Patents by Inventor Nicholas M. Karayannis
Nicholas M. Karayannis 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: 6051524Abstract: A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins containing magnesium, titanium, and halogen further contains an internal electron donor comprising ##STR1## wherein R is selected from C.sub.1 -C.sub.8 alkyl, C.sub.6 -C.sub.9 aryl or C.sub.1 -C.sub.8 alkoxy groups; and wherein X and Y are N-R', O, P(O)(OR'), P(O)R', or S, and R' is selected from hydrogen, C.sub.1 -C.sub.8 alkyl and alkoxy, and C.sub.6 -C.sub.9 aryl groups, provided that up to two Y groups may be CR'.sub.2 groups.Type: GrantFiled: April 22, 1993Date of Patent: April 18, 2000Assignee: BP Amoco CorporationInventors: Nicholas M. Karayannis, Steven A. Cohen, Julie L. Ledermann
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Patent number: 5332707Abstract: A magnesium-containing supported titanium-containing and a hafnium-containing and/or zirconium-containing catalyst or catalyst component for the polymerization or copolymerization of alpha-olefins.Type: GrantFiled: July 31, 1992Date of Patent: July 26, 1994Assignee: Amoco CorporationInventors: Nicholas M. Karayannis, Steven A. Cohen, Julie L. Ledermann
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Patent number: 5227354Abstract: A process for making a magnesium-containing supported titanium-containing and vanadium-containing catalyst or catalyst component for the polymerization or copolymerization of alpha-olefins.Type: GrantFiled: April 3, 1992Date of Patent: July 13, 1993Assignee: Amoco CorporationInventors: Nicholas M. Karayannis, Steven A. Cohen, Julie L. Ledermann
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Patent number: 5223466Abstract: A process for making a magnesium-containing supported titanium-containing, alpha-olefin polymerization or co-polymerization catalyst or catalyst component having a large particle size, semi-spherical particle shape and high resistance to attrition.Type: GrantFiled: March 20, 1992Date of Patent: June 29, 1993Assignee: Amoco CorporationInventors: Sam S. Lee, Nicholas M. Karayannis
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Patent number: 5218052Abstract: A multistage method for making a homopolymer or copolymer of an alpha-olefin having increased stiffness and broadened molecular weight distribution.Type: GrantFiled: November 18, 1991Date of Patent: June 8, 1993Assignee: Amoco CorporationInventors: Steven A. Cohen, Nicholas M. Karayannis, Jerome A. Streeky, Benjamin S. Tovrog
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Patent number: 5013702Abstract: A solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprises the product formed by (A) forming a solution of a magnesium-containing species from a magnesium carbonate or a magnesium carboxylate; (B) precipitating solid particles from such magnesium-containing solution by treatment with a transition metal halide and an organosilane; (C) reprecipitating such solid particles from a mixture containing a cyclic ether; and (D) treating the reprecipitated particles with a transition metal compound and an electron donor.Type: GrantFiled: November 9, 1989Date of Patent: May 7, 1991Assignee: Amoco CorporationInventors: Gregory G. Arzoumanidis, Nicholas M. Karayannis, Habet M. Khelghatian, Sam S. Lee, Bryce V. Johnson
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Patent number: 4988656Abstract: A solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprises the product formed by (A) forming a solution of a magnesium-containing species from a magnesium carbonte or a magnesium carboxylate; (B) precipitating solid particles from such magnesium-containing solution by treatment with a transition metal halide and an organosilane; (C) reprecipitating such solid particles from a mixture containing a cyclic ether; and (D) treating the reprecipitated particles with a transition metal compound and an electron donor.Type: GrantFiled: May 12, 1989Date of Patent: January 29, 1991Assignee: Amoco CorporationInventors: Gregory G. Arzoumanidis, Nicholas M. Karayannis, Habet M. Khelghatian, Sam S. Lee, Bryce V. Johnson
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Patent number: 4946816Abstract: In a solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprising the product formed by (A) forming a solution of a magnesium-containing species from a magnesium alkyl (or hydrocarbyl) carbonate or a magnesium carboxylate; (B) precipitating solid particles from such magnesium-containing toluene-based solvent by treatment with a transition metal halide and an organosilane; (C) reprecipitating such solid particles from a mixture containing a cyclic either; and (D) treating the reprecipitated particles with a transition metal compound and an electron donor, the morphology of such component is modified by incorporating a morphology-affecting amount of C.sub.8 -C.sub.10 aromatics within the toluene-based solvent in Step B, Step A, in Step C prior to addition of ether, or combinations thereof.Type: GrantFiled: August 21, 1989Date of Patent: August 7, 1990Assignee: Amoco CorporationInventors: Steven A. Cohen, Gregory G. Arzoumanidis, Nicholas M. Karayannis, Habet M. Khelghatian, Sam S. Lee
