Group Iva Metal (ge, Sn, Or Pb) Patents (Class 423/618)
-
Patent number: 5134102Abstract: Production of composite ceramic articles by infiltration of a particulate, permeable bed or permeable preform with a polycrystalline matrix produced as a metal-oxidant reaction product, wherein the bed or preform is comprised of dross.Type: GrantFiled: November 26, 1990Date of Patent: July 28, 1992Assignee: Lanxide Technology Company, LPInventors: S. K. Nadkarni, Narasimha S. Raghavan
-
Patent number: 5108732Abstract: A process for preparing finely-divided oxides of metals of metalloids of the elements of main groups III and IV and sub-groups III, IV, V and VI of the Periodic System of Elements, comprising reacting compounds of these elements with a polymerizable hydrocarbon compound or mixture to form a polymer product, which is then thermally treated to yield the oxide product.Type: GrantFiled: October 25, 1990Date of Patent: April 28, 1992Assignee: Bayer AktiengesellschaftInventors: Wolgang Krumbe, Benno Laubach
-
Patent number: 5089248Abstract: Metal oxides prepared by exchange reactions between organosemiconductor oxides (such as disiloxanes) and metal coordination compounds (such as neutral metal complexes, metal chelates and chlorometalates), metallic halides (such as zinc chloride), or organometallic compounds (such as methylithium) in inert environments and anhydrous solvents.Type: GrantFiled: May 14, 1990Date of Patent: February 18, 1992Inventor: Masud Akhtar
-
Patent number: 5061682Abstract: Ceramic precursor mixtures containing a metal cation, a carbohydrate, and an anion capable of participating in an anionic oxidation-reduction reaction with the carbohydrate for continuous or batchwise drying and pyrolyzing to provide ceramic powders.Type: GrantFiled: January 17, 1990Date of Patent: October 29, 1991Assignee: The Washington Technology CenterInventors: Ilhan A. Aksay, Chan Han, Gary D. Maupin, Corrie B. Martin, Randal P. Kurosky, Gregory C. Stangle
-
Patent number: 5057486Abstract: A particulate mixture comprised of Bi.sub.2 CaSr.sub.2 Cu.sub.2 O.sub.8.+-.x where x ranges from 0 to 0.5, Ca.sub.2 CuO.sub.3, cupric oxide and lead oxide, wherein the Bi.sub.2 CaSr.sub.2 Cu.sub.2 O.sub.8.+-.x crystals are oriented with their c-axis at least sufficiently parallel to each other so as not to differ significantly from a common direction, is initially reacted producing an intermediate swollen partially reacted product which is pressed to remove the swelling and then sintered to produce a superconductive Bi.sub.2 yPb.sub.y Ca.sub.2 Sr.sub.2 Cu.sub.3 O.sub.10.+-.z body where y ranges from 0.1 to 0.5 and z ranges from zero to less than 1.Type: GrantFiled: March 5, 1990Date of Patent: October 15, 1991Assignee: General Electric CompanyInventors: Ronald H. Arendt, Mary F. Garbauskas
-
Patent number: 5057488Abstract: A reactant particulate mixture comprised of Bi.sub.2 CaSr.sub.2 Cu.sub.2 O.sub.8.+-.x where x ranges from 0 to 0.5, Ca.sub.2 CuO.sub.3, cupric oxide and lead oxide is formulated and reacted to produce superconductive Bi.sub.2-y Pb.sub.y Ca.sub.2 Sr.sub.2 Cu.sub.3 O.sub.10.+-.z where y ranges from 0.1 to 0.5 and z ranges from zero to less than 1.Type: GrantFiled: February 12, 1990Date of Patent: October 15, 1991Assignee: General Electric CompanyInventors: Ronald H. Arendt, Mary F. Garbauskas
-
Patent number: 5049541Abstract: Superconductors of the Bi-Pb-Sr-Ca-Cu-O system and Tl-Pb-Ba-Ca-Cu-O system having a high Tc phase (about 110K and about 125K, respectively, or more) at a high proportion are obtained by adding a calcium compound which forms CaO and a liquid phase at a temperature for firing the superconductors, e.g., Ca.sub.2 PbO.sub.x (x=3 or 4); or by starting form a composition represented by the formula: Bi.sub.2 Pb.sub.(n-1)/2 Sr.sub.2 Ca.sub.n Cu.sub.n+1 O.sub.b, or Tl.sub.2 Pb.sub.(n-1)/2 Ba.sub.2 Ca.sub.n Cu.sub.n+1 Ob where 2.ltoreq.n.ltoreq.10, 5.ltoreq.b.ltoreq.40.5, i.e., at a ratio of Ca:Pb=2:1.Type: GrantFiled: July 19, 1989Date of Patent: September 17, 1991Assignee: Fujitsu LimitedInventors: Takuya Uzumaki, Kazunori Yamanaka, Nobuo Kamehara, Koichi Niwa
-
