Patents by Inventor Christos Paparizos

Christos Paparizos 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).

  • Patent number: 5183793
    Abstract: Catalysts having the general formula:V.sub.1 Bi.sub.a Sb.sub.b Fe.sub.c X.sub.d Y.sub.c Z.sub.f O.sub.gwherein,X=Mo, Cu, W, Nb, Te, P, Sn, Ge, AsY=Co, Ni, Ce, La, Mn, CrZ=Alkali, alkaline earth, B, Tl and,a=0.1-10,b=0.01-20,c=0.01-5,d=0-5,e=o-3,f=0-1, and g is determined by the valance requirements of the elements present,are produced by first forming and calcining an iron-antimony oxide composition which is subsequently combined with compounds of vanadium, bismuth and other elements. The catalysts are useful in the formation of phthalonitriles from the reaction of xylenes with oxygen and ammonia at elevated temperatures.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: February 2, 1993
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Wilfrid G. Shaw
  • Patent number: 5134105
    Abstract: Olefins such as propylene and isobutylene are converted to the corresponding unsaturated nitriles, acrylonitrile, and methacrylonitrile, respectively, by reacting a mixture of the olefin, ammonia, and molecular oxygen-containing gas in the presence of a catalyst containing the oxides of molybdenum, bismuth, iron, cobalt, nickel, and chromium, and either phosphorus or antimony or mixtures thereof, and an alkali metal or mixture thereof, and optionally one element selected from the group of an alkaline earth metal, a rare earth metal, niobium, thallium, arsenic, magnesium, zinc, cadmium, vanadium, boron, calcium, tin, germanium, manganese, tungsten, tellurium, or mixtures thereof.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: July 28, 1992
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Wilfrid G. Shaw
  • Patent number: 5012028
    Abstract: A process for converting a gaseous reactant comprising methane or natural gas to higher molecular weight hydrocarbon products is disclosed which comprises: (1) contacting said gaseous reactant with an oxidative coupling catalyst at a reaction temperature in the range of about 500.degree. C. to about 1100.degree. C. for an effective period of time to form an intermediate product comprising ethane, ethylene or a mixture thereof; and (2) pyrolyzing said intermediate product at a temperature in the range of about 900.degree. C. to about 1500.degree. C. for an effective period of time to form said higher molecular weight hydrocarbon products.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: April 30, 1991
    Assignee: The Standard Oil Company
    Inventors: Victor Gupta, Christopher L. Bodolus, Christos Paparizos, Wilfrid G. Shaw
  • Patent number: 4877898
    Abstract: 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: Grant
    Filed: June 12, 1986
    Date of Patent: October 31, 1989
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Wilfrid G. Shaw, James L. Callahan
  • Patent number: 4822940
    Abstract: The present invention provides for a process for converting a feedstock comprising ethylene and/or acetylene to a product comprising liquid hydrocarbons. The process comprises maintaining said feedstock at a temperature in the range of about 700.degree. C. to about 1000.degree. C. for about 100 to about 1000 milliseconds to provide for said conversion. In one embodiment, the feedstock further comprises hydrogen. In another embodiment the feedstock comprises the product made by the process comprising heating a gaseous mixture comprising (i) hydrogen and (ii) natural gas and/or at least one light hydrocarbon at a temperature of at least about 1250.degree. C. for an effective period of time to provide said feedstock. In still another embodiment, the feedstock further comprises natural gas and/or at least one light hydrocarbon in addition to said ethylene and/or acetylene.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: April 18, 1989
    Assignee: The Standard Oil Company
    Inventors: Alan A. Leff, Joseph E. Metcalfe, Louis J. Velenyi, Christos Paparizos
  • Patent number: 4786756
    Abstract: Disclosed is a process for the catalytic conversion of lactic acid and/or ammonium lactate to acrylic acid by contacting a mixture of water and lactic acid and/or ammonium lactate in the vapor phase with aluminum phosphate which has been treated with an aqueous inorganic base.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: November 22, 1988
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Serge R. Dolhyj, Wilfrid G. Shaw
  • Patent number: 4727205
