Patents Represented by Attorney Allen H. Uzzell
  • Patent number: 4330390
    Abstract: An improved coal liquefaction process is disclosed wherein subdivided coal is substantially dissolved in a petroleum-derived solvent in the presence of added hydrogen in a non-catalytic dissolving stage at a temperature in the range 400.degree.-480.degree. C., thereby forming a mixture of dissolved coal, solvent and insoluble solids. The effluent mixture of solvent, dissolved coal and insoluble solids from the dissolver is contacted with a hydrocracking catalyst under hydrocracking conditions at a reduced temperature below 425.degree. C., resulting in a product having a normally liquid portion which may be used directly as a low-sulfur, low-nitrogen fuel oil.
    Type: Grant
    Filed: February 14, 1979
    Date of Patent: May 18, 1982
    Assignee: Chevron Research Company
    Inventors: Joel W. Rosenthal, Arthur J. Dahlberg
  • Patent number: 4330393
    Abstract: An improved coal liquefaction process is disclosed wherein subdivided coal is substantially dissolved in a petroleum-derived solvent in the presence of added hydrogen in a non-catalytic dissolving stage at a temperature in the range 400.degree. to 480.degree. C., thereby forming a mixture of dissolved coal, solvent and insoluble solids. The effluent mixture of solvent, dissolved coal and insoluble solids from the dissolver is contacted with a hydrocracking catalyst under hydrocracking conditions at a reduced temperature below 425.degree. C., resulting in a product having a normally liquid portion which may be used directly as a low-sulfur, low-nitrogen fuel oil.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: May 18, 1982
    Assignee: Chevron Research Company
    Inventors: Joel W. Rosenthal, Arthur J. Dahlberg
  • Patent number: 4330389
    Abstract: Disclosed is a two-stage process for the production of liquid hydrocarbons from coal. More particularly, disclosed is a two-stage coal liquefaction process wherein subdivided coal is substantially dissolved in a solvent in a first non-catalytic dissolving stage at the temperature in the range 750.degree. to 900.degree. F. In a second stage, the mixture of solvent, dissolved coal and insoluble solids is contacted with a hydrocracking catalyst at a critical temperature below 800.degree. F. The normally liquid portion of the hydrocracker effluent product has a surprisingly low sulfur content of less than 0.1 weight percent, a low nitrogen content of less than 0.5 weight percent, and a high API gravity of at least -3.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: May 18, 1982
    Assignee: Chevron Research Company
    Inventors: Joel W. Rosenthal, Arthur J. Dahlberg
  • Patent number: 4330391
    Abstract: Disclosed is a two-stage process for the production of liquid hydrocarbons from coal. More particularly, disclosed is a two-stage coal liquefaction process wherein subdivided coal is substantially dissolved in a solvent in a first non-catalytic dissolving stage at the temperature in the range 750.degree. to 900.degree. F. In a second stage, the mixture of solvent, dissolved coal and insoluble solids is contacted with a hydrocracking catalyst at a critical temperature below 800.degree. F. The normally liquid portion of the hydrocracker effluent product has a surprisingly low sulfur content of less than 0.1 weight percent, a low nitrogen content of less than 0.5 weight percent, and a high API gravity of at least -3.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: May 18, 1982
    Assignee: Chevron Research Company
    Inventors: Joel W. Rosenthal, Arthur J. Dahlberg
  • Patent number: 4326037
    Abstract: A method for enhancing the ability of polysaccharides in aqueous solution to flow through a porous medium comprises contacting the polysaccharides with an endoenzyme capable of hydrolyzing at least one of the linkages of the sugar units of the polysaccharides and maintaining the polysaccharides in contact with the enzyme under hydrolysis conditions for a time sufficient to decrease the tendency of the polysaccharides to plug the porous medium yet insufficient to decrease the viscosity of the aqueous polysaccharides by more than 25%. The partially hydrolyzed polysaccharides are useful as thickening agents for flooding water used to recover oil from oil-containing subterranean formations.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: April 20, 1982
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: William L. Griffith, Alicia L. Compere, James W. Holleman
  • Patent number: 4287165
    Abstract: High purity phosphorus and phosphorus compounds are prepared by first reacting H.sub.3 PO.sub.4 with a lead compound such as PbO to form Pb.sub.3 (PO.sub.4).sub.2. The Pb.sub.3 (PO.sub.4).sub.2 is reduced with H.sub.2 at a temperature sufficient to form gaseous phosphorus which can be recovered as a high purity phosphorus product. Phosphorus compounds can be easily prepared by reacting the phosphorus product with gaseous reactants. For example, the phosphorus product is reacted with gaseous Cl.sub.2 to form PCl.sub.5. PCl.sub.5 is reduced to PCl.sub.3 by contacting it in the gaseous phase with solid elemental phosphorus. POCl.sub.3 can be prepared by contacting PCl.sub.5 in the gaseous phase with solid P.sub.2 O.sub.5. The general process is particularly suitable for the preparation of radiophosphorus compounds.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: September 1, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Arthur F. Rupp, David V. Woo
  • Patent number: 4276063
    Abstract: Fully chlorinated and/or fluorinated hydrocarbons are used as gas scrubbing liquids for preventing noxious gas emissions to the atmosphere.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: June 30, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Walter J. Lackey, Robert S. Lowrie, John D. Sease
  • Patent number: 4265983
    Abstract: Austenitic stainless steel alloys containing delta ferrite, such as are used as weld deposits, are protected against the transformation of delta ferrite to sigma phase during aging by the presence of carbon plus nitrogen in a weight percent 0.015-0.030 times the volume percent ferrite present in the alloy. The formation of chi phase upon aging is controlled by controlling the Mo content.