Patent number: 5049371Abstract: A novel process is described for the preparation of monodisperse ceramic ders wherein particulate oxides or hydroxides are obtained by reaction of hydrolysable compounds with water. The reaction is carried out in the presence of a complexing agent and, optionally, a stabilizer.Type: GrantFiled: October 28, 1988Date of Patent: September 17, 1991Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung e.V.Inventors: Gunter Rinn, Rudiger Nass
-
Patent number: 5019553Abstract: A metal oxide material is provided which is represented by the composition formula:A.sub.2 B.sub.x Cu.sub.y O.sub.zwherein 2.ltoreq.x.ltoreq.3.5, 2.ltoreq.y.ltoreq.3.5, x+y>4, and 4<z; A is an element or a group of elements selected from alkaline earth metal elements; and B is an element or a group of elements selected from the group of elements consisting of bismuth, lead and thallium. The material has a superconductivity transition temperature of from 4.2K to 12K.Type: GrantFiled: December 13, 1988Date of Patent: May 28, 1991Assignee: Canon Kabushiki KaishaInventors: Jun Akimitsu, Tohru Den
-
Patent number: 5017554Abstract: Compositions having the nominal formulaTl.sub.e Pb.sub.a Ca.sub.b Sr.sub.c Cu.sub.d O.sub.xwherein a is from about 1/10 to 3/2,b is from about 1 to 4,c is from about 1 to 3d is from about 1 to 5e is from about 3/10 to 1x=(a+b+c+d+e+y) where y is from about 1/2 to 3,are superconducting. Processes for manufacturing such compositions and for using them are disclosed.Type: GrantFiled: August 15, 1989Date of Patent: May 21, 1991Assignee: E. I. Du Pont de Nemours and CompanyInventor: Munirpallam A. Subramanian
-
Patent number: 5011822Abstract: A method for producing uniform mixed metal oxides, such as superconducting mixtures including Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-x, in which such metals are precipitated as their oxalates from alcoholic solutions of the metals as the salts of a carboxylic acid.Type: GrantFiled: January 10, 1989Date of Patent: April 30, 1991Assignee: Allied-Signal Inc.Inventor: Timothy J. Barder
-
Patent number: 4985382Abstract: The invention relates to ceramic composite articles formed by infiltration of a particulate, permeable bed or permeable preform with a polycrystalline matrix a metal-oxidant reaction product. The bed or preform includes a dross material.Type: GrantFiled: October 31, 1989Date of Patent: January 15, 1991Assignee: Lanxide Technology Company, LPInventors: S. K. Nadkarni, Narasimha S. Raghavan
-
Patent number: 4937148Abstract: Transparent conductive coatings excellent in transparency are provided on substrates such as glass, plastics, etc. by the use of conductive coating materials obtained by maintaining aqueous solutions of hydrolyzable tin containing or indium containing compounds at pH of 8-12, and gradually hydrolyzing said compounds in the solutions to form sols containing colloidal particles, followed by drying and calcining.Type: GrantFiled: May 1, 1989Date of Patent: June 26, 1990Assignee: Catalysts & Chemicals Industries Co., Ltd.Inventors: Goro Sato, Michio Komatsu, Tsuguo Koyanagi, Masayuki Matsuda, Hiroo Yoshidome, Akira Nakashima, Kazuaki Inoue
-
Patent number: 4933161Abstract: This invention relates to novel zeolitic compositions having tin substituted into the framework positions and a method for their preparation. The process of preparation more specifically involves hydrothermally treating aluminosilicate silica zeolite in the presence of tin compounds.Type: GrantFiled: January 31, 1989Date of Patent: June 12, 1990Assignee: Exxon Research and Engineering CompanyInventors: David E. W. Vaughan, Stephen B. Rice
-
Patent number: 4913890Abstract: Finely divided acicular and pore-free .alpha.-Fe.sub.2 O.sub.3 is prepared from an iron(III) salt in the presence of one or more organic substances which form complexes with iron(III) ions, in alkaline supension at from 80.degree. to 250.degree. C., and is used for the preparation of magnetic materials suitable for magnetic recording media.Type: GrantFiled: February 24, 1989Date of Patent: April 3, 1990Assignee: BASF AktiengesellschaftInventors: Volker Arndt, Helmut Auweter, Rainer Feser, Ekkehard Schwab
-
