Patents by Inventor Yulin Wu

Yulin Wu 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: 4460482
    Abstract: A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises an amine, a hydrocarbon or alcohol diluent and carbon dioxide. The composition can be prepared by pressuring carbon dioxide gas into a solution of the amine. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal.
    Type: Grant
    Filed: September 1, 1981
    Date of Patent: July 17, 1984
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4435596
    Abstract: A method for producing terephthalic acid from potassium benzoate in which the potassium benzoate is charged to the reactor in powdered form as a low viscosity slurry of potassium benzoate in terphenyl.
    Type: Grant
    Filed: August 23, 1982
    Date of Patent: March 6, 1984
    Assignee: Phillips Petroleum Company
    Inventors: Yulin Wu, Ernest A. Zuech
  • Patent number: 4430511
    Abstract: A low viscosity slurry of aggregates of crystals in a dispersant is prepared by first making aggregates of crystals by the method of direct precipitation, the shape of the aggregates being granular, and then mixing the aggregates and the dispersant.
    Type: Grant
    Filed: August 23, 1982
    Date of Patent: February 7, 1984
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4357257
    Abstract: A low viscosity slurry is prepared by first making a powder such that the shape of the particles of the powder is granular and then mixing the powder and a suitable dispersant.
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: November 2, 1982
    Assignee: Phillips Petroleum Company
    Inventors: Yulin Wu, Ernest A. Zuech
  • Patent number: 4356105
    Abstract: A low viscosity slurry of aggregates of crystals in a dispersant is prepared by first making aggregates of crystals by the method of direct precipitation, the shape of the aggregates being granular, and then mixing the aggregates and the dispersant.
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: October 26, 1982
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4328372
    Abstract: Ketal and hemiketal found in the reaction mass resulting from the acid catalyzed cleavage of cyclohexylbenzene hydroperoxide in the presence of alcohol are removed from the reaction mass resulting upon the acid catalyzed cleavage by separating an organic layer from said mass and treating said organic layer with an acid thus improving the yield of cyclohexanone, recovering alcohol and facilitating ensuing purification operations.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: May 4, 1982
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4282382
    Abstract: A process for preparation of cyclohexylbenzene hydroperoxide comprising reacting cyclohexylbenzene with oxygen in a diluent consisting essentially of cyclohexane under conditions suitable for converting said cyclohexylbenzene to cyclohexylbenzene hydroperoxide.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: August 4, 1981
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4276200
    Abstract: Organic hydroperoxides are prepared by reacting an organic compound with oxygen in the presence of a novel catalyst comprising metallic silver supported upon an inorganic support selected from the oxides and carbonates of metals of Groups IIa, IIb, IIIb, and IVb.
    Type: Grant
    Filed: November 14, 1979
    Date of Patent: June 30, 1981
    Assignee: Phillips Petroleum Company
    Inventors: Yulin Wu, Marvin M. Johnson, Gerhard P. Nowack
  • Patent number: 4276223
    Abstract: Vicinal epoxides having 2 to 30 carbon atoms per molecule are prepared by heating the corresponding carbonate esters having the general formula ##STR1## in the presence of a catalytic amount of a catalyst selected from the group consisting of phosphonium halides, sulfonium halides, sulfoxonium halides and metal salts selected from the group consisting of the halides, sulfates and carboxylates having 1 to 20 carbon atoms of iron, tin, manganese and zinc.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: June 30, 1981
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4269734
    Abstract: Organic hydroperoxides are prepared by reacting an organic compound with oxygen in the absence of light and in the presence of a suitable nickel or copper porphine complex.