    Type: Grant
    Filed: June 26, 1979
    Date of Patent: May 5, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: James M. Leitnaker
  • Patent number: 4263406
    Abstract: A continuously referenced apparatus for measuring the concentration of a reactive chemical species in solution comprises in combination conduit means for introducing a sample solution, means for introducing one or more reactants into a sample solution, a reaction zone in fluid communication with said conduit means wherein a first chemical reaction occurs between said species and reactants, and a stream separator disposed within the conduit means for separating the sample solution into a sample stream and a reference stream. An enzymatic reactor is disposed in fluid communication with only the sample stream wherein a second reaction takes place between the said reactants, species, and reactor enzymes causing the consumption or production of an indicator species in just the sample stream.
    Type: Grant
    Filed: July 31, 1979
    Date of Patent: April 21, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: William D. Bostick, Mark S. Denton, Stanley R. Dinsmore
  • Patent number: 4259108
    Abstract: A process for producing hydrogen comprises the step of reacting metallic Cu with Ba(OH).sub.2 in the presence of steam to produce hydrogen and BaCu.sub.2 O.sub.2. The BaCu.sub.2 O.sub.2 is reacted with H.sub.2 O to form Cu.sub.2 O and a Ba(OH).sub.2 product for recycle to the initial reaction step. Cu can be obtained from the Cu.sub.2 O product by several methods. In one embodiment the Cu.sub.2 O is reacted with HF solution to provide CuF.sub.2 and Cu. The CuF.sub.2 is reacted with H.sub.2 O to provide CuO and HF. CuO is decomposed to Cu.sub.2 O and O.sub.2. The HF, Cu and Cu.sub.2 O are recycled. In another embodiment the Cu.sub.2 O is reacted with aqueous H.sub.2 SO.sub.4 solution to provide CuSO.sub.4 solution and Cu. The CuSO.sub.4 is decomposed to CuO and SO.sub.3. The CuO is decomposed to form Cu.sub.2 O and O.sub.2. The SO.sub.3 is dissolved to form H.sub.2 SO.sub.4. H.sub.2 SO.sub.4, Cu and Cu.sub.2 O are recycled. In another embodiment Cu.sub.2 O is decomposed electrolytically to Cu and O.sub.2.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: March 31, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Donald M. Richardson, deceased, Carlos E. Bamberger
  • Patent number: 4257905
    Abstract: Gaseous insulators comprise compounds having high attachment cross sections for electrons having energies in the 0-1.3 electron volt range. Multi-component gaseous insulators comprise compounds and mixtures having overall high electron attachment cross sections in the 0-1.3 electron volt range and moderating gases having high cross sections for inelastic interactions with electrons of energies 1-4 electron volts. Suitable electron attachment components include hexafluorobutyne, perfluorobutene-2, perfluorocyclobutane, perfluorodimethylcyclobutane, perfluorocyclohexene, perfluoromethylcyclohexane, hexafluorobutadiene, perfluoroheptene-1 and hexafluoroazomethane. Suitable moderating gases include N.sub.2, CO, CO.sub.2 and H.sub.2. The gaseous insulating mixture can also contain SF.sub.6, perfluoropropane and perfluorobenzene.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: March 24, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Loucas G. Christophorou, David R. James, Marshall O. Pace, Robert Y. Pai
  • Patent number: 4253872
    Abstract: A novel iridium alloy containing 100-500 ppm thorium has enhanced impact properties over undoped iridium and over prior art iridium alloys.
