Patents Represented by Attorney Douglas H. May
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Patent number: 5336790Abstract: A process for recovery of molybdenum from residual fractions derived from an epoxidation reaction of propylene with tertiary butyl hydroperoxide in liquid phase with tertiary butyl alcohol, in the presence of soluble molybdenum, which process comprises:Fractionating epoxidation reaction product for obtaining a liquid fraction containing essentially all molybdenum from the reaction product;Contacting the liquid fraction with anhydrous ammonia for forming a precipitate containing the major portion of the molybdenum and a liquid phase containing 500 ppm or less molybdenum;Separating the liquid phase from the precipitated solid;Evaporating the liquid phase under conditions of elevated temperatures and reduced pressure in the presence of 1 to 3% water for separation into an evaporator overhead vapor essentially free of molybdenum and an evaporator concentrate comprising essentially all of the molybdenum fed to the evaporator;Rapidly cooling evaporator concentrate from about evaporation temperature to about room teType: GrantFiled: November 18, 1993Date of Patent: August 9, 1994Assignee: Texaco Chemical CompanyInventors: Edward T. Marquis, Howard F. Payton, Robert A. Meyer
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Patent number: 5291746Abstract: A refrigerated container for receiving, storing, and transporting materials without necessity of personnel contacting the materials after deposit in the container. The container is particularly adapted for use with medical wastes which may contain infectious materials. The container comprises a lower portion and a lid portion. The container lower portion includes an open-topped inner box for holding waste materials, and an open-topped insulated outer box surrounding and spaced apart from the inner box forming an annular space therebetween. The lid is releasably attached to the outer box and has doors for access into the inner box of the container. A refrigeration unit and air circulation fan are attached to the lid, and are in communication with the annular space for cooling the inner box by circularing refrigerated air through the annular space.Type: GrantFiled: March 10, 1993Date of Patent: March 8, 1994Inventor: Derwood C. Abbott
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Patent number: 5290527Abstract: A process for recovery of molybdenum from residual fractions derived from an epoxidation reaction of propylene with tertiary butyl hydroperoxide in liquid phase with tertiary butyl alcohol, in the presence of soluble molybdenum, which process comprises:Fractionating epoxidation reaction product for obtaining a liquid fraction containing essentially all molybdenum from the reaction product;Contacting the liquid fraction with anhydrous ammonia for forming a precipitate containing the major portion of the molybdenum and a liquid phase containing 500 ppm or less molybdenum;Separating the liquid phase from the precipitated solid;Evaporating the liquid phase under conditions of elevated temperatures and reduced pressure in the presence of 1 to 3% water for separation into an evaporator overhead vapor essentially free of molybdenum and an evaporator concentrate comprising essentially all of the molybdenum fed to the evaporator;Rapidly cooling evaporator concentrate from about evaporation temperature to about room teType: GrantFiled: November 5, 1992Date of Patent: March 1, 1994Assignee: Texaco Chemical CompanyInventors: Edward T. Marquis, Howard F. Payton, Robert A. Meyer
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Patent number: 5281024Abstract: A method for locating surface deposits of porous, permeable soils having high percolation rates at locations having both permeable and impermeable soils present. During warmer periods of the year, when ambient atmospheric temperatures and soil temperatures are higher than the annual mean temperatures for the location, earth surface temperatures are measured at a plurality of points within a location. Points having relatively higher temperatures are identified as likely to have surface soils more porous and permeable than soils at points having relatively lower temperatures. The porosity and permeability of the soils at selected points may be quantified by testing the soil's percolation rates.Type: GrantFiled: November 30, 1992Date of Patent: January 25, 1994Inventor: Lloyd C. Fons
