Abstract: The present invention pertains to a packing structure and method of packing which can be used in the wellbore of injection wells for the recovery of heavy oils, shale oils, and tars, and in well shafts for in-situ coal gasification. The packing can also be used in the wellbore of gas and light oil production wells. The packing is used to provide passive protection of well structural components in the event of a well fire or fire in the formation near the well.The packing is placed in the well shaft below ground level, and preferably below the well packer. The packing particle size, as related to the well casings, is a critical feature of the invention. Particle size distribution, and position of placement of packing in the wellbore as a function of packing particle size, are significant variables which can be tailored to the application.
Abstract: This invention relates to heterogeneous (organic polymer-supported) calcium-containing catalysts and the use thereof in the preparation of alkoxylation products, i.e., condensation reaction products of alkylene oxides and organic compounds having at least one active hydrogen. In another aspect of this invention, processes are provided for preparing heterogeneous (organic polymer-supported) calcium-containing catalysts for alkoxylation using calcium oxide or calcium hydroxide as sources for the catalytically-active calcium. In a further aspect of this invention, alkoxylation products are provided that have beneficial, narrow molecular weight ranges and are essentially neutral in pH and free from catalyst residues.
Abstract: The invention relates to a fuel-oxidant mixture for detonation gun applications comprising an oxidant such as oxygen and a fuel mixture of two combustible gases such as acetylene and propylene. The invention also relates to articles coated in a process using this fuel-oxidant mixture.
Abstract: A feed gas stream is introduced directly into a recirculating liquid stream so as to facilitate formation and maintenance of gas bubbles in a dispersed form in a recirculating gas bubble-liquid mixture. By the maintaining of a gas-liquid interface and overhead gas phase in conjunction with a quiescent zone of liquid apart from the portion of liquid in which said mixture is maintained in a recirculating flow condition, the loss of appreciable amounts of gas to the overhead gas phase is avoided.
Type:
Grant
Filed:
May 30, 1989
Date of Patent:
February 13, 1990
Assignee:
Union Carbide Corporation
Inventors:
Lawrence M. Litz, Mark K. Weise, Mitchell Adis
Abstract: A bearing support system providing axial thrust load control of bearing supporting a rotating element, by retaining the bearings with a slotted inner ring and supporting the inner ring with a radially spaced outer ring by means of a plurality of circumferentially spaced supports which are radially stiff but axially flexible.
Abstract: A centrifugal compressor having a two section diffuser which has a tapered section having a constant diffusing area along its radial length, and a straight section having an increasing diffusing area along its radial length, and a diffusing volute having a throat area significantly larger than conventional designs.
Type:
Grant
Filed:
March 8, 1989
Date of Patent:
February 13, 1990
Assignee:
Union Carbide Corporation
Inventors:
James B. Wulf, Timothy D. Craig, Alfred P. Evans, Ross H. Sentz
Abstract: A novel family of crystalline, microporus aluminophosphate compositions is synthesized by hydrothermal crystallization at elevated temperatures of aluminophosphate gels containing a molecular structure forming template. The family comprises a number of distinct species, each with a unique crystal structure. Calcination removes volatile extraneous matter from the intracrystalline void space and yields microporus crystalline adsorbents with uniform pores, the dimensions of which vary, among the individual species, from about 3A to 10A diameter. The composition exhibit properties somewhat analogous to zeolitic molecular sieves which render them useful as catalysts or catalyst bases in chemical reactions such as hydrocarbon conversions.
Type:
Grant
Filed:
October 20, 1983
Date of Patent:
February 6, 1990
Assignee:
Union Carbide Corporation
Inventors:
Stephen T. Wilson, Brent M. Lok, Edith M. Flanigen
Abstract: A tuyere having improved wear resistance at the tip, and a refractory walled metallurgical vessel incorporating the tuyere, characterized by an oxide thermal barrier coating on the outer surface of the outermost conduit of the tuyere having a thermal conductivity less than that of the refractory.
Type:
Grant
Filed:
August 26, 1988
Date of Patent:
February 6, 1990
Assignee:
Union Carbide Corporation
Inventors:
Paul J. Schaffer, Robert C. Tucker, Jr.
Abstract: A method for intercalating graphite flakes which requires less intercalation solution and avoids a washing step, thus producing economy in material and production costs, and avoiding production of contaminated waste water which requires costly disposal steps.
