Patents Represented by Attorney Albert Brent
  • Patent number: 5124305
    Abstract: The present invention pertains to novel phases involving FeO, V.sub.2 O.sub.3 and CaO and the method for their preparation. The solid compositions involving FeO--V.sub.2 O.sub.3 --CaO fall within the shaded area of a polygon in a ternary composition diagram of FeO, V.sub.2 O.sub.3 and CaO as shown in the drawing herein e.g., FIG. 1. The compositions may be used as a catalyst for oxidation or reduction reactions.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: June 23, 1992
    Assignee: Texaco, Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5106811
    Abstract: The present invention pertains to novel vanadium spinel materials and a method for their preparation. Each vanadium spinel material has a trivalent vanadium cation and is crystallized from a liquid having a composition that falls within a specific polygon shaped area in a ternary composition diagram of V.sub.2 O.sub.3 -FeO-SiO.sub.2 as shown in the drawing herein e.g., FIG. 1. The compositions may be used as a catalyst for oxidation reactions.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: April 21, 1992
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5102834
    Abstract: Vanadium garnet materials and a method for their preparation. The vanadium garnet material has a trivalent vanadium cation and a composition that falls within a specific prismatic-shaped volume in a quaternary composition diagram of MnO, CaO, V.sub.2 O.sub.3, and SiO.sub.2. The prismatic-shaped volume represents compositions of liquids with which said vanadium garnet is in equilibrium on the liquidus surface and from which the vanadium garnet phase is crystallized. A typical vanadium garnet material has the formula Mn.sub.1.3 Ca.sub.1.7 V.sub.2 Si.sub.3 O.sub.12, as provided in the drawing by point F. The vanadium garnet materials may be used in laser applications.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: April 7, 1992
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5094992
    Abstract: The present invention pertains to novel vanadium spinel materials and a method for their preparation. Each vanadium spinel material has a trivalent vanadium cation and is crystallized from a liquid having a composition that falls within a specific polygon shaped area in a ternary composition diagram of V.sub.2 O.sub.3 -MgO-SiO.sub.2 as shown in the drawing herein e.g., FIG. 1. The compositions may be used as a catalyst for oxidation reactions.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: March 10, 1992
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Arnulf Muan
  • Patent number: 5087271
    Abstract: This process pertains to a achieving high on-stream time and maintaining the temperature and composition of the raw effluent gas stream from a partial oxidation gas generator being fed simultaneously with a stream of gaseous fuel and separate stream of liquid hydrocarbonaceous fuel. Two parallel oxygen streams equipped with flow transmitters and control valves are used to supply the oxygen associated with two separate and different fuel streams. Each stream of oxygen is controlled by an O.sub.2 /fuel ratio control so that if the flow rate of either stream of fuel or its related oxygen stream changes, the oxygen/carbon atomic ratio of the remaining O.sub.2 and fuel stream in the gasifier is maintained at a desired value. Further, if either fuel flow is stopped, its associated O.sub.2 flow will stop, but the remaining fuel stream and its associated O.sub.2 stream will continue to flow at the same rate with no change in the oxygen/fuel weight ratio. Complete shut down of the unit is thereby avoided.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: February 11, 1992
    Assignee: Texaco Inc.