    Type: Grant
    Filed: February 16, 1977
    Date of Patent: March 3, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Chain-Tsuan Liu, Henry Inouye, Anthony C. Schaffhauser, Calvin L. White
  • Patent number: 4238229
    Abstract: Malleable long range ordered alloys having high critical ordering temperatures exist in the V(Co,Fe).sub.3 and V(Co,Fe,Ni).sub.3 system having the composition comprising by weight 22-23% V, 35-50% Fe, 0-22% Co and 19-40% Ni with an electron density no greater than 8.00. Excellent high temperature properties occur in alloys having compositions comprising by weight 22-23% V, 35-45% Fe, 0-10% Co, 25-35% Ni; 22-23% V, 28-33% Ni and the remainder Fe; and 22-23% V, 19-22% Ni, 19-22% Co and the remainder Fe. The alloys are fabricable by casting, deforming and annealing for sufficient time to provide ordered structure.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: December 9, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Chain T Liu, Henry Inouye, Anthony C. Schaffhauser
  • Patent number: 4237105
    Abstract: A thermochemical cyclic process for producing hydrogen from water comprises reacting ceric oxide with monobasic or dibasic alkali metal phosphate to yield a solid reaction product, oxygen and water. The solid reaction product, alkali metal carbonate or bicarbonate, and water, are reacted to yield hydrogen, ceric oxide, carbon dioxide and trialkali metal phosphate. Ceric oxide is recycled. Trialkali metal phosphate, carbon dioxide and water are reacted to yield monobasic or dibasic alkali metal phosphate and alkali metal bicarbonate, which are recycled. The cylic process can be modified for producing carbon monoxide from carbon dioxide by reacting the alkali metal cerous phosphate and alkali metal carbonate or bicarbonate in the absence of water to produce carbon monoxide, ceric oxide, carbon dioxide and trialkali metal phosphate. Carbon monoxide can be converted to hydrogen by the water gas shift reaction.
    Type: Grant
    Filed: June 20, 1979
    Date of Patent: December 2, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Carlos E. Bamberger, Paul R. Robinson
  • Patent number: 4234338
    Abstract: Thermal shock resistant cermet insulators containing 0.1-20 volume % metal present as a dispersed phase. The insulators are prepared by a process comprising the steps of (a) providing a first solid phase mixture of a ceramic powder and a metal precursor; (b) heating the first solid phase mixture above the minimum decomposition temperature of the metal precursor for no longer than 30 minutes and to a temperature sufficiently above the decomposition temperature to cause the selective decomposition of the metal precursor to the metal to provide a second solid phase mixture comprising particles of ceramic having discrete metal particles adhering to their surfaces, said metal particles having a mean diameter no more than 1/2 the mean diameter of the ceramic particles, and (c) densifying the second solid phase mixture to provide a cermet insulator having 0.1-20 volume % metal present as a dispersed phase.
    Type: Grant
    Filed: December 28, 1978
    Date of Patent: November 18, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Chester S. Morgan, William R. Johnson
  • Patent number: 4234343
    Abstract: A ceramic composition suitable for use as a high-temperature structural material, particularly for use in apparatus exposed to oxidizing atmospheres at temperatures of 400 to 1600.degree. C., is found within the triangular area ABCA of the Si.sub.3 N.sub.4 --SiO.sub.2 --M.sub.2 O.sub.3 ternary diagram depicted in FIG. 1. M is selected from the group of Yb, Dy, Er, Sc, and alloys having Yb, Y, Er, or Dy as one component and Sc, Al, Cr, Ti, (Mg +Zr) or (Ni+Zr) as a second component, said alloy having an effective ionic radius less than 0.89 A.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: November 18, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Clarence A. Andersson
  • Patent number: 4231796
    Abstract: An improved method for preparing a cermet comprises preparing a compact having about 85 to 95 percent theoretical density from a mixture of metal and metal oxide powders from a system containing a eutectic composition, and inductively heating the compact in a radiofrequency field to cause the formation of an internal molten zone. The metal oxide particles in the powder mixture are effectively sized relative to the metal particles to permit direct inductive heating of the compact by radiofrequency from room temperature. Surface melting is prevented by external cooling or by effectively sizing the particles in the powder mixture.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: November 4, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Grady W. Clark, John D. Holder, Arvid E. Pasto
  • Patent number: 4230682
    Abstract: A thermochemical cyclic process for producing hydrogen employs the reaction between ceric oxide and titanium dioxide to form cerium titanate and oxygen. The titanate is treated with an alkali metal hydroxide to give hydrogen, ceric oxide, an alkali metal titanate and water. Alkali metal titanate and water are boiled to give titanium dioxide which, along with ceric oxide, is recycled.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: October 28, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Carlos E. Bamberger
  • Patent number: 4221610
    Abstract: A novel fabrication procedure prevents or eliminates the reprecipitation of segregated metal carbides such as stringers in Ti-modified Hastelloy N and stainless steels to provide a novel alloy having carbides uniformly dispersed throughout the matrix. The fabrication procedure is applicable to other alloys prone to the formation of carbide stringers. The process comprises first annealing the alloy at a temperature above the single phase temperature for sufficient time to completely dissolve carbides and then annealing the single phase alloy for an additional time to prevent the formation of carbide stringers upon subsequent aging or thermomechanical treatment.
    Type: Grant
    Filed: February 24, 1978
    Date of Patent: September 9, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: David N. Braski, James M. Leitnaker
  • Patent number: 4191628
    Abstract: Suspended mineral solids are separated from a coal-derived liquid containing the solids by a process comprising the steps of: (a) contacting said coal-derived liquid containing solids with a molten additive having a melting point of 100.degree.-500.degree. C. in an amount of up to 50 wt.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: March 4, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: William J. McDowell