Patents by Inventor Kirby Lowery, Jr.
Kirby Lowery, Jr. 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: 4408025Abstract: Olefins are polymerized in the presence of a catalyst prepared by reacting a mixture of a tetrahydrocarbyloxy titanium compound such as tetraisopropyl titanate and a hydrocarbyloxy titanium oxide such as di(isopropoxy) titanium oxide, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an organoaluminum compound such as triethyl aluminum and a halide source such as ethyl aluminum dichloride. The catalysts employed in this process provide higher efficiencies than these catalysts employing either of the titanium compounds alone.Type: GrantFiled: November 12, 1981Date of Patent: October 4, 1983Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Kirby Lowery, Jr., Ronald L. Gibbs
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Patent number: 4399053Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins are prepared by reacting trivalent or tetravalent titanium compounds such as titanium tetraalkoxides, zirconium compounds such as tri-n-butoxy zirconium chloride, an organomagnesium component such as di-n-hexyl magnesium, a halogen source such as ethyl aluminum dichloride, a divalent zinc compound such as diethyl zinc and an organoaluminum compound if the halide source or magnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions and lower melt indices than do corresponding catalysts without both the divalent zinc and zirconium compounds.Type: GrantFiled: December 24, 1980Date of Patent: August 16, 1983Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach, Kirby Lowery, Jr.
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Patent number: 4379760Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins are prepared by reacting a mixture of a tetrahydrocarbyloxy titanium compound such as tetraisopropyl titanate and a hydrocarbyloxy titanium oxide such as di(isopropoxy) titanium oxide, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an organoaluminum compound such as triethyl aluminum and a halide source such as ethyl aluminum dichloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts provide higher efficiencies than those catalysts employing either of the titanium compounds alone.Type: GrantFiled: November 12, 1981Date of Patent: April 12, 1983Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Kirby Lowery, Jr., Ronald L. Gibbs
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Patent number: 4356111Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting trivalent or tetravalent titanium compounds such as titanium trichloride or titanium tetraalkoxide, zirconium compounds such as tri-n-butoxy zirconium chloride, an organomagnesium component such as di-n-hexyl magnesium, a halogen source such as ethyl aluminum dichloride and an organoaluminum compound if the halide source or magnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions and, at higher zirconium amounts, lower melt indices than do corresponding catalysts without the zirconium compound.Type: GrantFiled: October 20, 1980Date of Patent: October 26, 1982Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Kirby Lowery, Jr.
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Patent number: 4323665Abstract: .alpha.-Olfins, particularly higher olefins, are polymerized in the presence of a catalyst prepared by reacting (A) tetravalent tianium compounds such as titanium tetraalkoxide, (B) an organoaluminum compound, (C) an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an organoaluminum compound such as triethyl aluminum and, (D) as a halide source, a tetravalent tin compound such as tin tetrachloride. Polymers prepared by this process provide higher efficiencies than polymers prepared from a process utilizing catalysts employing HCl as the halide source.Type: GrantFiled: April 14, 1980Date of Patent: April 6, 1982Assignee: The Dow Chemical Co.Inventors: Kirby Lowery, Jr., Donald F. Birkelbach, Randall S. Shipley
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Patent number: 4321159Abstract: Dual transition metal compounds containing titanium and chromium are prepared by reacting a hydrocarbyloxy titanium halide with CrO.sub.3. The compounds are useful in catalysts for the polymerization of .alpha.-olefins.Type: GrantFiled: November 13, 1978Date of Patent: March 23, 1982Assignee: The Dow Chemical CompanyInventors: Wilbur L. Bressler, Kirby Lowery, Jr., Fred L. Vance, Jr.
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Patent number: 4319011Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins at temperatures above 140.degree. C. are provided by reacting a transition metal compound such as tetra(isopropoxy)titanium, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum, e.g., di-n-butylmagnesium.x triethylaluminum and a hydrogen halide or an active hydrocarbyl halide such as t-butyl chloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.Type: GrantFiled: September 16, 1980Date of Patent: March 9, 1982Assignee: The Dow Chemical Co.Inventors: Kirby Lowery, Jr., George W. Knight, James A. May, Jr.
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Patent number: 4314912Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins at temperatures above 140.degree. C. are provided by reacting a transition metal compound such as tetra(isopropoxy)titanium, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum, e.g., di-n-butylmagnesium.x triethylaluminum and a hydrogen halide or an active hydrocarbyl halide such as t-butyl chloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.Type: GrantFiled: September 16, 1980Date of Patent: February 9, 1982Assignee: The Dow Chemical CompanyInventors: Kirby Lowery, Jr., George W. Knight, James A. May, Jr.
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Patent number: 4310648Abstract: Olefins are polymerized in the presence of a catalyst prepared by reacting trivalent or tetravalent titanium compounds such as a titanium trichloride or a titanium tetraalkoxide, zirconium compounds such as tri-n-butoxy zirconium chloride, an organomagnesium component such as di-n-hexyl magnesium, a halogen source such as ethyl aluminum dichloride and an organoaluminum compound if the halide source or magnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing these catalyst compositions do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions and, at higher zirconium amounts, lower melt indices than do corresponding catalysts without the zirconium compound.Type: GrantFiled: October 20, 1980Date of Patent: January 12, 1982Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Kirby Lowery, Jr.