Patent number: 4910177Abstract: Disclosed is a process of reduction of aldehydes or ketones by means of reaction with alcohols, in the presence of a catalyst, to produce alcohols which correspond to said respective aldehyde or ketone. A solid of partially dehydrated one or more metal hydroxides whose metal is selected from the group consists of titanium, tin, ion, aluminum, cerium, and niobium is used as the catalyst. This process can be conducted either in a gas phase or in a liquid phase.Type: GrantFiled: April 22, 1988Date of Patent: March 20, 1990Assignee: Japan Tobacco Inc.Inventors: Hajime Matsushita, Kyoko Takahashi, Makoto Shibagaki
-
Patent number: 4910006Abstract: A crystalline zeolite SSZ-26 is prepared using a hexamethyl [4.3.3.0] propellane-8,11-diammonium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-26.Type: GrantFiled: March 23, 1988Date of Patent: March 20, 1990Assignee: Chevron Research CompanyInventors: Stacey I. Zones, Donald S. Santilli, James N. Ziemer, Dennis L. Holtermann, Theresa A. Pecoraro, Robert A. Innes
-
Patent number: 4894361Abstract: Compositions having the nominal formulaTl.sub.e Pb.sub.a Ca.sub.b Sr.sub.c Cu.sub.d O.sub.xwhereina is from about 1/10 to 3/2,b is from about 1 to 4,c is from about 1 to 3d is from about 1 to 5e is from about 3/10 to 1x=(a+b+c+d+e+y)wherey is from about 1/2 to 3,are superconducting. Processes for manufacturing such compositions and for using them are disclosed.Type: GrantFiled: August 24, 1988Date of Patent: January 16, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventor: Munirpallam A. Subramanian
-
Patent number: 4891197Abstract: A method for synthesizing a crystalline silicophosphoaluminate is provided. The composition has ion-exchange properties and is readily convertible to catalytically active material. The synthesis method requires an organic phase, and an aqueous phase. The silicon, phosphorus and aluminum components of the silicophosphoaluminate may, optionally, be replaced with other elements in the plus 4, 5 and 3 valence states, respectively.Type: GrantFiled: June 26, 1986Date of Patent: January 2, 1990Assignee: Mobil Oil CorporationInventors: Eric G. Derouane, Roland von Ballmoos
-
Patent number: 4886648Abstract: Process for the recovery of germanium from solutions that contain it, in particular from solutions diluted by the addition of tartaric acid and extraction with an organic solution of a tertiary amine. In the reextraction with sodium hydroxide there is obtained a concentrate of germanium.Type: GrantFiled: June 29, 1988Date of Patent: December 12, 1989Assignee: Asturiana De Zinc, S.A.Inventors: Francisco J. S. Menendez, Fernando M. S. Menendez, Antonio De La Cuadra Herrera, Francisco A. Tamargo, Luis P. Lorenzo, Matias R. Valcarcel, Vicente A. Fernandez
-
Patent number: 4882133Abstract: A method for producing flaky materials useful for improving, for example, a spreadability and luster of cosmetics and paints or improving mechanical characteristics of plastics, which comprises coating the liquid sol of metallic compounds onto a smooth surface to form a coated film; solidifying the said film into gel by means of heating, pH control, hydrolysis or vaporization-removal of a part of the dispersion medium; shrinking the volume of the said film by further vaporization-removal of the dispersion medium from the film; and then scraping off the flaky material from the smooth surface.Type: GrantFiled: January 26, 1989Date of Patent: November 21, 1989Assignee: Sumitomo Chemical Company, LimitedInventor: Kunio Saegusa
-
Patent number: 4880771Abstract: Novel superconductive Pb-substituted oxides are disclosed. The oxides all have layered perovskite-like crystal structure, and manifest superconductivity (R=o) above about 77K. The materials are described by the nominal formula X.sub.2+x M.sub.3-x Cu.sub.2 O.sub.8.+-..delta., where X is Bi and Pb, M is Sr and Ca, 0.ltoreq..times..ltoreq.0.3, 0.ltoreq..delta..ltoreq.0.5, the Pb/Bi ratio is between about 0.2 and about 0.5, and the Sr/Ca ratio is between 0.5 and 2.Type: GrantFiled: February 26, 1988Date of Patent: November 14, 1989Assignee: American Telephone and Telegraph Company, AT&T Bell LaboratoriesInventors: Robert J. Cava, Steven A. Sunshine
