Patents by Inventor James L. Callahan
James L. Callahan 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: 4877898Abstract: A process for the one step esterification of aldehydes and alcohols comprises the steps of combining an aldehyde with an alcohol, in the presence of oxygen and in contact with a catalyst having the general formulaPdTe.sub.a Zn.sub.d E.sub.ewhereE is one or more metals from the group consisting of group IA, IIA, IVA, VIIB or VIII metals, As or Sb; anda, d and e are from about 0 to 3 with the proviso that at least d or e.noteq.0.Type: GrantFiled: June 12, 1986Date of Patent: October 31, 1989Assignee: The Standard Oil CompanyInventors: Christos Paparizos, Wilfrid G. Shaw, James L. Callahan
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Patent number: 4864057Abstract: A process is provided for the oxydehydrogenation of saturated carboxylic acids or a lower alkyl ester thereof with oxygen in the presence of iron phosphorus oxide catalysts containing promoters selected from the group Ag, Al, B, Be, Cd, Co, Cu, Ga, Ge, In, Mn, Ni, Te, Th, Ti, Tl, U, V, Zn, Zr, rare earths and mixtures thereof.Type: GrantFiled: August 17, 1982Date of Patent: September 5, 1989Inventors: S. Erik Pedersen, James L. Callahan, Harley F. Hardman
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Patent number: 4742035Abstract: A process is provided for the oxydehydrogenation of saturated carboxylic acids with oxygen in the presence of iron phosphorus oxide catalysts containing promoters selected from the group Ag, Al, B, Cd, Co, Cr, Cu, Ga, Ge, In, Mn, Ni, Te, Th, Ti, Tl, U, V, Zn, Zr, rare earths and mixtures thereof.Type: GrantFiled: January 28, 1987Date of Patent: May 3, 1988Assignee: The Standard Oil Co.Inventors: S. Erik Pederson, James L. Callahan, Harley F. Hardman
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Patent number: 4714695Abstract: A method for the preparation of a high activity palladium metal based catalyst having the formulaPdTe.sub.a Zn.sub.d E.sub.ewhereE is one or more metals from the group IIA, IVA, VA, IB, VIIB or VIII; anda, d and e are from about 0 to 3, with the proviso that at least d or e.noteq.0.The method comprises the step of forming an aqueous solution of a palladium compound, adding to the solution a powder of a reducing metal more electropositive than palladium and reducing the palladium to its metallic state on the surface of the reducing metal and, separating the resulting catalyst from the solution. Catalysts prepared according to this method are useful for producing esters from aldehydes and alcohols and provide greater conversions to the ester than catalysts prepared by previous processes.Type: GrantFiled: April 16, 1986Date of Patent: December 22, 1987Assignee: The Standard Oil CompanyInventors: Christos Paparizos, Wilfrid G. Shaw, James L. Callahan
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Patent number: 4705675Abstract: A method for preparing a molecular sieving metallosilicate is disclosed which comprises(A) providing an aqueous dispersion of colloidal particles comprising contiguous mixtures of silica and the oxide of a transition metal selected from the group consisting of Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Zr, Y or a mixture of two or more of said metals;(B) mixing an effective amount of a mineralizing agent and/or synthesis directing agent with said dispersion to form a gel; and(C) maintaining said gel at a temperature of about 80.degree. C. to about 300.degree. C. for an effective period of time to provide said metallosilicate.Type: GrantFiled: November 16, 1984Date of Patent: November 10, 1987Assignee: The Standard Oil CompanyInventors: Michael J. Desmond, Marc A. Pepera, James L. Callahan
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Patent number: 4634502Abstract: A process for the reductive deposition of polyoxometallate complexes on supports. The process includes the steps of forming a solution of at least one polyoxometallate compound in a solvent, said compound having the formula A.sub.a (L.sub.l M.sub.m J.sub.z O.sub.y), adding a quantity of a support material having electronic conductivity to the solution, charging the solution containing the support material to an electrolytic cell in contact with the cathode thereof, the cell having a separate compartment for the anode, passing a current of from about 0.1 to about 500 mA/cm.sup.2 of electrode area through the cell whereby the support material receives a deposit of a polyoxometallate wherein the average oxidation state of the metals therein has been reduced to a valence greater than zero and, thereafter separating and recovering the support material carrying the reduced metallate complex.Type: GrantFiled: August 26, 1985Date of Patent: January 6, 1987Assignee: The Standard Oil CompanyInventors: James L. Callahan, Michael J. Desmond, Marc A. Pepera
