Patents by Inventor Jerome H. Krekeler
Jerome H. Krekeler 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: 4260706Abstract: Olefin polymerization catalysts are prepared by depositing an organophosphoryl chromium product and an aluminum acetyl acetonate on an inorganic support material, and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree. C. up to the decomposition temperature of the support material.Type: GrantFiled: June 21, 1979Date of Patent: April 7, 1981Assignee: National Petro Chemicals Corp.Inventors: Louis J. Rekers, Stanley J. Katzen, Jerome H. Krekeler
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Patent number: 4234453Abstract: Olefin polymerization catalysts are prepared by depositing an organophosphoryl chromium product and an aluminum compound on an inorganic support material, and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree. C. up to the decomposition temperature of the support material.Type: GrantFiled: September 20, 1976Date of Patent: November 18, 1980Assignee: National Petro Chemicals CorporationInventors: Louis J. Rekers, Stanley J. Katzen, Jerome H. Krekeler
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Patent number: 4192775Abstract: Olefin polymerization catalysts are prepared by depositing an organophosphoryl chromium product and an aluminum acetyl acetonate on an inorganic support material, and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree. C. up to the decomposition temperature of the support material.Type: GrantFiled: July 17, 1978Date of Patent: March 11, 1980Assignee: National Petro Chemicals CorporationInventors: Louis J. Rekers, Stanley J. Katzen, Jerome H. Krekeler
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Patent number: 4184028Abstract: Olefin polymerization catalysts are prepared by depositing an organophosphoryl chromium product and an aluminum compound on an inorganic support material, and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree. C. up to the decomposition temperature of the support material.Type: GrantFiled: June 29, 1977Date of Patent: January 15, 1980Assignee: National Petro Chemicals CorporationInventors: Louis J. Rekers, Stanley J. Katzen, Jerome H. Krekeler
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Patent number: 4053565Abstract: Silica xerogels having pore volumes greater than about 2.0 cc/g., the major portion of which volumes are provided by pores having pore diameters ranging from 300 to 600 A, and surface areas ranging from 200 to 500 m.sup.2 /g. Xerogels having such cumulative pore volume, pore diameter distribution, and surface area characteristics are useful as supports for stereospecific catalysts for particle form olefin polymerization reactions effecting the production of low molecular weight, high melt index polyolefins.Type: GrantFiled: January 28, 1974Date of Patent: October 11, 1977Assignee: National Petro Chemicals CorporationInventors: Jerome H. Krekeler, William Kirch, Henri A. Aboutboul
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Patent number: 4049896Abstract: Olefin polymerization catalysts are prepared by depositing a chromium compound and an aluminum compound on an inorganic support material and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree. C up to the decomposition temperature of the support material. The supported chromium and aluminum compound is then combined with a metallic and/or non-metallic reducing agent, to provide a catalyst system useful in the polymerization of 1-olefins.Type: GrantFiled: August 20, 1976Date of Patent: September 20, 1977Assignee: National Petro Chemicals CorporationInventors: Louis J. Rekers, Stanley J. Katzen, Jerome H. Krekeler
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Patent number: 3984351Abstract: Olefin polymerization catalysts are prepared by depositing a chromium compound and an aluminum compound on an inorganic support material and heating the support material in a non-reducing atmosphere at a temperature above about 300.degree.C up to the decomposition temperature of the support material. The supported chromium and aluminum compound is then combined with a metallic and/or non-metallic reducing agent, to provide a catalyst system useful in the polymerization of 1-olefins.Type: GrantFiled: March 14, 1975Date of Patent: October 5, 1976Assignee: National Petro Chemicals CorporationInventors: Louis J. Rekers, Stanley J. Katzen, Jerome H. Krekeler
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Patent number: 3978002Abstract: An olefin polymerization catalyst comprising a silica xerogel support having a pore volume greater than about 2.0 cc/g, the major portion of which volume is provided by pores having pore diameters ranging from 300 to 600 A and a surface area ranging from 200 to 500 m.sup.2 /g, and having deposited thereon a metal-containing catalytic material, such as chromium oxide, or other metal oxide. Further, a polymerization process utilizing such a catalyst for the preparation of polyolefins having relatively low molecular weights and high melt indexes without loss of catalyst activity, especially a process for the preparation of polymers and copolymers of 1-olefins having a maximum of 8 carbon atoms in the chain and having no branching nearer the double bond than the 4-position, e.g., ethylene polymers.Type: GrantFiled: July 9, 1974Date of Patent: August 31, 1976Assignee: National Petro Chemicals CorporationInventors: Henri A. Aboutboul, William Kirch, Jerome H. Krekeler
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Patent number: 3960826Abstract: An olefin polymerization process for the preparation of polyolefins having relatively low molecular weights and high melt indexes without loss of catalyst activity, utilizing a catalyst comprising a silica xerogel support having a pore volume greater than about 2.0 cc/g, the major portion of which volume is provided by pores having pore diameters ranging from 300 to 600 A and a surface area ranging from 200 to 500 m.sup.2 /g, and having deposited thereon a metal-containing catalytic material, such as chromium oxide, or other metal oxide. The process is designed for the preparation of polymers and copolymers of 1-olefins having a maximum of 8 carbon atoms in the chain and having no branching nearer the double bond than the 4-position, e.g., ethylene polymers.Type: GrantFiled: August 12, 1974Date of Patent: June 1, 1976Assignee: National Petro Chemicals CorporationInventors: Henri A. Aboutboul, William Kirch, Jerome H. Krekeler