    Inventors: Robert J. Stellaccio, Michael M. Dach
  • Patent number: 5086029
    Abstract: The present invention pertains to novel vanadium spinel materials and a method for their preparation. Each vanadium spinel material has a trivalent vanadium cation and is crystallized from a liquid having a composition that falls within a specific polygon shaped area in a ternary composition diagram of V.sub.2 O.sub.3 --MnO--SiO.sub.2 as shown in the drawing herein e.g., FIG. 1. The compositions may be used as a catalyst for oxidation reactions.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: February 4, 1992
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5077260
    Abstract: The present invention pertains to novel phases involving V.sub.2 O.sub.3 and CaO and the method for their preparation. The solid compositions involving V.sub.2 O.sub.3 and CaO fall on three vertical lines and within the shaded areas of four polygons in a binary composition diagram of V.sub.2 O.sub.3 and CaO as shown in the drawing herein e.g., FIG. 1. The composition may be used as a catalyst for oxidation or reduction reactions.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: December 31, 1991
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5070065
    Abstract: The present invention pertains to novel phases involving V.sub.2 O.sub.3, Al.sub.2 O.sub.3 and CaO, and the method for their preparation. The solid compositions involving V.sub.2 O.sub.3, Al.sub.2 O.sub.3, and composition diagram of V.sub.2 O.sub.3 -Al.sub.2 O.sub.3 -CaO as shown in the drawing herein e.g., FIG. 1. The composition may be used as a catalyst for oxidation or reduction reactions.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: December 3, 1991
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5061674
    Abstract: The present invention pertains to novel solid solutions involving MnO, V.sub.2 O.sub.3 and TiO.sub.2 and the method for their preparation. The solid compositions involving MnO, V.sub.2 O.sub.3 and TiO.sub.2 fall within the shaded area of a polygon in a ternary composition diagram of MnO, V.sub.2 O.sub.3 and TiO.sub.2 as shown in the drawing herein e.g., FIG. 1. The composition may be used as an oxidation catalyst or in the manufacture of high temperature refractories.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: October 29, 1991
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5061673
    Abstract: The present invention pertains to novel solid solutions involving Cr.sub.2 O.sub.3, V.sub.2 O.sub.3 and TiO.sub.2 and the method for their preparation. The solid compositions involving Cr.sub.2 O.sub.3, V.sub.2 O.sub.3 and TiO.sub.2 fall within the shaded area of a polygon in a ternary composition diagram of Cr.sub.2 O.sub.3, V.sub.2 O.sub.3 and TiO.sub.2 as shown in the drawing herein e.g., FIG. 1. The composition may be used as an oxidation catalyst or in the manufacture of high temperature refractories.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: October 29, 1991
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5049537
    Abstract: Novel oxidation-reduction catalysts and the method for their preparation. The materials comprise stable phases involving V.sub.2 O.sub.3 and TiO.sub.2 and mixtures of said phases and have compositions that fall within specific areas in a binary composition diagram of V.sub.2 O.sub.3 and TiO.sub.2. A typical VT material has the formula V.sub.2 TiO.sub.5. A typical E material has a formula V.sub.2 Ti.sub.2 O.sub.7 ; and, a typical .eta. material has the formula V.sub.2 Ti.sub.3 O.sub.9.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: September 17, 1991
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Arnulf Muan
  • Patent number: 5043309
    Abstract: A novel oxidation catalyst or refractory and the method for its preparation. The material comprises substitutional solid solutions involving MgO, V.sub.2 O.sub.3 and TiO.sub.2 and having compositions that fall within a specific polygon in a ternary composition diagram of MgO, V.sub.2 O.sub.3 and TiO.sub.2. A typical material has the composition in Wt %; MgO 17, V.sub.2 O.sub.3 61 and TiO.sub.2 22, and consists of the phases spinel having the formula Mg.sub.1.21 V.sub.1.58 Ti.sub.0.21 O.sub.4 and pseudobrookite having the formula Mg.sub.0.20 V.sub.1.60 Ti.sub.1.20 O.sub.5.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: August 27, 1991
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Arnulf Muan
  • Patent number: 5041409
    Abstract: The present invention pertains to novel solid solutions involving FeO, V.sub.2 O.sub.3 and TiO.sub.2 and the method for their preparation. The solid compositions involving FeO, V.sub.2 O.sub.3 and TiO.sub.2 fall within the shaded area of a polygon in a ternary composition diagram of FeO, V.sub.2 O.sub.3 and TiO.sub.2 as shown in the drawing herein e.g., FIG. 1. The composition may be used as an oxidation catalyst or in the manufacture of high temperature refractories.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: August 20, 1991
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5036038
    Abstract: The present invention pertains to novel solid solutions involving NiO, V.sub.2 O.sub.3 and TiO.sub.2 and the method for their preparation. The compositions involving NiO, V.sub.2 O.sub.3 and TiO.sub.2 fall within the shaded area of a polygon in a ternary composition diagram of NiO, V.sub.2 O.sub.3 and TiO.sub.2 as shown in the drawing herein e.g., FIG. 1. The composition may be used as an oxidation catalyst or in the manufacture of high temperature refractories.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: July 30, 1991
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5021386
    Abstract: The present invention pertains to novel solid solutions involving V.sub.2 O.sub.3, ZrO.sub.2 and TiO.sub.2 and the method for their preparation. The compositions involving V.sub.2 O.sub.3, ZrO.sub.2 and TiO.sub.2 fall within the shaded area of a polygon in a ternary composition diagram of V.sub.2 O.sub.3, ZrO.sub.2 and TiO.sub.2 as shown in the drawing herein e.g., FIG. 1. These materials may be used as an oxidation catalyst or in the manufacture of high temperature refractories.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: June 4, 1991
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar
  • Patent number: 5005986
    Abstract: This invention pertains to an improved high temperature slag resistant thermocouple sheath for protecting thermocouples used to measure the temperature of synthesis gas, reducing gas, or fuel gas produced by the partial oxidation of ash-containing liquid hydrocarbonaceous and/or solid carbonaceous fuels. The protection thermocouple sheath is made from a continuous binary alloy consisting of about 30 to 70 wt. % of palladium and the remainder silver. It may be used over a temperature range of about 1000.degree. F. to 2400.degree. F.