-
Patent number: 4873067Abstract: This invention relates to a synthetic porous zeolite, identified as ZSM-57, a method for its preparation. This crystalline material may have a ratio of XO.sub.2 :Y.sub.2 O.sub.3 of at least 4, wherein X represents silicon and/or germanium and Y represents aluminum, boron, chromium, iron and/or gallium. The silica/alumina form of this crystalline material has a silica to alumina ratio of at least 4 and may be prepared with directing agents which are N,N,N,N',N',N'-hexaethylpentane-diammonium compounds. The crystalline material exhibits a characteristic X-ray diffraction pattern.Type: GrantFiled: November 17, 1987Date of Patent: October 10, 1989Assignee: Mobil Oil CorporationInventors: Ernest W. Valyocsik, Nancy M. Page, Cynthia T-W. Chu
-
Patent number: 4869735Abstract: Here is provided an adsorbent for adsorbing and removing an arsenic compound which becomes a catalyst poison in a selective contact reduction process for removing nitrogen oxides (NOx) from a combustion exhaust gas by the use of an ammonia as a reducing agent and a denitrating catalyst.The adsorbent of the present invention comprises a material in which the total volume of pores is 0.2 to 0.7 cc/g and the volume of the pores having a pore diameter of 300 .ANG. or more is 10% or more with respect to the total pore volume, and the material is a specific element, its oxide, an ion-exchanged zeolite or the like.In addition, the present invention is directed to a method for removing the arsenic compound from the combustion exhaust gas by injecting the adsorbent into the flow of the gas on the upstream side of the denitrating catalyst.Type: GrantFiled: April 28, 1988Date of Patent: September 26, 1989Assignees: Mitsubishi Jukogyo K.K., Chemical Ind. Sakai, Mitsubishi Petrochemical Co., Ltd., Petrochemical Engineering Co., Ltd. Mitsubishi, Catalysts & Chemical Co., Ltd.Inventors: Masaki Miyazawa, Norihisa Kobayashi, Hiromu Takatsuka, Atsushi Morii, Toshio Koyanagi, Touru Seto, Kozo Iida, Shigeaki Mitsuoka, Hiroaki Rikimaru, Makoto Imanari, Takeo Koshikawa, Akihiro Yamauchi, Masayuki Hanada, Morio Fukuda, Kiyoshi Nagano
-
Patent number: 4861572Abstract: An improved process for the manufacture of a metal oxide is disclosed. In the process wherein a hydrolyzable organometallic compound is hydrolyzed by an alkaline hydrolyzing agent in an alkaline organic solvent, and thereafter, the metal oxide is formed by a condensation reaction of a metal hydroxide resulting from the hydrolysis of the organometallic compound, the improvement comprises feeding the organometallic compound and the hydrolyzing agent into the organic solvent so that a concentration of the hydrolyzed compound is initially above a critical level of supersaturation, and thereafter, is maintained in a range from above an upper limit of solubility to the critical level of super-saturation. According to the above process, the metal oxide can be obtained in the form of a powder material with a uniform particle size distribution.Type: GrantFiled: December 24, 1987Date of Patent: August 29, 1989Assignee: Kabushiki Kaisya AdvanceInventors: Yoshihisa Sugoh, Yasuo Ochi
-
Patent number: 4859442Abstract: A crystalline zeolite SSZ-23 is prepared using an adamantane quaternary ammonium ion as a template.Type: GrantFiled: February 17, 1987Date of Patent: August 22, 1989Assignee: Chevron Research CompanyInventors: Stacey I. Zones, R. A. Innes
-
Patent number: 4853207Abstract: Process for the manufacture of vitreous metal oxides in which a metal alcoholate derived from an alcohol, the pka of which is less than 15.74, is hydrolysed with an aqueous medium, the pH of which is greater than 1.5. The process is applied especially to the manufacture of vitreous zirconium oxide.Type: GrantFiled: February 19, 1987Date of Patent: August 1, 1989Assignee: Solvay & Cie (Societe)Inventors: Henri Wautier, Franz Legrand, Luc Lerot
-