    Abstract: The invention relates to a process for converting light hydrocarbon feedstocks such as methane and/or natural gas, to higher molecular weight hydrocarbon products that are more readily handleable and transportable. The process comprises heating a gaseous mixture comprising said light hydrocarbon feedstocks and a minor, effective amount of at least one ether or thioether compound at a temperature of at least about 800.degree. C. for a period of time effective to provide said higher molecular weight liquid hydrocarbon product. The invention also relates to the higher molecular weight liquid products obtained by the process of the invention.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: February 23, 1988
    Assignee: The Standard Oil Company
    Inventors: Louis J. Velenyi, Christos Paparizos
  • Patent number: 4727207
    Abstract: The invention relates to a process for converting light hydrocarbon feedstocks such as methane and/or natural gas, to higher molecular weight hydrocarbon products that are more readily handleable and transportable. The process comprises heating a gaseous mixture comprising said light hydrocarbon feedstocks and carbon dioxide at a temperature of at least about 600.degree. C. for a period of time effective to provide said higher molecular weight liquid hydrocarbon product. The invention also relates to the higher molecular weight liquid products obtained by the process of the invention.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: February 23, 1988
    Assignee: Standard Oil Company
    Inventors: Christos Paparizos, Wilfrid G. Shaw
  • Patent number: 4714695
    Abstract: 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: Grant
    Filed: April 16, 1986
    Date of Patent: December 22, 1987
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Wilfrid G. Shaw, James L. Callahan
  • Patent number: 4704496
    Abstract: The invention relates to a process for converting light hydrocarbon feedstocks such as methane, ethane and/or natural gas, to higher molecular weight hydrocarbon products that are more readily handleable and transportable. The process comprises heating a gaseous mixture comprising said light hydrocarbon feedstocks and at least one oxide initiator selected from the group consisting of nitrogen oxides, sulfur trioxide and mixtures thereof at a temperature of at least about 600.degree. C. for a period of time effective to provide said higher molecular weight hydrocarbon product. In one embodiment, the invention provides for a process for converting the feedstocks, to unsaturated compounds such as ethylene. The invention also relates to the higher molecular weight products obtained by the process of the invention.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: November 3, 1987
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Yihhong Song
  • Patent number: 4690777
    Abstract: Gas mixtures containing at least hydrogen and carbon monoxide are prepared by reforming hydrocarbons in the presence of a catalyst impregnated on a specially prepared porous catalyst support. In one embodiment of the present invention, methane is reformed in a process to produce a product gas mixture containing carbon monoxide and hydrogen in the presence of a catalyst comprising a porous catalytic support having a surface area greater than 1 to less than about 350 m.sup.2 /gm and a pore volume of about 0.4 to about 3 cc/gm and at least one Group VIII metal or mixture thereof on the pore surface of the support.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: September 1, 1987
    Assignee: The Standard Oil Company
    Inventors: Louis J. Valenyi, Frederick A. Pesa, Christos Paparizos
  • Patent number: 4623635
    Abstract: 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: Grant
    Filed: April 18, 1985
    Date of Patent: November 18, 1986
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Wilfrid G. Shaw, James L. Callahan
  • Patent number: 4558029
    Abstract: Compositions of the empirical formula:Mo.sub.12 P.sub.0.1-3 M.sub.0.1-3 Cu.sub.0.1-2 V.sub.0.1-2 Sb.sub.0.01-2 X.sub.0.01-2 Y.sub.a O.sub.x (I)whereM is at least one of K, Rb and Cs;X is at least one of Ba, La, Ga, Al, Ag, Cd, Ti, Tl, Hg, Pb and Zn;Y is at least one of Fe, Co, Ni, Sr, Mn, In, Ta, Ge, S and Be when a>0;a is a number of 0 to about 2; andx is a number that satisfies the valance requirements of the other elements present,are excellent catalysts for the oxidation of oxygenated C.sub.4 hydrocarbons, such as methacrolein, to methacrylic acid.