    Type: Grant
    Filed: January 24, 1980
    Date of Patent: May 26, 1981
    Assignee: Phillips Petroleum Company
    Inventors: Michael E. Coltrin, Yulin Wu
  • Patent number: 4266046
    Abstract: Cyclic carbonate esters are reacted with polycarboxylic acids to produce bis(hydroxyalkyl) esters from aromatic polycarboxylic acids in the presence of selected catalysts comprising at least one of phosphines, phosphonium halides, sulfonium halides, sulfoxonium halides, and ammonium and alkyl ammonium halides. In the preferred embodiment, ethylene carbonate is reacted with terephthalic acid to produce bis(2-hydroxyethyl) terephthalate and/or polymers thereof.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: May 5, 1981
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4257966
    Abstract: Vicinal epoxides having 2 to 30 carbon atoms per molecule are prepared by heating the corresponding carbonate esters having the general formula ##STR1## in the presence of a catalytic amount of a catalyst selected from the group consisting of phosphonium halides, sulfonium halides, sulfoxonium halides and metal salts selected from the group consisting of the halides, sulfates and carboxylates having 1 to 20 carbon atoms of iron, tin, manganese and zinc.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: March 24, 1981
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4246177
    Abstract: Dihydropyrans, such as 3,4-dihydro-4-methyl-2[H]-pyran, are prepared from unsaturated alcohols, such as 3-methyl-3-buten-1-ol, by reaction with carbon monoxide and hydrogen employing a Group VIII or VIB catalyst.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: January 20, 1981
    Assignee: Phillips Petroleum Company
    Inventors: Yulin Wu, Ernest A. Zuech
  • Patent number: 4234752
    Abstract: An alcohol which can be straight chain or branch-chain and can contain from 2 to about 20 carbon atoms per molecule is dehydrated in the presence of gamma-alumina, which may be base-treated, employing an inert carrier gas. 3-Methyl-1-butanol was dehydrated over gamma-alumina employing nitrogen as the carrier gas to obtain yields well in excess of 90 percent with correspondingly high selectivities. 3-Methyl-1-butene having a 97.7 weight percent purity was obtained with base-treated gamma-alumina.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: November 18, 1980
    Assignee: Phillips Petroleum Company
    Inventors: Yulin Wu, Stanley J. Marwil
  • Patent number: 4230885
    Abstract: Mixture of salts of aromatic mono- or polycarboxylic acids are converted to terephthalate salts in presence of selected catalyst or catalyst mixture, e.g., a mixture of potassium, sodium and cesium benzoates, is disproportionated in the presence of zinc and/or a zinc salt or a mixture of zinc and/or cadmium and a zinc and/or cadmium salt. The mixture of compounds which are to be converted to terephthalate salts will contain at least those of two different alkali metals. A formula m+n is equal to at least 4 is given for determining the catalyst, or catalysts, to be employed. In one embodiment, now preferred, a mixture of sodium, potassium, and cesium benzoates is heated at a reaction temperature of the order of 350.degree.-430.degree. C., more preferably 380.degree.-415.degree. C., in presence of a catalytic mixture of zinc and cadmium benzoates to obtain high yields and rates of reaction at temperatures substantially below those needed in the prior art for similar or better yields, etc.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: October 28, 1980
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4219683
    Abstract: Olefinically unsaturated compounds, such as nitriles, alcohols, esters, ethers and the like are isomerized to other unsaturated compounds in the presence of a palladium-thorium oxide catalyst and hydrogen.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: August 26, 1980
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4202992
    Abstract: Organic hydroperoxides are prepared by reacting an organic compound with oxygen in the absence of light and in the presence of a suitable nickel or copper porphine complex.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: May 13, 1980
    Assignee: Phillips Petroleum Company
    Inventors: Michael E. Coltrin, Yulin Wu
  • Patent number: 4201875
    Abstract: Organic hydroperoxides are prepared by reacting an organic compound with oxygen in the presence of a novel catalyst comprising metallic silver supported upon an inorganic support selected from the oxides and carbonates of metals of Groups IIa, IIb, IIIb, and IVb.
    Type: Grant
    Filed: August 1, 1978
    Date of Patent: May 6, 1980
    Assignee: Phillips Petroleum Company
    Inventors: Yulin Wu, Marvin M. Johnson, Gerhard P. Nowack
  • Patent number: 4192810
    Abstract: Vicinal epoxides having 2 to 30 carbon atoms per molecule are prepared by heating the corresponding carbonate esters having the general formula ##STR1## in the presence of a catalytic amount of a catalyst selected from the group consisting of phosphonium halides, sulfonium halides, sulfoxonium halides and metal salts selected from the group consisting of the halides, sulfates and carboxylates having 1 to 20 carbon atoms of iron, tin, manganese and zinc.
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: March 11, 1980
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu
  • Patent number: 4147726
    Abstract: An organic hydroperoxide is hydrolyzed by acid-catalysis in a reaction medium comprising essentially a mixture of a polar solvent, e.g. a low boiling, low molecular weight alcohol and/or sulfolane and phenol. Specifically cyclohexanone and phenol are obtained from cyclohexylbenzene hydroperoxide.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: April 3, 1979
    Assignee: Phillips Petroleum Company
    Inventor: Yulin Wu