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Patent number: 4866022Abstract: A solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprises the product formed by (A) forming a solution of a magnesium-containing species from a magnesium carbonate or a magnesium carboxylate; (B) precipitating solid particles from such magnesium-containing solution by treatment with a transition metal halide and an organosilane; (C) reprecipitating such solid particles from a mixture containing a cyclic ether; and (D) treating the reprecipitated particles with a transition metal compound and an electron donor.Type: GrantFiled: April 25, 1988Date of Patent: September 12, 1989Assignee: Amoco CorporationInventors: Gregory G. Arzoumanidis, Nicholas M. Karayannis, Habet M. Khelghatian, Sam S. Lee, Bryce V. Johnson
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Patent number: 4657882Abstract: A solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics, comprises the product formed by (a) complexing a magnesium alkyl composition with an organophosphoryl compound; (b) reacting the resulting stable complex with a compatible precipitation agent to form a solid component; and (c) reacting the resulting solid with a titanium (IV) compound and an electron donor compound in a suitable diluent.Type: GrantFiled: December 26, 1985Date of Patent: April 14, 1987Assignee: Amoco CorporationInventors: Nicholas M. Karayannis, John S. Skryantz, Bryce V. Johnson
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Patent number: 4581342Abstract: A solid-hydrocarbon insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics, comprises the product formed by (a) complexing a magnesium alkyl composition with an ortho disubstituted hindered aromatic acid ester; (b) reacting the resulting complex with a compatible precipitation agent to form a solid component; and (c) reacting the resulting solid with a titanium(IV) compound and an electron donor compound in a suitable diluent.Type: GrantFiled: November 26, 1984Date of Patent: April 8, 1986Assignee: Standard Oil Company (Indiana)Inventors: Bryce V. Johnson, Nicholas M. Karayannis, Charles R. Hoppin, Linda Ornellas
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Patent number: 4526882Abstract: A comminuted, supported polymerization catalyst for alpha-olefins comprises (A) an organoaluminum compound and (B) a solid titanium-containing component formed by at least one halogen-containing compound of titanium(IV); (b) at least one electron donor; and (c) at least one hydrocarbon-insoluble magnesium-containing compound; and (2) retreating such comminuted product with (a) at least one halogen-containing compound of titanium(IV); and (b) a mixture containing ethylbenzoate and a substituted alkyl aromatic acid ester in which the substituent group has a negative Hammett constant; and optionally, at least one chlorocarbon and/or at least one haloalkylchlorosilane.Type: GrantFiled: October 24, 1983Date of Patent: July 2, 1985Assignee: Standard Oil Company (Indiana)Inventors: Bryce V. Johnson, Nicholas M. Karayannis, John S. Skryantz
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Patent number: 4431572Abstract: A comminuted, supported polymerization catalyst for alpha-olefins comprises (A) an organoaluminum compound and (B) a solid titanium-containing component formed by (1) comminuting a solid reaction product comprising (a) at least one halogen-containing compound of titanium (IV); (b) at least one electron donor; and (c) at least one hydrocarbon-insoluble magnesium-containing compound; and (2) retreating such comminuted product with (a) at least one halogen-containing compound of titanium (IV); (b) at least one chlorocarbon; and (c) at least one organic acid ester.Type: GrantFiled: May 14, 1982Date of Patent: February 14, 1984Assignee: Standard Oil Company (Indiana)Inventors: Nicholas M. Karayannis, Bryce V. Johnson
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Patent number: 4431571Abstract: A comminuted, supported polymerization catalyst for alpha-olefins comprises (A) an organoaluminum compound and (B) a solid titanium-containing component formed by (1) comminuting a solid reaction product comprising (a) at least one halogen-containing compound of titanium(IV); (b) at least one electron donor; and (c) at least one hydrocarbon-insoluble magnesium-containing compound; and (2) retreating such comminuted product with (a) at least one halogen-containing compound of titanium(IV); (b) at least one haloalkylchlorosilane; and (c) at least one organic acid ester.Type: GrantFiled: May 14, 1982Date of Patent: February 14, 1984Assignee: Standard Oil Company (Indiana)Inventor: Nicholas M. Karayannis