    Type: Grant
    Filed: January 11, 1985
    Date of Patent: December 10, 1985
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Robert S. Shout, Wilfrid G. Shaw
  • Patent number: 4536585
    Abstract: It is disclosed that a Pd-Tl alloy catalyst is used in making acetals and acetalic ethers from alcohols and saturated or unsaturated aldehydes, and to make cyclic acetals and cyclic acetalic ethers when reacting with diols.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: August 20, 1985
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Robert S. Shout, Wilfrid G. Shaw
  • Patent number: 4499308
    Abstract: Disclosed is the reaction acrolein or methacrolein with a mono- or dihydroxyalkane to produce a 3-alkoxypropionaldehyde or a 3-(hydroxyalkoxy)propionaldehyde in the case of acrolein; or to produce a 3-alkoxy-2-methylpropionaldehyde or a 3-(hydroxyalkoxy)-2-methylpropionaldehyde in the case of methacrolein, by contacting a mixture of the recited reactants with a particulate solid metallic catalyst comprising an alloy of palladium and cadmium.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: February 12, 1985
    Assignee: The Standard Oil Company
    Inventors: Christos Paparizos, Robert S. Shout, Wilfrid G. Shaw
  • Patent number: 4471061
    Abstract: The present invention relates to a method for maintaining the activity of PMA based catalysts during reactor shutdown by flushing the reactor with an oxide of nitrogen gas at a temperature of from about 150.degree. C. to about 370.degree. C. The method can be employed in the reactor by terminating the feed of hydrocarbon to the reactor and then flushing the reactor. The method can be employed to treat PMA based catalysts having the general formula Mo.sub.x P.sub.y A.sub.a B.sub.b C.sub.c D.sub.d E.sub.e O.sub.z wherein A is selected from the group consisting of ammonium, cesium, potassium, rubidium and thallium; B is selected from the group consisting of copper and vanadium; C is selected from the group consisting of antimony, arsenic, bismuth and tellurium; D is palladium; E is aluminum, barium, calcium, cerium, chromium, cobalt, iron, magnesium, manganese, nickel tantalum, titanium, tungsten, zinc, zirconium, chlorine and/or bromine; x can be 3 to 15, y can be 1 to 1.5; a can be 0.1 to 3; b can be 0.
    Type: Grant
    Filed: May 24, 1983
    Date of Patent: September 11, 1984
    Assignee: The Standard Oil Company
    Inventors: Wilfrid G. Shaw, Christos Paparizos, Diane G. Farrington
  • Patent number: 4453006
    Abstract: 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: Grant
    Filed: February 12, 1981
    Date of Patent: June 5, 1984
    Assignee: The Standard Oil Company
    Inventors: Wilfrid G. Shaw, Christos Paparizos, James L. Callahan
  • Patent number: 4407661
    Abstract: The octane number of unleaded gasoline is improved by the addition of a mixture of etherified phenols obtained from crude shale oil.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: October 4, 1983
    Assignee: Standard Oil Company
    Inventors: Serge R. Dolhyj, Christos Paparizos
  • Patent number: 4358610
    Abstract: Isobutyraldehyde is oxidized to methacrylic acid by contacting gaseous isobutyraldehyde with molecular oxygen at oxidative conditions in the presence of a catalyst of the empirical formula:Mo.sub.12 P.sub.0.1-3 Cu.sub.0.01-2 V.sub.0.01-3 M.sub.0.1-3 M'.sub.0.01-2 O.sub.xwhereM is at least one of K, Rb, Cs and Tl;M' is at least one of Be, Mg, Ca, Sr, Ba, Nb and Sb; andx is a positive number that satisfies the valence requirements of the other elements present.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: November 9, 1982
    Assignee: The Standard Oil Company
    Inventors: S. Erik Pedersen, Louis F. Wagner, Christos Paparizos
  • Patent number: 4347163
    Abstract: Compositions of the empirical formula:Mo.sub.12 P.sub.0.1-3 Te.sub.0.01-2 M.sub.0.1-3 M'.sub.0.01-3 X.sub.a O.sub.b (I)whereM is at least one of K, Rb and Cs;M' is at least one of Cu and V;X is at least one of Ba, Zn, Ga, Nb, Cd, Ti, Ca, Mg, Ta, Zr, Bi, Ce, Ni, Co, Cr, Fe and Tl when a >0;a is a number of 0 to about 2; andb is a number that satisfies the valence requirements of the other elements present,are excellent catalysts for the oxidation of methacrolein to methacrylic acid.
    Type: Grant
    Filed: October 3, 1980
    Date of Patent: August 31, 1982
    Assignee: Standard Oil Company
    Inventors: Wilfrid G. Shaw, Christos Paparizos