Coprecipitating Patents (Class 502/234)
  • Patent number: 5466646
    Abstract: A process for the preparation of solid state materials such as catalysts, electrolytes, piezo electric materials and superconductors is disclosed. The process produces materials with high phase purity. Novel solid state materials having high phase purity are also disclosed.
    Type: Grant
    Filed: August 18, 1992
    Date of Patent: November 14, 1995
    Assignee: Worcester Polytechnic Institute
    Inventor: William R. Moser
  • Patent number: 5434118
    Abstract: A catalytically active gel product is described consisting of a silica matrix which is amorphous to x-rays with uniform porosity, monomodal pore distribution and high surface area, within which one or more metal oxides possessing catalytic activity are dispersed. A process for preparing this catalytic gel is also described.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: July 18, 1995
    Assignees: Eniricerche S.p.A., Snamprogetti SpA
    Inventors: Angela Carati, Enrico Davini, Mario G. Clerici, Giuseppe Bellussi
  • Patent number: 5356847
    Abstract: A formed nickel catalyst useful in fixed bed hydrogenation of fatty materials is described. The catalyst comprises from about 10% to about 50% by weight of nickel and from about 3% to about 30% by weight of at least one clay mineral binder. The catalyst may also contain from about 20% to about 60% by weight of silica and from about 1% to about 10% by weight of alumina. A process also is described for preparing such formed nickel catalyst. The use of such nickel catalyst in the hydrogenation of fatty materials such as fatty acids and esters also is described.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: October 18, 1994
    Assignee: Engelhard Corporation
    Inventor: John H. Henderson
  • Patent number: 5130288
    Abstract: The composition of this invention is a silicated zinc oxide that comprises a co-gelled mixture comprising zinc oxide and silica. This co-gelled mixture is used as a sorbent for removing sulfur compounds from sulfur containing fluids by contacting such fluids with the sorbent. The composition can be prepared by a silicating process wherein the compositon is manufactured by silicating zinc oxide to form a co-gelled mixture.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: July 14, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Gary A. Delzer, Dennis R. Kidd
  • Patent number: 5112792
    Abstract: The invention provides a nickel/silica catalyst optionally also containing cations of a lower Group II metal (X), which catalyst satisfies the following combination of features:1) a molar ratio of SiO.sub.2 /Ni=0.15=0.352) a molar ratio of X/Ni=0-0.153) an active nickel surface area above 120m.sup.2 /g4) a BET surface area of which at least 60% is found with pores with a radius below 1.5 nm.Preferably the catalyst has an atomic X/Ni ratio between 0.5-0.10 and a BET surface area of which at least 60% is found in pores having a pore radius of below 1.4 nm. The group II metal X is preferably magnesium or barium.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: May 12, 1992
    Inventor: Cornelis M. Lok
  • Patent number: 5073531
    Abstract: Sodium-free olefin polymerization catalysts having high polymerization activities and methods of preparing such catalysts are provided. A hydrolyzable silicate ester and a hydrolyzable acid-generating chromium compound are combined with water and an organic solvent whereby a hydrolysis reaction solution is formed comprising silica and chromium. Sufficient acid-neutralizing gelling agent is added to the solution to form a gelled silica-chromium catalyst and the catalyst is aged to stabilize its structure. Water and solvent are removed from the catalyst and the catalyst is activated.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: December 17, 1991
    Assignee: Phillips Petroleum Company
    Inventor: Donald R. Witt
  • Patent number: 5051390
    Abstract: A process for the preparation of a cogel catalyst comprises preparing an aqueous solution containing a soluble compound of an alkali or alkaline earth metal, a soluble metal compound which is thermally decomposable to a metal oxide capable of converting methane to higher hydrocarbons and a hydrolysable silane under such conditions that a homogenous cogel is formed. The cogel catalyst is effective for oxidizing methane to higher hydrocarbons and exhibits greater selectivity and lasts longer than conventional prior art catalysts. A process for using the cogel catalyst to effect oxidation of methane is also described.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: September 24, 1991
    Assignee: The British Petroleum Company, p.l.c.
    Inventors: Paul A. Diddams, Ian R. Little, Steven R. Wade
  • Patent number: 4994425
    Abstract: A silica-magnesia cogelled material is usable as a base for petroleum cracking catalysts based on zeolites. Invention described provides cogel base in which the silica and magnesia components are intimately mixed. This feature is achieved by controlling the pH during the mixing procedure.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: February 19, 1991
    Assignee: Unilever Patent Holdings B.V.