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Patent number: 4623635Abstract: A method for the preparation of a high activity palladium metal based catalyst having the formulaPdTe.sub.a Zn.sub.d E.sub.ewhereE is one or more metals from the group IIA, IVA, VA, IB, VIIB or VIII; anda, d and e are from about 0 to 3, with the proviso that at least d or e.noteq.0.The method comprises the step of forming an aqueous solution of a palladium compound, adding to the solution a powder of a reducing metal more electropositive than palladium and reducing the palladium to its metallic state on the surface of the reducing metal and, separating the resulting catalyst from the solution. Catalysts prepared according to this method are useful for producing esters from aldehydes and alcohols and provide greater conversions to the ester than catalysts prepared by previous processes.Type: GrantFiled: April 18, 1985Date of Patent: November 18, 1986Assignee: The Standard Oil CompanyInventors: Christos Paparizos, Wilfrid G. Shaw, James L. Callahan
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Patent number: 4622424Abstract: A process for conducting a combination of fixed and fluid-bed catalytic reactions is achieved by employing fixed-bed catalysts on supports within the fluid bed. The fluid-bed catalysts may move in both directions through the fixed bed, thereby giving advantages of both types of beds in one reactor.Type: GrantFiled: September 6, 1985Date of Patent: November 11, 1986Assignee: The Standard Oil CompanyInventors: James L. Callahan, Arthur F. Miller, Wilfrid G. Shaw
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Patent number: 4528398Abstract: The present invention relates to a method for the preparation of phosphomolybdic acid based catalysts utilized in the oxidation of aldehydes to unsaturated carboxylic acids by forming a solution of hydrated phosphomolybdic acid in a substantially anhydrous alkanol, adding a base to the solution, evaporating the solution to yield a catalyst powder and thereafter drying and calcining the powder to form the active catalyst. A second method for preparation is also provided and includes the steps of forming a solution of hydrated phosphomolybdic acid in a substantially anhydrous alkanol, evaporating the solution to form a concentrate, impregnating a catalyst support material with the concentrate, contacting the impregnated support with ammonia gas in an amount sufficient to form an insoluble precipitate of ammonium alkyl phosphomolybdic acid within the pore structure of said support material and thereafter drying and calcining said impregnated support material so as to form a coated catalyst.Type: GrantFiled: November 18, 1982Date of Patent: July 9, 1985Assignee: The Standard Oil Company (Ohio)Inventors: James L. Callahan, Wilfrid G. Shaw, Arthur F. Miller
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Patent number: 4470931Abstract: A process for conducting a combination of fixed and fluid-bed catalytic reactions is achieved by employing fixed-bed catalysts on supports within the fluid bed. The fluid-bed catalysts may move in both directions through the fixed bed, thereby giving advantages of both types of beds in one reactor.Type: GrantFiled: December 13, 1979Date of Patent: September 11, 1984Assignee: The Standard Oil CompanyInventors: James L. Callahan, Arthur F. Miller, Wilfrid G. Shaw
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Patent number: 4453006Abstract: A method for preparing attrition resistant, high percentage active component catalysts comprises using two types of silica, one of which is fumed silica, in a two stage catalyst preparation.Type: GrantFiled: February 12, 1981Date of Patent: June 5, 1984Assignee: The Standard Oil CompanyInventors: Wilfrid G. Shaw, Christos Paparizos, James L. Callahan
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Patent number: 4444906Abstract: The present invention relates to a method for the preparation of phosphomolybdic acid based catalysts by forming a solution of hydrated phosphomolybdic acid in a substantially anhydrous alkyl alcohol, adding a base to the solution, evaporating the solution to yield a catalyst powder and thereafter drying and calcining the powder to form the active catalysts. A second method for preparation is also provided and includes the steps of forming a solution of hydrated phosphomolybdic acid in a substantially anhydrous alkyl alcohol, evaporating the solution to form a concentrate, impregnating a catalyst support material with the concentrate, contacting the impregnated support with ammonia gas in an amount sufficient to form an insoluble precipitate of ammonium alkyl phosphomolybdic acid within the pore structure of said support material and thereafter drying and calcining said impregnated support material so as to form a coated catalyst.Type: GrantFiled: November 8, 1982Date of Patent: April 24, 1984Assignee: The Standard Oil CompanyInventors: James L. Callahan, Wilfrid G. Shaw, Arthur F. Miller
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Patent number: 4443555Abstract: The present invention relates to a method for the preparation of phosphomolybdic acid based catalysts by forming a solution of hydrated phosphomolybdic acid in a substantially anhydrous alkyl alcohol, heating the solution to form a concentrate, and thereafter drying and calcining the concentrate support material so as to form the catalyst. Because the catalyst is prepared in alcoholic rather than aqueous solution, it has a greater activity in converting aldehydes to their respective unsaturated carboxylic acids than known phosphomolybdic acid based catalysts. Furthermore, the deammoniation step of the prior art is no longer required.Type: GrantFiled: November 8, 1982Date of Patent: April 17, 1984Assignee: The Standard Oil CompanyInventors: James L. Callahan, Wilfrid G. Shaw, Arthur F. Miller