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: April 9, 1991
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Arnulf Muan
  • Patent number: 4983296
    Abstract: Municipal sanitary sewage sludge is disposed of by an improved partial oxidation process without polluting the environment. Aqueous slurries of sewage sludge are upgraded by hydrothermal treatment, preferably while being sheared, concentrated, and then mixed with a supplemental fuel, preferably coal. A pumpable aqueous slurry of sewage sludge-coal and/or petroleum coke is thereby produced having a greater total solids and heat content (HHV) as well as containing an increased amount of sewage sludge for reacting with free-oxygen containing gas in a free-flow partial oxidation gas generator. Hot quench water or steam produced by cooling the hot raw effluent stream of synthesis gas, reducing gas or fuel gas from the gasifier may provide heat for the hydrothermal step.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: January 8, 1991
    Assignee: Texaco Inc.
    Inventors: Matthew A. McMahon, Robert M. Suggitt, Ronald J. McKeon, Albert Brent
  • Patent number: 4980320
    Abstract: Vanadium garnet material and a method for their preparation. The vanadium garnet material has a trivalent vanadium cation and a composition that falls within a specific polygon shaped area in a ternary composition diagram of V.sub.2 O.sub.3, CaO and SiO.sub.2. The polygon shaped area represents compositions of liquids with which said vanadium garnet is in equilibrium on the liquidus surface and from which the vanadium garnet phase is crystallized. A typical vanadium garnet material has the formula Ca.sub.3 V.sub.2 Si.sub.3 O.sub.12. The vanadium garnet materials may be used in laser applications.
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: December 25, 1990
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Arnulf Muan
  • Patent number: 4977130
    Abstract: A novel oxidation catalyst or refractory and the method for its preparation. The material comprises substitutional solid solutions involving V.sub.2 O.sub.3, Al.sub.2 O.sub.3 and TiO.sub.2 and having compositions that fall within a specific polygon in a ternary composition diagram of V.sub.2 O.sub.3, Al.sub.2 O.sub.3 and TiO.sub.2. A typical material has the formula Al.sub.0.65 V.sub.1.77 Ti.sub.0.69 O.sub.5.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: December 11, 1990
    Assignee: Texaco Inc.
    Inventors: Nitri S. Najjar, Arnulf Muan
  • Patent number: 4971601
    Abstract: Synthesis gas, reducing gas, or fuel gas is produced by the partial oxidation of ash-containing solid carbonaceous and/or liquid hydrocarbonaceous fuel at an autogenous temperature in the range of about 20.degree. F. to 200.degree. F. below the softening temperature of the ash in said fuel, and at a pressure in the range of about 17 to 100 atmospheres to produce a raw effluent gas stream containing entrained carbon-rich fly-ash which is separated from the effuent gas stream. A fuel mixture comprising about 20 to 100 wt. % of said carbon-rich fly-ash and about 0 to 80 wt. % of a supplemental fuel is reacted by partial oxidation at an autogenous temperature of about 100.degree. F. above the ash-fusion temperature, and at a reduced pressure e.g. in the range of about 1 to 16 atmospheres and at least 16 atmospheres below the pressure in the partial oxidation reaction used to produce said carbon-rich fly-ash.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: November 20, 1990
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Walter C. Gates, Jr.