Patent number: 4851375Abstract: A method of making self-supporting ceramic composite structures having filler embedded therein includes infiltrating a permeable mass of filler with polycrystalline material comprising an oxidation reaction product obtained by oxidation of a parent metal such as aluminum and optionally containing therein non-oxidized constituents of the parent metal. The structure is formed by placing a parent metal adjacent to a permeable filler and heating the assembly to melt the parent metal and provide a molten body of parent metal which is contacted with a suitable vapor-phase oxidant. Within a certain temperature region and optionally aided by one or more dopants in or on the parent metal, molten parent metal will migrate through previously formed oxidation reaction product into contact with the oxidant, causing the oxidation reaction product to grow so as to embed the adjacent filler and provide the composite structure.Type: GrantFiled: January 17, 1986Date of Patent: July 25, 1989Assignee: Lanxide Technology Company, LPInventors: Marc S. Newkirk, Andrew W. Urquhart, Harry R. Zwicker, H. Daniel Lesher
-
Patent number: 4842832Abstract: Ultra-fine spherical particles of a metal oxide having an average particle diameter of 40 nm or smaller can be prepared by a method in which a vaporizable metal compound is vaporized and decomposed under heating to give ultra-fine particles of a metal oxide followed by immediate cooling down to a temperature at which coalescence of the fine particles are prevented from coalescence. The fine particles have characteristics such as an excellent power of ultraviolet scattering.Type: GrantFiled: March 21, 1988Date of Patent: June 27, 1989Assignee: Idemitsu Kosan Company LimitedInventors: Hakuai Inoue, Hiroshi Komiyama
-
Patent number: 4836996Abstract: Zeolite EU-2 having a molar composition expressed by the formula:0.5 to 1.5 R.sub.2 O: Y.sub.2 O.sub.3 : at least 70 XO.sub.2 : 0 to 100 H.sub.2 Owherein R is a monovalent cation or 1/n of a cation of valency n, X is silicon and/or germanium, Y is one or more of aluminium, iron, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having an X-ray pattern substantially as set out in Table 1 is prepared from a reaction mixture containing XO.sub.2 (preferably silica), Y.sub.2 O.sub.3 (preferably alumina) and a dicationic alkylated polymethylene diamine. The zeolite is useful in catalytic processes, especially for the conversion of methanol to hydrocarbons.Type: GrantFiled: November 13, 1987Date of Patent: June 6, 1989Assignee: Imperial Chemical Industries PLCInventors: John L. Casci, Barrie M. Lowe, Thomas V. Lowe
-
Patent number: 4834958Abstract: A crystalline zeolite SSZ-24 is prepared using an adamantane quaternary ion as a template.Type: GrantFiled: February 17, 1987Date of Patent: May 30, 1989Assignee: Chevron Research CompanyInventor: Stacey I. Zones
-
Patent number: 4826671Abstract: Finely divided, acicular and pore-free .alpha.-Fe.sub.2 O.sub.3 is prepared from iron(III) salts in the presence of one or more organic substances which form complexes with iron(III) ions, in alkaline suspension, at from 80.degree. to 250.degree. C.Type: GrantFiled: March 11, 1987Date of Patent: May 2, 1989Assignee: BASF AktiengesellschaftInventors: Volker Arndt, Rainer Feser, Werner Steck, Helmut Jakusch
-
Patent number: 4778666Abstract: A crystallization process employing microwave energy is described. The process is especially useful in the manufacture of porous crystalline materials.Type: GrantFiled: December 4, 1986Date of Patent: October 18, 1988Assignee: Mobil Oil CorporationInventors: Pochen Chu, Francis G. Dwyer, James C. Vartuli
-
Patent number: 4775412Abstract: An aqueous sol of a crystalline tin oxide solid solution containing antimony and having a particle size not larger than 300.ANG. is prepared by adding an alkali metal bicarbonate or ammonium bicarbonate to an acidic aqueous solution containing a compound of tin and a compound of antimony to form a gel; purifying the gel; adding aqueous ammonia to the purified gel to form a slurry; and heating the slurry until a sol is formed.Type: GrantFiled: March 9, 1987Date of Patent: October 4, 1988Assignee: Taki Chemical Co., Ltd.Inventors: Hiroshi Nishikura, Shin Yamamoto, Yukio Terao
-