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Patent number: 4427792Abstract: A process is provided for the preparation of iron phosphorous mixed oxide catalysts which are highly active at moderate temperatures by introducing iron and phosphorus containing compounds and promoter element containing compounds, if any, into a substantially organic liquid medium, heating, separating the resulting precursor, drying and calcining. The catalysts are useful for the dehydrogenation or oxydehydrogenation of organic compounds such as aldehydes or carboxylic acids.Type: GrantFiled: August 10, 1981Date of Patent: January 24, 1984Assignee: The Standard Oil CompanyInventors: S. Erik Pedersen, Noel J. Bremer, James L. Callahan
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Patent number: 4341717Abstract: The present invention is a reactor that consists of a single shell that contains a reaction zone and a regeneration zone. The reaction zone and regeneration zone are arranged in such a manner that (a) a particulate solid may be transferred by flow of gases from the regeneration zone to the reaction zone by a first route and then back to the regeneration zone by a second route; and (b) the gases passing through the regeneration zone are not transferred to the reaction zone and the gases passing through the reaction zone are not transferred to the regeneration zone.Type: GrantFiled: December 8, 1978Date of Patent: July 27, 1982Assignee: The Standard Oil CompanyInventors: James L. Callahan, Harley F. Hardman, Ernest C. Milberger
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Patent number: 4335056Abstract: In the recovery of acrylonitrile from the gross reaction product produced during the commercial ammoxidation of propylene to produce acrylonitrile, an ammoxidation waste gas containing at least 65% nitrogen, carbon dioxide, carbon monoxide and a small amount of unreacted propylene is produced. In accordance with the invention, this ammoxidation waste gas is passed through a catalytic converter containing an oxidation or ammoxidation catalyst to convert the unreacted propylene into valuable product.Type: GrantFiled: January 5, 1981Date of Patent: June 15, 1982Assignee: Standard Oil CompanyInventors: James L. Callahan, Wilfrid G. Shaw, David B. Terrill
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Patent number: 4323520Abstract: The present invention relates to a process for the conversion of tertiary-butyl-containing compounds to methacrylic derivatives, and more particularly to a process for the conversion of tertiary-butyl-containing compounds selected from the group consisting of alkyl tertiary-butyl ethers, tertiary-butyl alcohol, isobutylene dimer (2,2,4-trimethylpentene) and isobutylene trimer, to methacrolein, methacrylic acid or methacrylonitrile.Type: GrantFiled: May 9, 1977Date of Patent: April 6, 1982Assignee: The Standard Oil Co.Inventors: Harley F. Hardman, James L. Callahan, Robert K. Grasselli
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Patent number: 4315838Abstract: Catalysts with improved catalytic properties are produced by a novel process in which not all of the heat-decomposable salt in the pre-catalyst is driven off during pre-heating and the powdery pre-catalyst obtained by pre-heating is agglomerated by dropping a slurry of the powder onto a particle bed.Type: GrantFiled: June 5, 1978Date of Patent: February 16, 1982Assignee: Standard Oil CompanyInventors: Arthur F. Miller, James L. Callahan, Wilfrid G. Shaw
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Patent number: 4309310Abstract: Olefins, such as propylene, are allylically oxidized to corresponding unsaturated aldehydes and carboxylic acids, such as acrolein and acrylic acid, by contacting the olefin with molecular oxygen at allylic oxidation conditions in the presence of a trifluoroalkyl sulfonate or phosphonate catalyst, such as a catalyst formed by the reaction of vanadyl oxide and trifluoromethyl sulfonate.Type: GrantFiled: March 31, 1980Date of Patent: January 5, 1982Assignee: Standard Oil CompanyInventor: James L. Callahan
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Patent number: 4303550Abstract: The present invention relates to a method for the regeneration of deactivated PMA based catalysts by imbibing an aqueous volatile base within the pore structure of the deactivated catalyst so as to form a fluid phase within the pore structure, adding a volatile acid to the fluid phase to form a precipitate. The precipitate is thereafter dried and calcined to yield the regenerated catalyst. A second method for regeneration is also provided and includes the steps of imbibing a volatile solvent within the pore structure of the deactivated catalyst, adding a volatile acid to the system, and then adding a volatile base to the system to form a precipitate within the pore structure. The precipitate is again dried and calcined to yield the regenerated catalyst.Type: GrantFiled: December 28, 1979Date of Patent: December 1, 1981Assignee: Standard Oil CompanyInventors: James L. Callahan, Wilfrid G. Shaw, Arthur F. Miller