Patents by Inventor Dennis E. Dria
Dennis E. Dria 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: 4647673Abstract: A process is provided for the preparation of attrition resistant, microspheroidal fluid bed catalysts comprising the mixed oxides of vanadium and phosphorus in which a vanadium phosphorus mixed oxided catalyst precursor is densified, comminuted, formed into fluidizable particles and calcined under fluidization-type conditions. The present invention further provides the attrition resistant fluidizable catalysts prepared by the inventive process, and further provides a process for utilizing such attrition resistant catalysts in the production of maleic anhydride in the vapor phase by the oxidation of 4 carbon atom hydrocarbons.Type: GrantFiled: May 13, 1985Date of Patent: March 3, 1987Assignee: The Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria, Ernest C. Milberger, Patricia R. Blum, Mark L. Nicholas
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Patent number: 4563439Abstract: Vanadium phosphorus mixed oxide containing catalysts are prepared by sequentially forming an alpha-VOPO.sub.4 catalyst precursor in aqueous media, and thereafter partially reducing a portion of the vanadium to a valence state of +4 in an organic liquid reducing media, in the absence of corrosive reducing agents. The catalysts exhibit excellent activity for the production of maleic anhydride from 4 carbon atom hydrocarbons such as n-butane.Type: GrantFiled: August 14, 1984Date of Patent: January 7, 1986Assignee: The Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria
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Patent number: 4525471Abstract: A process is provided for the preparation of attrition resistant, microspheroidal fluid bed catalysts comprising the mixed oxides of vanadium and phosphorus in which a vanadium phosphorus mixed oxided catalyst precursor is densified, comminuted, formed into fluidizable particles and calcined under fluidization-type conditions. The present invention further provides the attrition resistant fluidizable catalysts prepared by the inventive process, and further provides a process for utilizing such attrition resistant catalysts in the production of maleic anhydride in the vapor phase by the oxidation of 4 carbon atom hydrocarbons.Type: GrantFiled: April 2, 1984Date of Patent: June 25, 1985Assignee: The Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria, Ernest C. Milberger, Patricia R. Blum, Mark L. Nicholas
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Patent number: 4507212Abstract: Unsaturated nitrile compounds, e.g., acrylonitrile, are used as microbiocides to inhibit undesired bacterial growth in injection water used in enhanced oil recovery methods. The biocides are efficacious for the control of sulfate reducing bacteria, including Desulfovibrio desulfuricans.Type: GrantFiled: November 15, 1982Date of Patent: March 26, 1985Assignee: The Standard Oil CompanyInventors: Dennis E. Dria, Noel J. Bremer, Myra A. Dria, Rodger W. McKain
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Patent number: 4465846Abstract: Vanadium phosphorus mixed oxide containing catalysts are prepared by sequentially forming an alpha-VOPO.sub.4 catalyst precursor in aqueous media, and thereafter partially reducing a portion of the vanadium to a valence state of +4 in an organic liquid reducing media, in the absence of corrosive reducing agents. The catalysts exhibit excellent activity for the production of maleic anhydride from 4 carbon atom hydrocarbons such as n-butane.Type: GrantFiled: April 27, 1983Date of Patent: August 14, 1984Assignee: The Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria
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Patent number: 4455434Abstract: A process is provided for preparing supported catalysts by impregnating a pre-formed support with a solution of a metal alkoxide and contacting the impregnated support with a solution of at least one additional catalyst component. This process is particularly suitable for forming attrition resistant fluidizable catalysts. Catalysts prepared by this method are useful in various reaction processes, and may be utilized in oxidation processes such as the production of maleic anhydride from 4 carbon atom hydrocarbons.Type: GrantFiled: February 28, 1983Date of Patent: June 19, 1984Assignee: The Standard Oil CompanyInventors: Dennis E. Dria, Noel J. Bremer
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Patent number: 4448893Abstract: Vanadium phosphorus mixed oxide containing catalysts are prepared in an organic liquid reaction medium with heating wherein at least 1.5 moles organic liquid are removed from the reaction medium such as by distillation for each mole of vanadium which is reduced or reacted during such reaction and/or reduction. The resulting catalysts are useful for the production of maleic anhydride from 4 carbon atom hydrocarbons.Type: GrantFiled: August 26, 1982Date of Patent: May 15, 1984Assignee: The Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria, Andrew M. Weber
