1985Assignee: Chevron Research CompanyInventor: Waldeen C. Buss
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Patent number: 4507397Abstract: The process of oxidatively regenerating in situ a fixed bed hydrocarbon catalyst which is sensitive to reactive sulfur compounds in a conversion system having sulfur-contaminated vessels and/or conduits in the flow path upstream from said catalyst is improved by passing regenerating oxygen-containing gas first through the sulfur-contaminated vessels and/or conduits and then through the fixed catalyst bed while limiting the water content of the regenerating gas to a concentration of not more than 0.1 mol percent throughout the flow path and at a temperature in the range of 750.degree.-1100.degree. F. to oxidize the sulfur contaminants in the vessels and/or conduits upstream from the catalyst. Thereby the evolved sulfur oxides flow through the fixed bed catalyst in the absence of sufficient water which would promote reaction of sulfur oxides with the catalyst.Type: GrantFiled: July 28, 1983Date of Patent: March 26, 1985Assignee: Chevron Research CompanyInventor: Waldeen C. Buss
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Patent number: 4482637Abstract: A method is disclosed for regenerating reforming catalysts containing a platinum group component and/or rhenium component in association with a halogen component on a porous inorganic oxide, such as one containing alumina without significant displacement of the rhenium components by sulfur oxides generated during the regeneration process. The method is particularly characterized in that carbon is removed from the catalyst by in situ oxidation at temperatures not in excess of about 750.degree. F. and without modification of the catalytic reforming process flow circuit, as by disconnecting or isolating the heat exchangers and furnace tubes.Sulfide scale is converted in a separate oxidation step to sulfur dioxide, SO.sub.2, without substantial oxidation to sulfur trioxide, SO.sub.3, by maintaining the inner walls of the heat exchangers and furnace tubes, where such iron sulfides are present, at a temperature not in excess of about 900.degree. F. and not less than about 750.degree. F.Type: GrantFiled: August 4, 1982Date of Patent: November 13, 1984Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4456527Abstract: A hydrocarbon conversion process is disclosed having a very high selectivity for dehydrocyclization. In one aspect of this process, a hydrocarbon feed is subjected to hydrotreating, then the hydrocarbon feed is passed through a sulfur removal system which reduces the sulfur concentration of the hydrocarbon feed to below 500 ppb, and then the hydrocarbon feed is reformed over a dehydrocyclization catalyst comprising a large pore zeolite containing at least one Group VIII metal to produce aromatics and hydrogen.Type: GrantFiled: March 21, 1983Date of Patent: June 26, 1984Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Leslie A. Field, Richard C. Robinson
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Patent number: 4447316Abstract: A new catalyst is disclosed which is useful for dehydrocyclizing alkanes. This catalyst contains a type L zeolite, a Group VIII metal, and an alkaline earth metal. This catalyst has been reduced in a hydrogen atmosphere at a temperature of from 480.degree. C. to 620.degree. C.Type: GrantFiled: February 1, 1982Date of Patent: May 8, 1984Assignee: Chevron Research CompanyInventor: Waldeen C. Buss
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Patent number: 4435283Abstract: A method of dehydrocyclizing alkanes is disclosed wherein the alkanes are contacted with a catalyst containing a large-pore zeolite, a Group VIII metal, and an alkaline earth metal. The amount of Group VIII metal and the amount of alkaline earth metal present in the catalyst are adjusted so that the selectivity for n-hexane of the dehydrocyclization reaction is greater than 60%.Type: GrantFiled: February 1, 1982Date of Patent: March 6, 1984Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4434311Abstract: A method is disclosed for the dehydroisomerization of alkylcyclopentanes using a catalyst comprising a large-pore zeolite, a Group VIII metal, and an alkaline earth metal.Type: GrantFiled: September 20, 1982Date of Patent: February 28, 1984Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Thomas R. Hughes
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Patent number: 4238372Abstract: An improved catalyst, having a reduced fouling rate when used in a catalytic reforming process, said catalyst comprising platinum disposed on an alumina support wherein the alumina support is obtained by removing water from aluminum hydroxide produced as a by-product from a Ziegler higher alcohol synthesis reaction, and wherein the alumina is calcined at a temperature of 1100.degree.-1400.degree. F. so as to have a surface area of 165 to 215 square meters per gram.Type: GrantFiled: May 4, 1979Date of Patent: December 9, 1980Assignee: Chevron Research CompanyInventors: Waldeen C. Buss, Harris E. Kluksdahl
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Patent number: 4061592Abstract: A catalytic composition of matter comprising 0.01 to 5 weight percent of a platinum group component, 0.01 to 5 weight percent of a Group IIB component and 0.1 to 3 weight percent of a halogen in association with a porous solid carrier and processes for the hydroconversion of hydrocarbons using said catalyst.Type: GrantFiled: December 12, 1975Date of Patent: December 6, 1977Assignee: Chevron Research CompanyInventor: Waldeen C. Buss