Type:
Grant
Filed:
March 16, 1989
Date of Patent:
January 23, 1990
Assignee:
Union Carbide Corporation
Inventors:
Ronald A. Greinke, Robert A. Mercuri, Edgar J. Beck
Abstract: The present invention is directed to polycrystalline titanium nitride and zirconium nitride coating compositions and coated articles with a I(111)/I(200) x-ray diffraction intensity ratio of at least about 75 for the titanium nitride composition and at least about 15 for the zirconium nitride composition and to a method of forming a highly oriented polycrystalline titanium nitride or zirconium nitride coating composition with a high I(111)/I(200) x-ray diffraction intensity ratio. This invention also concerns polycrystalline titanium nitride and zirconium nitride coating compositions and coated articles of the type described with an interplanar spacing, d.sub.111, of 2.460 Angstroms or less for TiN and an interplanar spacing, d.sub.111, of 2.660 Angstroms or less for ZrN and to methods for producing same. The composition is deposited upon a substrate in an evacuated chamber from a titanium or zirconium cathode source surrounded by an elongated member which overhangs the cathode to form a cathode chamber.
Abstract: An ignition system and method for a post-mixed burner characterized by an igniter comprising a tube for igniter oxidant flow and having an electrode therein, said tube positioned within the fuel passage but recessed from the discharge end of the fuel passage and from the combustion zone.
Type:
Grant
Filed:
December 8, 1988
Date of Patent:
January 9, 1990
Assignee:
Union Carbide Corporation
Inventors:
Dennis R. Farrenkopf, William J. Snyder
Abstract: Gas samples withdrawn from within a reactor vessel, as well as from the feed gas thereto, are passed to gas analyzers for particular components or impurities desired to be measured. The response time of the reactor analysis system employed is advantageously minimized by the elimination of dead gas space upon the closing of control valves and the provisions for rapid purging of the system or of individual gas analyzer feed lines.
Type:
Grant
Filed:
May 9, 1988
Date of Patent:
January 2, 1990
Assignee:
Union Carbide Corporation
Inventors:
Raymond P. Roberge, Arthur W. Francis, Jr., Thomas G. Wolfe
Abstract: An anisotropic carbonaceous body is produced by plastically deforming a pitch-based semicoke at elevated temperature to align the internal structure. The semicoke may be carbonized and graphitized while retaining its anisotropic properties.
Abstract: A method of redistributing a mixture of organohalosianes, particularly methylchlorosilanes by contacting said mixture with a heat treated crystalline gamma alumina or eta alumina catalyst.
Type:
Grant
Filed:
December 22, 1983
Date of Patent:
December 26, 1989
Assignee:
Union Carbide Corporation and Plastics Company Inc.
Abstract: A method for pressurizing an aqueous liquid and delivering the liquid into a serving vessel while undergoing a pressure reduction wherein a large but not excessive head is formed on the liquid in the vessel by use of pressurizing gas consisting essentially of from 32 to 70 volume percent carbon dioxide and the balance being one or more gases having a solubility in water less than carbon dioxide.
Abstract: A method of stripping coatings from aluminum base materials using an electrolytic solution comprising a hydroxy organic acid such as tartaric acid; an alkali metal carbonate such as sodium carbonate; an aluminum corrosion inhibitor such as sodium silicate; and remainder water.
Abstract: Transition metal-bis-phosphite catalyzed carbonylation processes, especially hydroformylation, as well as transition metal-bis-phosphite compositions, bis-phosphite ligands and transition metal-bis-phosphite catalysts.
Type:
Grant
Filed:
March 31, 1988
Date of Patent:
December 5, 1989
Assignee:
Union Carbide Corporation
Inventors:
Ernst Billig, Anthony G. Abatjoglou, David R. Bryant
Abstract: A rotary gas seal in which a first member, e.g., a tip, cooperates with a second member to inhibit gas flow therebetween, the improvement wherein, the tip is provided with a ceramic or metallic coating bonded thereto, the surface of the coating having a plurality of laser-formed depressions and providing a wear-resistant, cutting surface capable of cutting into the second member. Also, a turbine or compressor blade having a tip surface adapted to cooperate with a sealing surface to form a seal between the blade and the sealing surface and a ceramic or metallic carbide coating bonded to said tip surface, the coating having a plurality of laser-formed depressions and providing a wear-resistant, cutting surface capable of cutting into the sealing surface.
Abstract: The invention relates to a vessel for evaporating molten metal, such as aluminum, in which the vessel comprises boron nitride with or without a compatible refractory material and said vessel having on at least a portion of its surface a coating of titanium-iron-silicon which can easily and effectively be wetted by the molten metal.
Abstract: A process for producing and refining trisubstituted glycol monoesters, e.g., 2,2,4-trimethyl-1,3-pentanediol monoester. The improvement resides in immediately distilling the crude condensation product mixture as it leaves the reactor before it has cooled or had any contact with added water.
Type:
Grant
Filed:
November 25, 1987
Date of Patent:
November 28, 1989
Assignee:
Union Carbide Corporation
Inventors:
John N. Argyropoulos, Edmond J. Derderian, Brian T. Keen, Timothy G. Bumgardner