Patents Represented by Attorney Kenneth R. Priem
  • Patent number: 5536280
    Abstract: A gasoline fuel composition comprising a major portion of gasoline and a minor portion of a diphenylamine, effective to increase the octane number of the gasoline composition, represented by the formula: ##STR1## where R and R' are independently hydrogen or C.sub.9 aliphatic hydrocarbons.
    Type: Grant
    Filed: December 1, 1994
    Date of Patent: July 16, 1996
    Assignee: Texaco Inc.
    Inventors: Thomas F. DeRosa, William M. Studzinski, Joseph M. Russo, Benjamin J. Kaufman, Robert T. Hahn
  • Patent number: 5529124
    Abstract: A method for retarding the effect of water coning during the production of oil from a subterranean formation is described. The retarding occurs by injecting into the subterranean formation, at or below the oil/water interface, a polymer solution having a viscosity at least twice that of the connate water to form a zone of high viscosity about the wellbore during the oil production.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: June 25, 1996
    Assignee: Texaco Inc.
    Inventor: Rei-Nan R. Hwan
  • Patent number: 5529968
    Abstract: A process for simultaneous hydrodearomatization, hydrodesulfurization and hydrodenitrogenation of a charge hydrocarbon oil containing undesired aromatic components, sulfur and nitrogen compounds, which comprises:maintaining a bed of a sulfided metal catalyst comprising one or more metals of non-noble Group VIII, at least one metal selected from tungsten and molybdenum on a novel "phosphorus treated carbon" support, the "phosphorus treated carbon" support being comprised of phosphorus bound to the carbon surface predominantly as polyphosphate species characterized by peaks between -5 and -30 ppm in the solid-state magic angle spinning .sup.31 p nuclear magnetic resonance spectrum;passing a charge hydrocarbon feed in the presence of hydrogen into contact with said catalyst at hydrotreating conditions, thereby effecting hydrodearomatization, and simultaneously effecting hydrodesulfurization and hydrodenitrogenation.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: June 25, 1996
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Frank Dolfinger, Jr., Max R. Cesar, Mahendra S. Patel, Paul O. Fritz
  • Patent number: 5527970
    Abstract: Disclosed is an improved process for preparing ethyl t-butyl ether in one-step which comprises reacting tertiary butanol and ethanol in the presence of a catalyst consisting essentially of a macroreticular acid resin or a pentasil zeolite at a temperature of about 40.degree.-140.degree. C. and atmospheric pressure to about 500 psig.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: June 18, 1996
    Assignee: Texaco Chemical Inc.
    Inventors: Rei-Yu J. Hwan, John F. Knifton, Brian L. Benac
  • Patent number: 5527364
    Abstract: An alkylphenoxypolyoxyalkylene amine lactone composition obtained by reacting:(a) a lactone represented by the formula: ##STR1## where n is a number between about 1 and about 5; and (b) an alkylphenoxypolyoxyalkylene amine represented by the formula: ##STR2## in which R' is a hydrocarbyl radical having from about 4 to 30 carbon atoms, x represents a number from about 5 to 50, and R" represents a C.sub.2 -C.sub.5 hydrocarbyl radical or any combination of C.sub.2 -C.sub.5 hydrocarbyl radicals, such that the oxyalkylene radical can comprise any combination of repeating C.sub.2 -C.sub.5 oxyalkylene units to form block or random copolymers.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: June 18, 1996
    Assignee: Texaco Inc.
    Inventors: Joseph M. Russo, Thomas F. DeRosa, Benjamin J. Kaufman
  • Patent number: 5525211
    Abstract: Naphtha is selectively hydrodesulfurized using selectively poisoned hydrotreating catalyst to remove sulfur while minimizing loss in octane level due to olefin saturation.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: June 11, 1996
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Max R. Cesar, R. Anthony Heinrich
  • Patent number: 5523509
    Abstract: Synthetic manganese oxide octahedral molecular sieves, e.g., OMS-1 and OMS-2, are employed as acid-base catalysts in a variety of acid-base organic conversion reactions.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: June 4, 1996
    Assignee: Texaco Inc.
