Patents by Inventor Louis J. Rekers
Louis J. Rekers 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: 4267090Abstract: Vinyl acetate-ethylene copolymer latices having an inherent viscosity of not less than about 1.90 and demonstrating superior performance in the Time of Set Test and Vinyl Wetting Test are prepared by the process which comprises copolymerizing from about 60% to about 95% by weight of vinyl acetate monomer with from about 40% to about 5% by weight of ethylene monomer in an emulsified reaction medium containing:(a) at least one surface active agent in an amount of not less than about 1.0% by weight, and not more than about 2.0% by weight, of the total monomer,(b) a catalyst, and(c) a protective colloid,the total weight of the surface active agent and vinyl acetate monomer being introduced into the reaction medium in delayed increments prior to and after the commencement of copolymerization.Type: GrantFiled: January 22, 1979Date of Patent: May 12, 1981Assignee: National Distillers and Chemical Corp.Inventors: Manfred Heimberg, Louis J. Rekers
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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: 4252926Abstract: Olefins are polymerized in the presence of catalysts prepared by combining a heat activated supported organophosphoryl chromium compound with an alkyl borane which has been pretreated with hydrogen.Type: GrantFiled: August 7, 1978Date of Patent: February 24, 1981Assignee: National Petro Chemicals Corp.Inventors: Stanley J. Katzen, Louis J. Rekers
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Catalyst composition, method for producing same and method for polymerization of 1-olefins with same
Patent number: 4234709Abstract: Supported catalyst compositions incorporating preformed materials comprising the reaction product of organophosphorus compounds such as the organophosphates and organophosphites with chromium trioxide, wherein the organic moiety is a hydrocarbon radical, e.g., alkyl, aralkyl, aryl, cycloalkyl, or the like or combinations thereof. Typical supports constitute an inorganic material of high surface area, especially a high pore volume (>1.96 cc/g) silica xerogel. Catalytically promoted polymerizations of 1-olefins proceed efficiently to products of specially adapted utility for molding, and particularly the production of blow molded articles. The polymerization activity of the catalyst compositions is promoted by heating in a dry, oxygen containing atmosphere. The catalysts are utilized alone or in conjunction with other catalytic ingredients such as organometallic and/or organo non-metallic reducing agents.Type: GrantFiled: May 7, 1976Date of Patent: November 18, 1980Assignee: National Petro Chemicals CorporationInventors: Louis J. Rekers, Stanley J. Katzen -
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: 4189402Abstract: Polymerization of 1-olefins is conducted with a supported catalyst consisting essentially of a polymeric hydrocarbon aluminate comprising at least one ##STR1## unit.Type: GrantFiled: November 17, 1978Date of Patent: February 19, 1980Assignee: National Petro Chemicals CorporationInventors: Louis J. Rekers, Anthony N. Speca
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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: 4150209Abstract: Catalysts, especially for olefin polymerization are prepared by coating an aluminum compound on a selected high pore volume silica gel, and calcining the support at temperatures of from about 200.degree. to 2000.degree. F. The preferred catalyst is prepared with an inorganic support material as aforesaid, thereafter depositing an organophosphoryl chromium compound thereon, and activating the thus-treated support by heating in a non-reducing, preferably oxygen-containing, atmosphere at temperatures of from about 800.degree. to 2000.degree. F. The activated, supported catalyst composition may, but need not necessarily, be 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 6, 1978Date of Patent: April 17, 1979Assignee: National Petro Chemicals CorporationInventors: Stanley J. Katzen, Louis J. Rekers
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Patent number: 4118340Abstract: Supported catalyst compositions incorporating preformed materials comprising the reaction product of (1) organoborate compounds such as trialkyl borate, and (2) chromium trioxide. Typical supports constitute an inorganic material of moderate to high surface area, especially a high pore volume (greater than about 1.96 cc/g) silica xerogel. The supported catalysts are utilized alone or in conjunction with other catalytic ingredients such as organometallic and/or organo non-metallic reducing agents for the polymerization of 1-olefins.Type: GrantFiled: June 7, 1976Date of Patent: October 3, 1978Assignee: National Distillers and Chemical CorporationInventor: Louis J. Rekers
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Patent number: 4100104Abstract: Catalysts, especially for olefin polymerization are prepared by coating an aluminum compound on a selected high pore volume silica gel, and calcining the support at temperatures of from about 200.degree. to 2000.degree. F. The preferred catalyst is prepared with an inorganic support material as aforesaid, thereafter depositing an organophosphoryl chromium compound thereon, and activating the thus-treated support by heating in a non-reducing, preferably oxygen-containing, atmosphere at temperatures of from about 800.degree. to 2000.degree. F. The activated, supported catalyst composition may, but need not necessarily, be combined with a metallic and/or non-metallic reducing agent, to provide a catalyst system useful in the polymerization of 1-olefins.BACKGROUND OF THE INVENTIONThe modification of silica gels for catalytic activity is known as discussed in Burwell, Chemtech, pp. 370-377 (1974).The use of chromium compounds in the polymerization of olefins is well-known. U.S. Pat. Nos.Type: GrantFiled: January 13, 1977Date of Patent: July 11, 1978Assignee: National Petro Chemicals CorporationInventors: Stanley J. Katzen, Louis J. Rekers
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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: 3985676Abstract: Supported catalyst compositions made by incorporating preformed materials comprising the reaction product of organophosphorus compounds such as the organophosphates and organophosphites with chromium trioxide, wherein the organic moiety is a hydrocarbon radical, e.g., alkyl, aralkyl, aryl, cycloalkyl, or the like or combinations thereof. Typical supports constitute an inorganic material of high surface area, especially a high pore volume (>1.96 cc/g) silica xerogel. The catalysts are activated by heating in a dry, oxygen containing atmosphere. The catalysts are utilized alone or in conjunction with other catalytic ingredients such as organometallic and/or organo non-metallic reducing agents. Polymerizations of 1-olefins promoted with the subject catalysts proceed efficiently to products of specially adapted utility for molding, particularly to resins useful for the production of blow molded articles.Type: GrantFiled: December 16, 1974Date of Patent: October 12, 1976Assignee: National Petro Chemicals CorporationInventors: Louis J. Rekers, Stanley J. Katzen
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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