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Patent number: 5274138Abstract: An epoxidation reaction wherein: an olefin and an organic hydroperoxide, preferably, propylene and tertiary butyl hydroperoxide are reacted in a primary reaction zone in a liquid phase with an organic solvent, preferably tertiary butyl alcohol, in the presence of a soluble molybdenum catalyst at a ratio of propylene to tertiary butyl hydroperoxide of from about 0.9:1 to about 3:1, at a reaction temperature from about 100.degree. C. to about 140.degree. C.Type: GrantFiled: January 21, 1993Date of Patent: December 28, 1993Assignee: Texaco Chemical CompanyInventors: Kenneth P. Keating, Edward T. Marquis, Mark A. Mueller
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Patent number: 5209368Abstract: An insulated tank construction for a water heater, including a cylindrical tank, a cylindrical shell placed around and spaced radially apart from the tank to form an annular space, and a ring-shaped form dam disposed circumferentially at a selected position in the annular space along the height of the tank. The foam dam is comprised of a resilient compressible material, preferably porous, open-cell polyurethane foam, and has an inner diameter less than the tank outer diameter and an outer diameter greater than the shell inner diameter. Thus, the foam dam is compressed into sealing engagement with both the tank wall and the shell wall. The shell inner wall, foam dam and tank outer wall form an annular chamber within the annular space. Expandable polymer foam material is injected into the annular chamber and expanded to form a jacket of insulating foam around the tank. Initially, gasses generated by expansion of the foam escape the annular chamber through the porous body of the foam dam.Type: GrantFiled: June 9, 1992Date of Patent: May 11, 1993Inventor: Kenneth A. Bradenbaugh
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Patent number: 4675852Abstract: A down-hole signal generator for a mud-pulse telemetry system comprises an annular impeller surrounding a casing and arranged to be driven by the mud passing along the drill string. The impeller serves to drive a torque control arrangement, and preferably also an electrical generator, within the casing. The torque control arrangement is switchable between two states by a signalling actuator in response to an electrical input signal. In a first state the impeller may be driven relatively easily so that it is rotated at a relatively fast speed by the mud flow, whereas, in a second state, a greater torque is required to drive the impeller so that it is rotated at a relatively slow speed. Thus suitable variation of the input signal may be used to vary the impeller speed to transmit a modulated pressure signal in the mud flow which may be sensed at the surface.Type: GrantFiled: November 14, 1984Date of Patent: June 23, 1987Assignee: NL Industries, Inc.Inventors: Michael K. Russell, Anthony W. Russell
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Patent number: 4453605Abstract: Disclosed is a method and apparatus for mechanically and metallurgically holding a cutter in a drill bit pocket. The method includes using powder metallurgy techniques in the formation of a drill bit member having a plurality of pockets configured to inhibit displacement of cutters out of the pockets in a direction transverse to the drill bit working surface. The method further includes the steps of metallurgically bonding and mechanically engaging the cutter with the cutter pocket. The drill bit manufactured in accordance with the methods of the present invention include a carbide menstrum drill bit head having a working surface with a plurality of fluid courses and nozzles thereon in adjacent relationship with a plurality of cutter blade bands comprising a series of cutter pockets having cutters disposed therein in a fashion parallel with the working surface.Type: GrantFiled: April 30, 1981Date of Patent: June 12, 1984Assignee: NL Industries, Inc.Inventor: Lot W. Short, Jr.