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Patent number: 4353813Abstract: Alpha-olefin polymerization catalyst comprising organometallic promoter and component obtained by contacting at least one halogenated aliphatic with solid reaction product of components comprising (1) titanium(IV) halide; (2) organic electron donor; and (3) pretreatment product prepared from components comprising (a) magnesium alcoholate, (b) Group II or IIIA metal alkyl, and optionally, (c) pretreatment modifier.Type: GrantFiled: September 29, 1980Date of Patent: October 12, 1982Assignee: Standard Oil Company (Indiana)Inventors: Nicholas M. Karayannis, John S. Skryantz
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Patent number: 4324690Abstract: Catalyst for the stereospecific polymerization of alpha-olefins of 3 or more carbon atoms comprising an organoaluminum component and a component prepared from halogen-containing compound of titanium(IV), organic electron donor, and a pretreatment product of components comprising magnesium alcoholate, organosilicon compound, and optionally, one or more Group II or IIIA metal alkyls, pretreatment modifiers such as a mineral acid or anhydride of sulfur, organometallic chalcogenide derivative of hydrogen sulfide, organic acid or organic acid ester, or combination of metal alkyl and modifier. Preferably, the product obtained from such materials is mechanically activated prior to polymerization use.Type: GrantFiled: January 21, 1980Date of Patent: April 13, 1982Assignee: Standard Oil Company (Indiana)Inventors: Nicholas M. Karayannis, John S. Skryantz
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Patent number: 4317898Abstract: A novel catalyst and process for producing highly-crystalline polypropylene or pure block or terminal block types of copolymers of propylene and ethylene or propylene and another alpha-olefin in excellent yields which coproduce minor amounts of low-molecular-weight and, particularly, amorphous polymers. The catalyst comprises an aluminum alkyl compound, titanium trichloride, a sterically-hindered cyclic amine and an organotin sulfide. This novel catalyst and process are useful in polymerization techniques which use a polymerization medium or those in which the condensed monomer is polymerized from the liquid phase or those in which polymerization is accomplished from monomer substantially in the vapor phase.Type: GrantFiled: January 8, 1981Date of Patent: March 2, 1982Assignee: Standard Oil Company (Indiana)Inventors: Nicholas M. Karayannis, Sam S. Lee
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Patent number: 4277370Abstract: Catalyst for the stereospecific polymerization of alpha-olefins of 3 or more carbon atoms comprising an organoaluminum compound and a component prepared from halogen-containing compound of titanium(IV), organic electron donor, and a pretreatment product of components comprising magnesium alcoholate, Group II or IIIA metal alkyl, and optionally, one or more pretreatment modifiers such as a mineral acid or anhydride of sulfur, organometallic chalcogenide derivative of hydrogen sulfide, organic acid or organic acid ester. Preferably, the product obtained from such materials is contacted with liquid Lewis acid and mechanically activated prior to polymerization use.Type: GrantFiled: January 21, 1980Date of Patent: July 7, 1981Assignee: Standard Oil Company (Indiana)Inventors: Nicholas M. Karayannis, John S. Skryantz
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Patent number: 4276191Abstract: Catalyst and process for polymerization of alpha-olefins to predominantly atactic products, such catalyst comprising (A) an organoaluminum component and (B) a solid reaction product of (1) a titanium (IV) component and (2) a hydrocarbon-soluble organomagnesium-organoaluminum complex.Type: GrantFiled: June 4, 1979Date of Patent: June 30, 1981Assignee: Standard Oil Company (Indiana)Inventors: Nicholas M. Karayannis, Harold Grams, John S. Skryantz
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Patent number: 4258168Abstract: In an alpha-olefin polymerization process using a transition metal halide-aluminum alkyl catalyst system, addition of minor, effective amounts of alkyl orthoformates, thiophosphates and borates decreases the amount of low molecular weight or amorphous polymer produced.Type: GrantFiled: June 16, 1976Date of Patent: March 24, 1981Assignee: Standard Oil Company (Indiana)Inventors: Nicholas M. Karayannis, Sam S. Lee