Patent number: 4725331Abstract: A process for producing tin oxide fibers, which comprises forming a melt comprising a solute composed essentially of tin oxide and a solvent selected from the group consisting of copper, a copper alloy, tin or a tin alloy, evaporating the solute from the melt, and introducing the evaporated solute to a low temperature zone, whereby tin oxide fibers are permitted to precipitate and grow in the low temperature zone.Type: GrantFiled: July 14, 1986Date of Patent: February 16, 1988Assignee: National Institute for Researches in Inorganic MaterialsInventors: Kenji Uchida, Eisuke Bannai
-
Patent number: 4721610Abstract: Very small and uniform metal oxide particles are produced by a process including the steps of ejecting a metal vapor-containing gas into a metal-oxidizing region through a nozzle and ejecting a molecular oxygen-containing gas into the metal-oxidizing region through another nozzle in such a manner that the streams of the metal vapor-containing gas and the molecular oxygen-containing gas are smashed into each other to produce a turbulent flow diffusing flame in which the metal vapor is oxidized into very small and uniform metal oxide particles.Type: GrantFiled: November 18, 1985Date of Patent: January 26, 1988Assignee: UBE Industries, Ltd.Inventors: Kozaburo Yoshida, Akio Nishida, Akira Ueki
-
Patent number: 4713360Abstract: Novel self-supporting ceramic structures are produced by the oxidation reaction of a molten metal precursor with a vapor-phase oxidant to form an oxidation reaction product. Molten metal is drawn through the oxidation reaction product towards the oxidant to cause continued growth of the product at the interface between oxidant and previously formed product. This reaction or growth is continued to form a thick, self-supporting ceramic body. The resulting ceramic material of the polycrystalline growth product consists essentially of an oxidation reaction product and, optionally, one or more non-oxidized constituents of the metal precursor.Type: GrantFiled: January 15, 1986Date of Patent: December 15, 1987Assignee: Lanxide Technology Company, LPInventors: Marc S. Newkirk, Steven F. Dizio
-
Patent number: 4708763Abstract: The invention relates to a method of manufacturing bismuth germanate (Bi.sub.4 Ge.sub.3 O.sub.12) crystals using the Bridgman technique. A high degree of crystal perfection and an acceptable level of inclusions are obtained by changing the stoichiometry of the starting mixture in favor of Bi.sub.2 O.sub.3, such that the starting mixture contains between 40.2 and 40.5 mol. % of Bi.sub.2 O.sub.3 and between 59.8 and 59.5 mol. % of GeO.sub.2.Type: GrantFiled: December 9, 1986Date of Patent: November 24, 1987Assignee: U.S. Philips CorporationInventor: Leonardus A. H. van Hoof
-
Patent number: 4650895Abstract: High purity organometallic compounds can be obtained by the process which comprises subjecting an organometallic compound in a liquid state under stirring to preliminary oxidation or hydrolysis in a proportion of about 0.1 to 50% by weight of the organometallic compound to form solid reaction products, and separating by distillation the unreacted organometallic compound from the solid reaction products to recover the purified organometallic compound; and high purity metallic compounds such as a solid metallic hydroxide or oxide can be obtained by the process which comprises following the process as mentioned above, oxidizing or hydrolyzing completely the recovered purified organometallic compound.Type: GrantFiled: January 30, 1984Date of Patent: March 17, 1987Assignee: Sumitomo Chemical Company, LimitedInventors: Hidekimi Kadokura, Hiroshi Umezaki, Yoshihiro Higuchi
-
Patent number: 4647404Abstract: A process for preparing a metamorphosed metal oxide, which comprises heating, under a non-oxidative (and not hydrogenous) atmosphere, a mixture of at least one metal oxide, said metal being selected from the group consisting of elements of Groups III, IV, V and II b and transition elements in Periodic Table, and a carbide represented by the formula:C(M).sub.zwherein M is an element except carbon selected from the group consisting of elements of Groups III, IV and V in Periodic Table, and Z is an integer corresponding to the valency of M, is disclosed. The process is simple and safe and the metamorphosed metal oxide obtained is modified in color tint and provided with electroconductivity.Type: GrantFiled: November 19, 1984Date of Patent: March 3, 1987Assignee: Otsuka Chemical Co., Ltd.Inventors: Takuo Morimoto, Kihachiro Nishiuchi, Kenichi Wada