    Inventors: Chi-Lin O'Young, Robert A. Sawicki, Yan-Fei Shen, Steven L. Suib
  • Patent number: 5520251
    Abstract: An improved method for preventing iron precipitation from a spent oil well acidizing solution is disclosed. The acidizing solution is preceded into the tubular goods and formation by the injection of an iron sensitive, acid insensitive acidified surfactant solution.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: May 28, 1996
    Assignee: Texaco Inc.
    Inventors: Billy W. Surles, Mark D. Looney
  • Patent number: 5518341
    Abstract: The present invention concerns a system for providing storage for hydrocarbons produced at an offshore production facility. A tank assembly having inner and outer tanks defining an annular chamber therebetween and the inner tank defining an inner chamber, has a piling projection extending from one end thereof. A first piping system is connected to the annular chamber and input piping system connected to the inner chamber and an output piping system connected to the inner chamber. The outer chamber is flooded to provide ballast for the system during and after placement of the piling into the soil beneath a platform.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: May 21, 1996
    Assignee: Texaco Inc.
    Inventor: Allen J. Verret
  • Patent number: 5515794
    Abstract: An improved burner for partial oxidation process gas generators is provided which has annular passages formed between coaxially aligned conduits extending from upstream sources to the downstream reaction zone. An outer coolant jacket, internally baffled from optimum coolant flow and sized for minimum downstream area surrounds a recessed and fuel/oxidizer delivery conduit ending in a nozzle. The central delivery conduit is not attached to the coolant jacket and the annular space between them is connected to a high pressure supply of relatively inert gas which can periodically be vented through the annular space to prevent slag build up on the nozzle or coolant jacket.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: May 14, 1996
    Assignee: Texaco Inc.
    Inventors: Jerrold S. Kassman, Allen M. Robin, John D. Winter, James K. Wolfenbarger
  • Patent number: 5514273
    Abstract: Heavy oils may be hydrotreated in the presence of a porous alumina support bearing metals of Group VIII, excluding cobalt, and VI-B and optionally phosphorus, the catalyst having a Total Surface Area of 240-320 m.sup.2 /g, a Total Pore Volume of 0.65-0.9 cc/g, and a Pore Diameter Distribution whereby 50-62.8% of the Total Pore Volume is present as micropores of diameter 55-115 .ANG. and 20-30.5% of the Total Pore Volume is present as macropores of diameter greater than 250 .ANG..The heavy oils and hydrogen are contacted with the catalyst such that the catalyst is maintained at isothermal conditions and is exposed to a uniform quality of feed. The process is particularly effective in achieving desired levels of hydroconversion of feedstock components having a boiling point greater than 1000.degree. F. to products having a boiling point less than 1000.degree. F.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: May 7, 1996
    Assignee: Texaco Inc.
    Inventors: David E. Sherwood, Jr., Pei-Shing E. Dai, Charles N. Campbell, II
  • Patent number: 5512190
    Abstract: The present invention provides a lubricating oil additive which provides anti-wear properties to a lubricating oil. The additive is the reaction product of 2,5-dimercapto-1,3,4-thiadiazole and a mixture of unsaturated mono-, di-, and tri-glycerides. The present invention also provides a lubricating oil additive with anti-wear properties produced by reacting a mixture of unsaturated mono-, di-, and tri-glycerides with diethanolamine to provide an intermediate reaction product and reacting the intermediate reaction product with 2,5-dimercapto-1,3,4-thiadiazole.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: April 30, 1996
    Assignee: Texaco Inc.
    Inventors: Gregory P. Anderson, Julian H. Dancy, Doris Love, Jayne M. Lucas
  • Patent number: 5509943
    Abstract: The present invention provides a novel class of compounds, useful as gasoline detergent additives, comprising hydrocarbyloxypolyether allophonate esters of 2-hydroxy ethane. The present invention also provides a motor fuel composition containing the novel allophonate esters and further provides a method of synthesizing the allophonate esters of the present invention.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: April 23, 1996
    Assignee: Texaco Inc.