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Patent number: 4429137Abstract: The present invention provides a process for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce high yields of maleic anhydride with good selectivity. A vanadium compound is introduced into a liquid medium, a mixed phosphorus component comprising orthophosphoric acid and pyrophosphoric acid is added to the liquid medium, reduction of at least a portion of the vanadium to a +4 valence state is effected either prior to or subsequent to the addition of the mixed phosphorus component, and the resulting vanadium-phosphorus oxide catalyst precursor is recovered, dried and calcined.Type: GrantFiled: June 16, 1982Date of Patent: January 31, 1984Assignee: The Standard Oil CompanyInventors: Patricia R. Blum, Ernest C. Milberger, Noel J. Bremer, Dennis E. Dria
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Patent number: 4426342Abstract: Halogenated hydrocarbons, such as perchloroethylene, are applied to fine powders, such as metal oxides, in the absence of binders to improve the flow and tableting properties of the powders.Type: GrantFiled: December 18, 1981Date of Patent: January 17, 1984Assignee: The Standard Oil CompanyInventors: Dennis E. Dria, Noel J. Bremer
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Patent number: 4400306Abstract: A process is provided for preparing supported catalysts by impregnating a pre-formed support with a solution of a metal alkoxide and contacting the impregnated support with a solution of at least one additional catalyst component. This process is particularly suitable for forming attrition resistant fluidizable catalysts. Catalysts prepared by this method are useful in various reaction processes, and may be utilized in oxidation processes such as the production of maleic anhydride from 4 carbon atom hydrocarbons.Type: GrantFiled: June 28, 1982Date of Patent: August 23, 1983Assignee: The Standard Oil CompanyInventors: Dennis E. Dria, Noel J. Bremer
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Patent number: 4396536Abstract: The present invention provides a process for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce high yields of maleic anhydride with good selectivity. A vanadium compound is introduced into an olefinic oxygenated organic liquid medium, a phosphorus-containing compound is added to the medium, reduction of at least a portion of the vanadium to a +4 valence state is effected either prior to or subsequent to the addition of the phosphorus-containing compound, and the resulting vanadium-phosphorus oxide catalyst precursor is recovered, dried and calcined.Type: GrantFiled: September 14, 1981Date of Patent: August 2, 1983Assignee: The Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria
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Patent number: 4396535Abstract: Vanadium phosphorus mixed oxide containing catalysts are prepared by sequentially forming an alpha-VOPO.sub.4 catalyst precursor in aqueous media, and thereafter partially reducing a portion of the vanadium to a valence state of +4 in an organic liquid reducing media, in the absence of corrosive reducing agents. The catalysts exhibit excellent activity for the production of maleic anhydride from 4 carbon atom hydrocarbons such as n-butane.Type: GrantFiled: November 12, 1981Date of Patent: August 2, 1983Assignee: The Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria
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Patent number: 4365069Abstract: Vanadium phosphorus mixed oxide containing catalysts are prepared in an organic liquid reaction medium with heating wherein at least 1.5 moles organic liquid are removed from the reaction medium such as by distillation for each mole of vanadium which is reduced or reacted during such reaction and/or reduction. The resulting catalysts are useful for the production of maleic anhydride from 4 carbon atom hydrocarbons.Type: GrantFiled: July 24, 1981Date of Patent: December 21, 1982Assignee: The Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria, Andrew M. Weber