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Patent number: 4220623Abstract: A fluidized catalytic cracking unit wherein cyclone diplegs extend from the reactor vessel into the stripping vessel, for reducing the overall height of the unit. Valve means are provided at the lower end of the diplegs to prevent blow by of gas through the diplegs. The diplegs pass through the vent lines.Type: GrantFiled: March 29, 1978Date of Patent: September 2, 1980Assignee: Texaco Inc.Inventors: Frederick C. Jahnke, John P. MacLean, Dale Williams, John D. Brown
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Patent number: 4216076Abstract: A method for preventing fouling of equipment used in hydrocarbon processing is provided comprising adding to said hydrocarbon a polyalkyleneoxy sulfoxy salt represented by the formula: ##STR1## wherein R is a linear alkyl radical having from about 6 to 15 carbon atoms or an alkyl phenyl radical wherein the alkyl group contains from about 8 to 10 carbon atoms, R.sub.1 is H or CH.sub.3, n is a number from 3 to 8, x is 3 or 4 and M.sup.+ is an ammonium or an alkali metal cation.An antifouling formulation is also provided which comprises an alcohol-water dispersion of the above antifouling agent and a surfactant comprising a fatty acid dialkanol amide.Type: GrantFiled: July 16, 1979Date of Patent: August 5, 1980Assignee: NL Industries, Inc.Inventors: Edward T. Dillon, Lloyd W. Duncan
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Patent number: 4194915Abstract: Additives useful in producing foundry mold and core washes comprise either: a mixture of 66.75% to 80.05% of an organophilic clay and 19.95% to 33.25% of an alcohol soluble, hexane insoluble thermoplastic resin skin-forming agent; or 7.15% to 15.25% of an organophilic clay, 2.85% to 4.75% of the skin forming agent, and 80% to 90% of a refractory material having a particle size fo 200 mesh or finer.Type: GrantFiled: January 3, 1978Date of Patent: March 25, 1980Assignee: N L Industries, Inc.Inventor: Roderick B. Perkins
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Patent number: 4191640Abstract: An improved dual fractionating process for hydrocarbons which employs a high pressure and a low pressure fractionating zone, light ends from the low pressure fractionating zone being introduced into the high pressure fractionating zone, heavy ends from the high pressure fractionating zone being introduced into the low pressure fractionating zone, the improvement being characterized by the introduction into one of the fractionating zones of a stable hydrocarbon stream, the hydrocarbon stream being stable under the conditions existing in the high pressure fractionating zone, at least a portion of the hydrocarbon stream having a boiling point lower than the boiling point of at least one of the unstable components which accumulates in the high pressure fractionating zone.Type: GrantFiled: June 26, 1978Date of Patent: March 4, 1980Assignee: Texaco Inc.Inventors: David D. Chess, Clements A. Helbling, Jr., Randlow Smith
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Patent number: 4172842Abstract: A process for conversion of hydrogen and carbon monoxide into hydrocarbons in the presence of an ebullient bed of catalyst comprising reduced iron oxide promoted with potassium equivalent to 2-10 pounds potassium carbonate per 1000 pounds iron oxide catalyst, and having an average particle size in the range of 100-1000 microns, wherein the catalyst is chlorided for increasing the yield of C.sub.1 -C.sub.4 range hydrocarbons.Type: GrantFiled: December 29, 1977Date of Patent: October 30, 1979Assignee: Texaco Inc.Inventors: Warren G. Schlinger, William L. Slater
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Patent number: 4138219Abstract: Apparatus for the regeneration of fluidized solid catalyst including a regeneration chamber adapted to hold a fluidized solids bed, oxygen containing gas source communicating with the chamber, a tangential inlet communicating with the regeneration chamber to impart a swirling motion to spent catalyst entering the regeneration chamber and a free standing drawoff conduit disposed within the regeneration chamber, the drawoff conduit having an upper, open end in communication with the solids bed, the open end being formed by an obliquely truncated, outwardly flared portion of the conduit, the high portion of said truncated conduit lying closest the spent catalyst inlet.Type: GrantFiled: July 5, 1977Date of Patent: February 6, 1979Assignee: Texaco Inc.Inventors: James H. Colvert, John P. MacLean, Dale Williams, Henry B. Jones
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Patent number: 4132658Abstract: A process for manufacturing high dropping point aluminum complex soap thickened greases having selected consistency, water resistance, rheopectic properties, and antiwear properties.Type: GrantFiled: March 27, 1978Date of Patent: January 2, 1979Assignee: Texaco Inc.Inventors: Richard L. Coleman, Arnold C. Witte, Jr., Aubrey L. Stone