-
Patent number: 4629656Abstract: Ion exchange inorganic films made up of alpha-type or gamma-type layered structure insoluble acid salts of tetravalent metals or their salt forms, or their intercalated forms or their organic derivatives containing polar groups. A process for the preparation of said films.Type: GrantFiled: May 13, 1985Date of Patent: December 16, 1986Assignee: Consiglio Nazionale Delle RicercheInventors: Giulio Alberti, Umberto Costantino
-
Patent number: 4623424Abstract: A process for producing tin oxide fibers, which comprises forming a melt comprising a solute composed essentially of tin oxide and a solvent selected from the group consisting of copper, a copper alloy, tin or a tin alloy, evaporating the solute from the melt, and leading the evaporated solute to a low temperature zone, whereby tin oxide fibers are permitted to precipitate and grow in the low temperature zone.Type: GrantFiled: September 6, 1984Date of Patent: November 18, 1986Assignee: National Institute For Researches In Inorganic MaterialsInventors: Kenji Uchida, Eisuke Bannai
-
Patent number: 4612176Abstract: A process and apparatus for treating a gas containing a metal halide or an organo substituted metal halide which is drawn into a recovery chamber and is decomposed to a metal precipitate and hydrogen halide by reaction with a warm water spray. Gaseous hydrogen halide is then subjected to a cold water spray to reduce the hydrogen halide gas to an acid which is diluted and discarded as an effluent. The treated gas which is finally discarded to the environment contains substantially no metal halides or organo substituted metal halides and only a minimal concentration of hydrogen halide gas. Metal recovery is enhanced by controlling the pH of the metal oxide and the collected warm water spray and the metal precipitate which is collected in the recovery chamber.Type: GrantFiled: May 9, 1984Date of Patent: September 16, 1986Inventor: Carroll E. Stone
-
Patent number: 4571260Abstract: The invention relates to a method for recovering the metal values from materials containing at least one of zinc and tin, by smelting the starting materials under oxidizing conditions and reducing the resultant molten bath. The starting materials are first smelted in a furnace while adding flux, to form a slag which is sluggish at selected reduction temperatures and has a low lead contents. The reduction process is carried out while charging solid carbonaceous reduction agent and optionally also sulphur- and/or chlorine-donor material to the slag. The reduction agent and optionally supplied donor material is brought into suspension with the slag, and this suspension is sustained at least during the latter phase of the reduction period, at which the lead content of the slag has fallen to beneath about 1-2%, during which phase the reduction of zinc and tin takes place.Type: GrantFiled: January 29, 1985Date of Patent: February 18, 1986Assignee: Boliden AktiebolagInventors: Leif Johansson, Stig A. Petersson, Bengt O. Rudling
-
Patent number: 4515762Abstract: Waste gases resulting from the production of silicon in connection with the ormation or decomposition of chlorosilanes, which gases always contain hydrogen chloride, can be worked up without removal of the hydrogen chloride. For this purpose, the waste gases which, after separation from the chlorosilanes, only contain hydrogen and hydrogen chloride, are subjected to combustion with addition of air and, after addition of silicon tetrachloride, the result being highly dispersed SiO.sub.2. The hydrogen chloride then remaining in the gaseous phase is returned to the process stream for production of trichlorosilane.Type: GrantFiled: November 16, 1982Date of Patent: May 7, 1985Assignee: Wacker-Chemitronic Gesellschaft Fur Elektronik-Grundstoffe mbHInventors: Rudolf Griesshammer, Franz Koppl, Winfried Lang, Ernst Muhlhofer, Michael Schwab