    Inventor: Andrew P. Chapple
  • Patent number: 4920087
    Abstract: Catalytic cracking catalysts which contain a basic alkaline earth metal component in amounts greater than 5 percent by weight (expressed as the oxides) are used to crack hydrocarbon feedstocks that contain substantial quantities of metals such as vanadium, nickel, copper and iron. In a particularly preferred embodiment natural or synthetic particulate magnesium oxide (MgO) containing composites such as dolomite or a formed particulate coprecipitated magnesia-silica cogel (MgO.SiO.sub.2) having a substantial intra-particle pore volume in pores ranging from about 200-10,000 .ANG. in diameter and an average pore diameter greater than about 400 .ANG. in the 200-10,000 .ANG. diameter range is mixed with a zeolite containing fluid cracking catalyst (FCC) either as an integral component of the catalyst particle or as a separate additive.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: April 24, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Richard F. Wormsbecher
  • Patent number: 4849395
    Abstract: Amorphous metal/magnesium silicates of the general formulaM.sub.x Mg.sub.y (SiO.sub.2).nH.sub.2 O.where M is a divalent, reducible metal atom from the group consisting of Cu, FeII, Co and Ni, x and y are numbers which together can add up to a value of 1.5 and n after drying, expressed in % by weight, ranges from 0 to 80 are prepared by subjecting a freshly precipitated magnesium silicate to an ion exchange, washing the product and then neutralizing it with an alkali and are used in catalytic reactions after the reducible metal in the metal/magnesium silicates has been converted into the metallic state with a reducing gas.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: July 18, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Laszlo Marosi, Joachim Stabenow, Knut Eger, Matthias Irgang, Guenter Zirker
  • Patent number: 4849394
    Abstract: A silica-magnesia cogelled material is usable as a base for petroleum cracking catalysts based on zeolites. Invention described provides cogel base in which the silica and magnesia components are intimately mixed. This feature is achieved by controlling the pH during the mixing procedure.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: July 18, 1989
    Assignee: Unilever Patent Holdings B.V.
    Inventor: Andrew P. Chapple
  • Patent number: 4780446
    Abstract: A precipitated alumina-silica cogel which possesses a high total pore volume and wide pore size distribution. The precipitated cogel is used to prepare catalysts and catalyst supports that are used in the catalytic conversion and processing of hydrocarbons.
    Type: Grant
    Filed: February 1, 1985
    Date of Patent: October 25, 1988
    Assignee: W. R. Grace & Co.
    Inventors: Richard J. Nozemack, Joseph F. Porinchak
  • Patent number: 4567030
    Abstract: Disclosed is an amorphous, spherical inorganic compound having a particle size of 0.1 to 1.0 .mu.m, which comprises as main constituents (1) an oxide of at least one metal selected from the group consisting of metals of the Groups I, II, III and IV of the Periodic Table, said metal oxide being capable of combining with silicon dioxide, and (2) silica.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: January 28, 1986
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Shigeki Yuasa, Minahiro Okabayashi, Hideki Ohno, Katsumi Suzuki, Koshi Kusumoto
  • Patent number: 4540681
    Abstract: The invention involves the synergistic effect of the specific catalytic constituents on a specific series of carriers for the methanation of carbon monoxide in the presence of sulfur at relatively high temperatures and at low steam to gas ratios in the range of 0.2:1 or less. This effect was obtained with catalysts comprising the mixed sulfides and oxides of nickel and chromium supported on carriers comprising magnesium aluminate and magnesium silicate. Conversion of carbon monoxide to methane was in the range of from 40 to 80%. Tests of this combination of metal oxides and sulfides on other carriers and tests of other metal oxides and sulfides on the same carrier produced a much lower level of conversion.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: September 10, 1985
    Assignee: United Catalysts, Inc.
    Inventors: William A. Kustes, Arthur L. Hausberger
  • Patent number: 4439544
    Abstract: Supported coprecipitated cobalt-silica hydrogenation catalysts are disclosed. The catalysts are prepared by: preparing an aqueous reaction mixture containing cobalt cations, silicate anions and solid porous carrier particles under agitation to form a coprecipitate of the cobalt and silicate ions onto said solid porous support particles; heating the aqueous reaction mixture; and adding an alkaline precipitating agent to further precipitate the cobalt and silicate ions onto said solid porous carrier particles. The aqueous reaction mixture may additionally include copper cations.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: March 27, 1984
    Assignee: Exxon Research and Engineering Co.
    Inventors: James L. Carter, Allan E. Barnett
  • Patent number: 4434280
    Abstract: A silica base for a chromium olefin polymerization catalyst is subjected to a high temperature treatment as for instance by passing the silica through a flame in order to alter the surface characteristics. The chromium can be present during the flame treatment or added later. The result is a catalyst capable of giving a broader molecular weight distribution polymer which is of particular value with the silica-titania coprecipitated catalyst used in slurry olefin polymerization.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: February 28, 1984
    Assignee: Phillips Petroleum Company
    Inventors: Max P. McDaniel, M. Bruce Welch