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Patent number: 4361501Abstract: The present invention provides a process for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce high yields of maleic anhydride with good selectivity. A vanadium compound is introduced into a liquid medium, a mixed phosphorus component comprising orthophosphoric acid and pyrophosphoric acid is added to the liquid medium, reduction of at least a portion of the vanadium to a +4 valence state is effected either prior to or subsequent to the addition of the mixed phosphorus component, and the resulting vanadium-phosphorus oxide catalyst precursor is recovered, dried and calcined.Type: GrantFiled: December 29, 1980Date of Patent: November 30, 1982Assignee: The Standard Oil CompanyInventors: Patricia R. Blum, Ernest C. Milberger, Noel J. Bremer, Dennis E. Dria
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Patent number: 4350639Abstract: The present invention provides improved oxidation catalysts containing mixed oxides of vanadium and phosphorus and the method for the preparation thereof, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce excellent yields of maleic anhydride with very good selectivity. At least one vanadium compound, a substantial portion of which is in the pentavalent state, and at least one phosphorus-containing compound is added to an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, to form a reaction mixture. Partial reduction of the vanadium is effected in the presence of the phosphorus-containing compound and a highly ordered and uniform mixed vanadium phosphorus oxide-containing catalyst precursor is formed.Type: GrantFiled: April 29, 1981Date of Patent: September 21, 1982Assignee: The Standard Oil CompanyInventors: Ernest C. Milberger, Noel J. Bremer, Dennis E. Dria
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Patent number: 4333853Abstract: The present invention provides improved oxidation catalysts containing mixed oxides of vanadium and phosphorus and the method for the preparation thereof, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce excellent yields of maleic anhydride with very good selectivity. At least one vanadium compound, a substantial portion of which is in the pentavalent state, and at least one phosphorus-containing compound is added to an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, to form a reaction mixture. Partial reduction of the vanadium is effected in the presence of the phosphorus-containing compound and a highly ordered and uniform mixed vanadium phosphorus oxide-containing catalyst precursor is formed.Type: GrantFiled: May 5, 1980Date of Patent: June 8, 1982Assignee: The Standard Oil CompanyInventors: Ernest C. Milberger, Noel J. Bremer, Dennis E. Dria
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Patent number: 4315864Abstract: The present invention provides a process for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce high yields of maleic anhydride with good selectivity. A vanadium compound is introduced into an olefinic oxygenated organic liquid medium, a phosphorus-containing compound is added to the medium, reduction of at least a portion of the vanadium to a +4 valence state is effected either prior to or subsequent to the addition of the phosphorus-containing compound, and the resulting vanadium-phosphorus oxide catalyst precursor is recovered, dried and calcined.Type: GrantFiled: October 22, 1980Date of Patent: February 16, 1982Assignee: Standard Oil Company (Ohio)Inventors: Noel J. Bremer, Dennis E. Dria
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Patent number: 4294722Abstract: The present invention provides a method for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce improved yields of maleic anhydride with good selectivity. A vanadium compound is at least partially solubilized in an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, and unsolubilized vanadium having a particle size larger than about 0.1 mm diameter is removed from the medium before addition of a phosphorus-containing compound.Type: GrantFiled: May 19, 1980Date of Patent: October 13, 1981Assignee: Standard Oil CompanyInventors: Noel J. Bremer, Dennis E. Dria
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Patent number: 4244879Abstract: The present invention provides a method for the preparation of oxidation catalysts containing mixed oxides of vanadium and phosphorus, which catalysts are particularly effective in the oxidation of n-butane, n-butenes, 1,3-butadiene or a mixture thereof with molecular oxygen or an oxygen-containing gas in the vapor phase to produce improved yields of maleic anhydride with good selectivity. A vanadium compound is at least partially solubilized in an organic liquid medium capable of reducing at least a portion of the vanadium to a +4 valence state, and unsolubilized vanadium having a particle size larger than about 0.1 mm diameter is removed from the medium before addition of a phosphorus-containing compound.Type: GrantFiled: December 26, 1979Date of Patent: January 13, 1981Assignee: Standard Oil Company (Ohio)Inventors: Noel J. Bremer, Dennis E. Dria