Patents Examined by G. O. Peters
  • Patent number: 4333860
    Abstract: A chromium salt such as ammonium chromate or ammonium dichromate, which is normally insoluble in nonaqueous solvents which do not easily rehydrate the silica surface is solubilized, for instance by treating it with a crown ether, and impregnated onto a particulate support from a nonaqueous solvent which does not easily rehydrate the silica. The resulting composition is then activated in an oxygen ambient such as air in a conventional manner and then utilized as a catalyst for polymerization reactions such as the production of polyolefins.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: June 8, 1982
    Assignee: Phillips Petroleum Company
    Inventors: Gil R. Hawley, Max P. McDaniel
  • Patent number: 4331639
    Abstract: Gas streams containing SO.sub.x and/or NO.sub.x compounds are treated in an absorption-regeneration process for removal of the SO.sub.x and/or NO.sub.x compounds. The process in one embodiment removes SO.sub.x compounds from a stack gas or other feed gas stream by (1) absorbing the SO.sub.x into a novel aqueous liquid absorbent comprising formic acid and an alkanolamine containing a tertiary amine functional group and (2) regenerating the absorbent when spent by subjecting the spent absorbent to an elevated temperature above that utilized for absorption of said SO.sub.x, said elevated temperature being sufficient to convert a substantial proportion of the dissolved SO.sub.x to elemental sulfur and/or H.sub.2 S. If NO.sub.x compounds are present in the stack gas stream, they may also be removed, NO.sub.2 being removed without modification of the process for removing SO.sub.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: May 25, 1982
    Assignee: Union Oil Company of California
    Inventors: Robert H. Hass, Walter Albertson
  • Patent number: 4330111
    Abstract: Multi-purpose in-line direct heat treating equipment for hot-rolled steel wire rod has, in combination, a front stage transport conveyor portion and a holding furnace both positioned on a front traveling skid carriage, a quenching tank and a holding tank both positioned on a rear traveling skid carriage, each of the traveling skid carriages being able to travel in direction transverse to the direction of conveying of the hot-rolled steel wire rod emerging from a hot rolling mill for the purpose of direct heat treating the wire rod by taking advantage of the heat retained in the wire rod.
    Type: Grant
    Filed: October 1, 1980
    Date of Patent: May 18, 1982
    Assignee: Nippon Steel Corporation
    Inventors: Kyoichiro Matsuoka, Nobuyasu Irie, Satoshi Inoue, Katsuto Ito, Isao Yata
  • Patent number: 4330520
    Abstract: The process and apparatus described seeks to prevent NO.sub.x emissions after an emergency shutdown in a process for manufacturing nitric acid by catalytic combustion of ammonia, compression of the nitrous combustion gases and subsequent absorption. Immediately on shutdown the intake nitrous gas supply to the compressor is interrupted, the residual intake side nitrous gases are conveyed to the delivery side, the delivery side gas volume is shut off, the gas on the delivery side is expanded to the intake side and then exhausted into a vacuum system. Subsequently the acid charged with NO.sub.x in the absorption stages is drawn off, degassed acid is circulated through the absorption stages until equilibrium is established, the pressure of the shutoff section is released and cooled acid is admitted to the absorption stages.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: May 18, 1982
    Assignee: Davy McKee Aktiengesellschaft
    Inventor: Gunter Roller
  • Patent number: 4330509
    Abstract: Zirconium is selectively precipitated from aqueous solutions containing zirconium and uranium by treatment with a precipitant consisting of tartaric acid or a tartrate.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: May 18, 1982
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventor: Helen G. Henry
  • Patent number: 4328959
    Abstract: An apparatus and method for removing used refractory lining or slag or both from the inner wall of an elongated vessel. The apparatus includes a cutting disc movably mounted on a guide mechanism which may be fixably located within the vessel. In accordance with the inventive technique, one or more recesses is formed within the lining extending from the surface thereof to the wall of the vessel.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: May 11, 1982
    Inventor: Gerwin Holtmann
  • Patent number: 4328194