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Patent number: 4128472Abstract: A solvent dewaxing process for removing wax from intermediate grade waxy petroleum distillate oils wherein a waxy oil stock, prediluted with 0-2 volumes dewaxing solvent is heated to a temperature in the range of about 110 to 130.degree. F for melting all wax therein; wherein the heated waxy oil stock/solvent mixture is cooled to about 5.degree. F above the depressed cloud point and is diluted with 1-5 volumes dewaxing solvent having a temperature 25.degree.-40.degree. F below the depressed cloud point for forming a wax/oil/solvent mixture having a temperature 5.degree.-15.degree. F below the depressed cloud point, and wherein the wax/oil/solvent mixture is further cooled at 1.degree.-8.degree. F/min. to a selected separation temperature in the range of 0 to -40.degree. F for precipitating additional wax. Precipitated wax is removed at the separation temperature to produce a wax free oil/solvent mixture which is subsequently fractionated to yield a dewaxed oil suitable for use in lubricating oils.Type: GrantFiled: July 5, 1977Date of Patent: December 5, 1978Assignee: Texaco Inc.Inventors: Charles W. Harrison, Paul P. Bozeman, Jr., deceased
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Patent number: 4125497Abstract: An improved method of manufacturing shaped objects from cement wherein cement is wetted with an aqueous solution of an acetone-formaldehyde resin, optionally including a water-soluble alcohol, the wet mixture molded to the desired shape and then cured preferably at a temperature within the range of 30.degree. C to 100.degree. C, wherein the bending strength of the finished product is improved by incorporating a metal soap in the composite prior to molding the wet mixture.Also disclosed is an improved composition of matter comprising Portland cement, an acetone-formaldehyde resin and a metal soap, and optionally containing an inorganic aggregate.Type: GrantFiled: May 27, 1976Date of Patent: November 14, 1978Assignee: Deutsche Texaco AktiengesellschaftInventors: Friedrich Josten, Martin Cherubim, Karl-Heinz Renkes
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Patent number: 4119149Abstract: A process for enhanced recovery of petroleum from subterranean formations is disclosed, wherein steam is injected into a formation via an injection well, and a mixture of petroleum and steam condensate is produced via a production well, wherein the produced mixture is flashed for production of a steam-distilled hydrocarbon fraction, and wherein the steam distilled hydrocarbon fraction is injected, with additional steam, into a subterranean formation for increased recovery of petroleum. The process disclosed is particularly useful in recovery of heavy (low API gravity) petroleum.Type: GrantFiled: December 20, 1976Date of Patent: October 10, 1978Assignee: Texaco Inc.Inventors: Ching H. Wu, Alfred Brown, Wilbur L. Hall
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Patent number: 4115241Abstract: A solvent dewaxing process wherein a waxy oil charge, heated for melting wax therein, is cooled to a temperature about 5.degree.-15.degree. F below the cloud point, wherein the cooled waxy oil charge is mixed under conditions of good mixing with solvent having a temperature 20.degree.-40.degree. F above a selected separation temperature in a solvent to oil ratio of about 1:1 to 5:1 for precipitating wax from the resulting mixture, and wherein the wax/oil/solvent mixture is further cooled in a second cooling zone at a rate of ca. 1.degree.-8.degree. F./min to said selected separation temperature for precipitating additional wax. Precipitated wax is separated from the mixture at the separation temperature, producing a wax free solvent-oil solution. Dewaxed oil is recovered by fractionation from the wax free solvent-oil solution.Type: GrantFiled: July 5, 1977Date of Patent: September 19, 1978Assignee: Texaco Inc.Inventors: Charles W. Harrison, Paul P. Bozeman, Jr., deceased
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Patent number: 4115243Abstract: A process for dewaxing heavy distillate and residual petroleum oil stocks wherein a waxy oil stock, prediluted with 1-2.5 volumes dewaxing solvent, is cooled to about the depressed cloud point, wherein the cooled, prediluted waxy oil stock is treated with dewaxing solvent, in increments of 0.3-1.5 volumes each to a total dilution of 3.5 to 4 volumes solvent, under conditions of good mixing and cooling at about 1.degree.-8.degree. F/min, to a desired separation temperature for precipitating wax crystals and producing a dewaxed oil.Type: GrantFiled: July 5, 1977Date of Patent: September 19, 1978Assignee: Texaco Inc.Inventors: Charles W. Harrison, Herbert J. Pitman, Avilino Sequeira