-
Patent number: 4511545Abstract: The process and apparatus for removing metal halide gases from overspray generated during hot-end glass coating operations is disclosed. The excess metal halide gas is drawn into a recovery chamber in which it is decomposed to a metal oxide and a hydrogen halide gas by reaction with a warm water spray. The hydrogen halide gas is then subjected toa cold water spray to reduce the hydrogen halide gas to an acid which is diluted and discarded as an effluent. The treated overspray gas which is finally discarded to the environment contains substantially no metal halides and only a minimal concentration of hydrogen halide gas.Type: GrantFiled: May 10, 1983Date of Patent: April 16, 1985Assignee: American Engineering Group International, Inc.Inventors: Carroll E. Stone, William F. C. Seifert
-
Patent number: 4478812Abstract: The present invention relates to the preparation of materials and more particularly to the preparation of tin oxide materials.Thus, the present invention provides a process for the preparation of a tin oxide material by a gel precipitation process which includes contacting together a metal stannate, an organic gelling agent comprising a salt of a polycarboxylic acid and an acidic precipitating agent to form a gel precipitate.The gel precipitate may be treated further to provide the tin oxide material.The tin oxide material may be tin oxide as such, or a mixed oxide material containing tin oxide and an oxide of another element.Type: GrantFiled: August 12, 1983Date of Patent: October 23, 1984Assignee: United Kingdom Atomic Energy AuthorityInventor: Edward S. Lane
-
Patent number: 4465656Abstract: The specification discloses new and improved processes for forming water-free metal or non-metal oxide materials, which may then be melted and formed into optical components in vitreous or crystal form, which are free of the hydrogen-impurity absorption in the near infrared wavelength range. In one process, a water-free oxide is prepared by reacting a chosen nonpolar compound containing the desired metal or non-metal with an aprotic oxygen-containing compound to form the oxide as a precipitate in a chosen aprotic nonaqueous liquid solvent which provides a water-free environment during the formation of the oxide, to prevent the inclusion of water and water-derived impurities in the oxide as formed.Type: GrantFiled: April 4, 1982Date of Patent: August 14, 1984Assignee: Hughes Aircraft CompanyInventors: Ricardo C. Pastor, Antonio C. Pastor, Luisa E. Gorre, Remedios K. Chew
-
Patent number: 4462974Abstract: The specification discloses new and improved processes for forming water-free metal or non-metal oxide materials, which may then be melted and formed into optical components in vitreous or crystal form, which are free of the hydrogen-impurity absorption in the near infrared wavelength range. In one process a water-free oxide is prepared by reacting a chosen organic compound containing oxygen bonded to an atom of the metal or non-metal, with a chosen organic acid anhydride to form an intermediate product which is then decomposed to form the desired oxide and to simultaneously regenerate the organic acid anhydride. The regenerated organic acid anhydride reacts with and removes traces of water and water-derived impurities during the formation of the desired oxide and prevents the inclusion of these impurities in the oxide as formed.Type: GrantFiled: April 4, 1983Date of Patent: July 31, 1984Assignee: Hughes Aircraft CompanyInventors: Ricardo C. Pastor, Antonio C. Pastor, Luisa E. Gorre, Remedios K. Chew
-
Patent number: 4462970Abstract: The specification discloses a process for forming a water-free rare earth oxychloride powder by exposing a water-containing rare earth oxide powder to a reactive atmosphere of chlorine and oxygen at 1000.degree. C. for 24 hours to remove water impurities from the oxide powder and to simultaneously convert the oxide powder to the oxychloride powder.Type: GrantFiled: April 4, 1983Date of Patent: July 31, 1984Assignee: Hughes Aircraft CompanyInventors: Ricardo C. Pastor, Antonio C. Pastor, Luisa E. Gorre, Remedios K. Chew