    Abstract: A process for the selective reduction of nitrogen oxide in a combustion effluent gas stream is disclosed wherein the gas stream is contacted with sulfur at a temperature of about C. to C., therein converting the NO to N.sub.2 and the sulfur to SO.sub.2.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: May 4, 1982
    Assignee: Shell Oil Company
    Inventor: Norm C. Samish
  • Patent number: 4328201
    Abstract: A process for removing sulfur dioxide from an off-gas and converting it to elemental sulfur wherein steam is introduced into a sulfur dioxide-containing off-gas, and the composite is passed through a reactor containing a mixture of fresh and recycled coal.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: May 4, 1982
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Peter Steiner, Carl Gutterman, Stuart M. Dalton
  • Patent number: 4327062
    Abstract: The chlorides of elements of Groups III, IV and V of the Periodic Table, such as, boron trichloride, silicon tetrachloride, zirconium tetrachloride and vanadium tetrachloride are prepared by heating activated carbon particles having a supported aqueous solution of compounds of the elements of Groups III, IV and V of the Periodic Table thereon at a temperature of from through C. and, then, reacting the resultant activated carbon particles with chlorine.
    Type: Grant
    Filed: February 4, 1981
    Date of Patent: April 27, 1982
    Assignee: UBE Industries, Ltd.
    Inventors: Tadashi Iwai, Hisayuki Mizuno, Masao Miura
  • Patent number: 4327070
    Abstract: A method for making water-soluble potassium formate substantially free of water-insoluble salts selectively and in high yield at temperatures at or below about C., includes contacting potassium sulfate, potassium carbonate or a mixture of potassium and sodium carbonate and potassium and sodium sulfate with calcium formate, forming water-soluble potassium formate and water-insoluble calcium sulfate, calcium carbonate, or mixtures thereof, thus permitting recovery of substantially potassium-free calcium sulfate, calcium carbonate or both, and substantially calcium sulfate-free calcium carbonate-free potassium formate from the aqueous media.
    Type: Grant
    Filed: August 8, 1980
    Date of Patent: April 27, 1982
    Assignee: TRW Inc.
    Inventor: Robert A. Meyers
  • Patent number: 4325932
    Abstract: Nitrous oxide can be produced by reacting nitric oxide and carbon monoxide in the presence of a catalyst in an anhydrous system. The preferred catalyst is a mixture of PdCl.sub.2, CuCl.sub.2 and LiCl, which is dissolved in anhydrous methanol.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: April 20, 1982
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Charles M. Bartish, Donald F. Tucker
  • Patent number: 4325925
    Abstract: A method for removing nitric oxide from gas streams containing same. The nitric acid is removed by contacting the nitric oxide with elemental iron in the presence of water. The nitric oxide is believed to be reduced to nitrogen gas. The method has particular applications to removal of nitric oxide from gas streams produced during combustion of carbonaceous materials.
    Type: Grant
    Filed: June 6, 1980
    Date of Patent: April 20, 1982
    Assignee: Tosco Corporation
    Inventors: Frank C. Haas, Gerald B. Faudel
  • Patent number: 4325936
    Abstract: A hydrogen sulfide removal and conversion method in which a hydrogen sulfide-containing gas stream is contacted with a regenerable washing solution containing solubilized vanadium thiocyanate ions, a carboxylate complexing agent and one or more water-soluble quinones capable of solubilizing tetravalent vanadium. The molar ratio of vanadium to quinone(s) in the washing solution is selected to substantially reduce or eliminate the formation of contaminant sulfate salts. The absorbed hydrogen sulfide is converted to elemental sulfur which, after oxidative regeneration of the washing solution, is separated from the regenerated solution.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: April 20, 1982
    Assignee: Union Oil Company of California
    Inventors: Hugh W. Gowdy, Donald M. Fenton
  • Patent number: 4325924
    Abstract: Method of reducing NO.sub.x in fuel rich combustion effluents is provided comprising introducing urea at temperatures in excess of about F. in the presence of excess fuel, wherein said urea is introduced either as a solid or solution in amounts sufficient to reduce the NO.sub.x concentration.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: April 20, 1982
    Assignee: Electric Power Research Institute, Inc.