    Inventors: Sheldon Herbstman, Constance A. Cadorette
  • Patent number: 5509478
    Abstract: A method has been discovered for determining the quality of steam reading a subterranean formation through a well bore. The steam is passed through a choke which imparts critical flow characteristics. A turbine meter is calibrated at the surface at known conditions and then positioned in the well where the steam quality value is required. The turbine meter is used in combination with the Saturated Steam Table to determine steam quality.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: April 23, 1996
    Assignee: Texaco Inc.
    Inventor: James R. Stoy
  • Patent number: 5501278
    Abstract: Production from a producing oil well is increased by forming a pumping string with pipe sections of small diameter and high tensile strength at the top and large diameter low tensile strength at the bottom of the well.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: March 26, 1996
    Assignee: Texaco Inc.
    Inventors: Kenneth D. Garrett, Norman D. Rogers
  • Patent number: 5500401
    Abstract: A method of selectively hydrodenitrogenating various raw hydrocarbon oils such as various petroleum feedstocks, coal liquids, shale oils and sand oils, which method comprises passing the raw hydrocarbon oil along with hydrogen (H.sub.2) over sulfided carbon supported Fe-Mo catalysts, whereby the raw hydrocarbon oil is hydrodenitrogenated with a selectivity significantly higher than that is possible with conventional alumina supported hydrotreating catalysts.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: March 19, 1996
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Gerald G. Sandford, Frank Dolfinger, Jr.
  • Patent number: 5498586
    Abstract: Disclosed is a hydrotreating catalyst which comprises a porous alumina support bearing metals of Group VIII and VI-B and optionally phosphorus, the catalyst having a Total Surface Area of 240-310 m.sup.2 /g, a Total Pore Volume of 0.5-0.75 cc/g, and a Pore Diameter Distribution whereby 63-78% of the Total Pore Volume is present as micropores of diameter 55-115 .ANG. and 11-18% of the Total Pore Volume is present as macropores of diameter greater than 250 .ANG., said catalyst being particularly effective in achieving desired levels of hydroconversion of feedstock components having a boiling point greater than 1000.degree. F. to products having a boiling point less than 1000.degree. F.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: March 12, 1996
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, David E. Sherwood, Jr.
  • Patent number: 5497832
    Abstract: A system for improving the economics of production by reducing lifting costs of a producing well utilizes the upstroke of a pump to produce a fluid mixture of primarily oil with only a fraction of the produced water and the downstroke to inject the remaining produced water beneath a packer into a lower formation.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: March 12, 1996
    Assignee: Texaco Inc.
    Inventors: Lon A. Stuebinger, Kevin R. Bowlin, Carlos W. Pardo
  • Patent number: 5498827
    Abstract: A process for upgrading plastic material containing inorganic filler or reinforcement material for use as feedstock in partial oxidation gas generator for the production of raw synthesis gas, fuel gas, or reducing gas. The plastic material is granulated and mixed with water to produce the plastic sludge. The plastic sludge is preheated at a temperature in the range of about 350.degree. F. to 475.degree. F. in the absence of air in a closed system. The preheated plastic sludge is then hydrothermally treated at a temperature in the range of about 450.degree. F. to 650.degree. F. at a pressure in the range of about 100 to 1200 psig and above the vapor pressure of water at that temperature. The hydrothermally treated plastic sludge is cooled, degassed, and mixed with ground solid carbonaceous fuel, e.g., coal and water, to produce a pumpable aqueous slurry having a solids content in the range of about 40 to 60 wt. %.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: March 12, 1996
    Assignee: Texaco Inc.
    Inventors: Motasimur R. Khan, Christine C. Albert, Stephen J. DeCanio
  • Patent number: 5496448
    Abstract: An evaporator, which includes a water chamber for receiving water to be evaporated. A plurality of evaporator tubes which when heated, and when water is on an inner wall of a tube, evaporates at least a portion of that water. A plurality of distributors spatially connecting the water chamber with the evaporator tubes in a manner so that each distributor uniformly and distributes the water from the water chamber to an inner wall of a corresponding evaporator tube. A heat source, which heats the plurality of tubes to an evaporation temperature. Apparatus distills the water vapor resulting from the water evaporation to provide distilled water.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: March 5, 1996
    Assignee: Texaco Inc.
    Inventor: Dinh-Cuong Vuong