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Patent number: 4308369Abstract: Olefins are polymerized in the presence of a catalyst prepared by reacting tetravalent titanium compounds such as a titanium tetraalkoxide, an anhydrous zinc compound such as diethyl zinc, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and a halide source such as a hydrogen halide or an alkyl aluminum halide and an aluminum compound if the halide source or organomagnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions than do corresponding catalysts without the anhydrous zinc compound.Type: GrantFiled: June 2, 1980Date of Patent: December 29, 1981Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach, Kirby Lowery, Jr.
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Patent number: 4285834Abstract: A catalyst mixture containing at least two independently supported catalysts, at least one of which is an inorganic halide supported titanium and/or vanadium Ziegler type catalyst and at least one other is an inorganic oxide supported, chromium catalyst.These catalyst mixtures are suitable for polymerizing one or more .alpha.-olefins.Type: GrantFiled: December 31, 1979Date of Patent: August 25, 1981Assignee: The Dow Chemical CompanyInventors: Kirby Lowery, Jr., Fred L. Vance, Jr.
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Patent number: 4263422Abstract: Alpha-olefins are polymerized in the presence of at least two independently supported catalysts, one of which is an inorganic halide supported titanium and/or vanadium Ziegler type catalyst and at least one other is inorganic oxide supported, chromium catalyst. This dual catalyst increases catalyst efficiency and/or provides more flexible control of the properties of the resulting polymers.Type: GrantFiled: December 31, 1979Date of Patent: April 21, 1981Assignee: The Dow Chemical CompanyInventors: Kirby Lowery, Jr., Fred L. Vance, Jr.
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Patent number: 4250288Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins at temperatures above 140.degree. C. are provided by reacting a transition metal compound such as tetra(isopropoxy)titanium, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum, e.g., di-n-butylmagnesium.x triethylaluminum and a hydrogen halide or an active hydrocarbyl halide such as t-butyl chloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.Type: GrantFiled: February 3, 1977Date of Patent: February 10, 1981Assignee: The Dow Chemical CompanyInventors: Kirby Lowery, Jr., George W. Knight, James A. May, Jr.
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Patent number: 4238355Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting tetravalent or trivalent titanium compounds such as a titanium tetraalkoxide, an anhydrous zinc compound such as diethyl zinc, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum and a halide source such as a hydrogen halide or an alkyl aluminum halide and an aluminum compound if the halide source of organomagnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions than do corresponding catalysts without the anhydrous zinc compound.Type: GrantFiled: September 10, 1979Date of Patent: December 9, 1980Assignee: The Dow Chemical CompanyInventors: Randall S. Shipley, Donald F. Birkelbach, Kirby Lowery, Jr.
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Patent number: 4224186Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting (A) tetravalent titanium compounds such as titanium tetraalkoxide, (B) an organoaluminum compound, (C) an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an organo aluminum compound such as triethyl aluminum and, (D) as a halide source, a tetravalent tin compound such as tin tetrachloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts provide higher efficiencies than those catalysts employing HCl as the halide source.Type: GrantFiled: April 9, 1979Date of Patent: September 23, 1980Assignee: The Dow Chemical CompanyInventors: Kirby Lowery, Jr., Donald F. Birkelbach, Randall S. Shipley
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Patent number: 4204050Abstract: .alpha.-olefins are polymerized with a catalyst prepared from (1) an inert support, (2) the reaction product of a tetravalent hydrocarbyloxy titanium halide such as di-n-butoxy titanium dichloride and hexavalent chromium oxide and (3) an organometal activating agent such as a tri alkyl aluminum.Type: GrantFiled: November 9, 1978Date of Patent: May 20, 1980Assignee: The Dow Chemical CompanyInventors: Wilbur L. Bressler, Kirby Lowery, Jr., Fred L. Vance, Jr.
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Patent number: 4167615Abstract: Hydrocarbon-soluble compositions useful as the transition metal component in the Ziegler polymerization of .alpha.-olefins are provided by reacting molecular nitrogen or hydrogen with a transition metal compound such as titanium trichloride to form a dinitrogen or dihydrogen complex of the transition metal compound.Type: GrantFiled: January 16, 1978Date of Patent: September 11, 1979Assignee: The Dow Chemical CompanyInventors: Donald E. Gessell, Kirby Lowery, Jr.
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Patent number: 4091082Abstract: Hydrocarbon-soluble compositions useful as the transition metal component in the Ziegler polymerization of .alpha.-olefins are provided by reacting molecular nitrogen or hydrogen with a transition metal compound such as titanium trichloride to form a dinitrogen or dihydrogen complex of the transition metal compound.Type: GrantFiled: June 4, 1976Date of Patent: May 23, 1978Assignee: The Dow Chemical CompanyInventors: Donald Earl Gessell, Kirby Lowery, Jr.