    Inventors: John K. Arand, Lawrence J. Muzio, Donald P. Teixeira
  • Patent number: 4324391
    Abstract: A pre-heating assembly to be used for pre-heating ingots being transported to a melting furnace, which includes an inner cylinder constituting a main passage for exhaust gas discharged from a flue of the melting furnace, an outer cylinder which is positioned around the inner cylinder to leave a subsidiary passage for the exhaust gas between the two cylinders, an ingot supplying passage spirally provided along the outermost circumference of the inner cylinder, in which the ingots, each having a spherical configuration like a ball, roll down the passage in succession so that each ingot is pre-heated prior to its introduction into the melting furnace, and a connector support member, on which both cylinders are mounted and the bottom portion of the connector support member is coupled to the outlet of the flue.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: April 13, 1982
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Terumoto Yamaguchi, Masaya Ohta
  • Patent number: 4324586
    Abstract: A tellurium component is separated from a tellurium-antimony-containing metal oxide catalyst by heating the catalyst at a temperature of about C. to about 1, C. in a non-reducing atmosphere.
    Type: Grant
    Filed: September 25, 1980
    Date of Patent: April 13, 1982
    Assignee: Nitto Chemical Industry Co., Ltd.
    Inventors: Yutaka Sasaki, Kiyoshi Moriya
  • Patent number: 4324771
    Abstract: Boron and calcium are removed from brines with use of a mixture of from about 0.8 to 15 volume percent of an .alpha.-hydroxy oxime extractant having the general formula: ##STR1## where R and R' are hydrocarbon radicals and R" is hydrogen or a hydrocarbon radical, from 0 to 10 volume percent of a 7 to 12 carbon alcohol, balance diluent.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: April 13, 1982
    Assignee: Amax Inc.
    Inventors: Ernest W. Barlow, Ramaswami Neelameggham
  • Patent number: 4324701
    Abstract: A rectangular-solid packaged catalyst assembly made up of a plurality of rectangular-solid unit catalysts stacked and assembled together, the unit catalysts having a honeycomb structure with a multiplicity of gas passages each. Heat-resistant packings are used to cover at least the vertices and the neighboring areas of the faces of the unit catalysts other than the gas-passage faces and also to cover the edges of the gas-passage faces surrounding the gas passages, the packings being integrally secured to the unit catalysts and packaged together in a rectangular-solid housing. Retaining strips are placed over the packings on the edges of the gas-passage faces on at least either the gas inlet or outlet ends of the unit catalysts and are securely attached to the housing.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: April 13, 1982
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Mitsuyasu Honda, Yoshihiro Shiraishi, Toru Seto
  • Patent number: 4323544
    Abstract: Novel sorbents comprising (a) an alumina component comprising alumina of the surface area of at least 20 and preferably 100 square meters per gram, and (b) a salt, or mixtures of salts, of an alkali or alkaline earth metal, especially oxides, hydroxides, carbonates, nitrates, acetates or aluminates of sodium and potassium, are outstandingly effective for the removal of nitrogen oxides and sulfur oxides from waste gas streams.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: April 6, 1982
    Assignee: Noxso Corporation
    Inventor: Jules Magder
  • Patent number: 4322395
    Abstract: A process for fabricating aluminum nitride needles, the process utilizing moderate furnace temperatures ( C.) and low toxicity reactants (i.e. NH.sub.3 and Al). Argon gas and ammonia gas are mixed and flowed over the heated aluminum and the aluminum nitride needles grow at the upstream end of the hot zone of the furnace.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: March 30, 1982
    Assignee: Honeywell Inc.
    Inventors: Kelly D. McHenry, Jane M. Smeby, Robert H. Michelson