Utilizing Ammonium Ions Patents (Class 502/86)
  • Patent number: 9018120
    Abstract: The present invention provides a process for the preparation of metal-doped zeolites comprising the steps of i) provision of a dry mixture of a) a zeolite, b) a compound of a catalytically active metal, ii) intimate grinding of the mixture, iii) heating of the mixture in a reactor, iv) cooling to room temperature and obtaining the metal-doped zeolite, wherein the internal pressure in the reactor during the heating is kept in a pressure range from 0 to ?200 millibar. The invention further relates to the use of a metal-doped zeolite prepared by means of the process according to the invention for the conversion of NOx and N2O into harmless products.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: April 28, 2015
    Assignee: Süd-Chemie IP GmbH & Co KG
    Inventors: Soovi Hurgobin, Arno Tissler, Ashveer Raghunandan, Attila Jambor, Rainer Rakoczy, Roderik Althoff
  • Patent number: 8951549
    Abstract: The invention relates to a method for reducing the concentration of amines and salts thereof, wherein the amines have the general chemical formula I R1R2R3N and the salts have the formula II R1R2R3N—H, wherein the amines and salts thereof exist in aqueous solution or aqueous suspension and are brought into contact with clinoptilolitic or clinoptilolite-containing mixtures. The method itself is suitable for use in food preparation and in the manufacture of foods. The inventive idea of reducing the concentration of amines and salts thereof is also useful in the manufacture of medical products for absorbing and for removing amines from the intestinal tract or the skin area of humans and animals.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: February 10, 2015
    Assignee: Froximun AG
    Inventors: Günter Steimecke, Steffen Hoffmann, Thomas Görner
  • Patent number: 8940652
    Abstract: A phosphorus modification of an FCC catalyst is provided by reducing the sodium content of the as formed catalyst, a first treatment with a phosphate solution, a second ammonium exchange to further reduce the sodium content of the phosphorus solution treated catalyst and a second treatment with a phosphate solution.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: January 27, 2015
    Assignee: BASF Corporation
    Inventors: Qi Fu, Chandrashekhar Pandurang Kelkar, Gary Smith, Bilge Yilmaz
  • Patent number: 8901364
    Abstract: Disclosed is a process for producing a hydrocarbon fraction rich in components boiling in the range typical for diesel fuel comprising contacting a feedstock comprising one or more C2 to C10 alkenes with a modified zeolite catalyst having a one-dimensional micropore structure consisting of channels made from rings containing between 8 and 12 silicon/aluminum atoms at a temperature in the range 100 to 500° C. and pressure in the range 0.1 to 200 bar characterized in that the modified zeolite catalyst is one which has been prepared by treating a corresponding zeolite precursor with an alkaline solution. The alkaline solution used to treat the zeolite precursor can be for example aqueous sodium hydroxide solution. Relative to equivalent untreated zeolites the modified zeolite catalysts described show improved catalyst life and selectivity to hydrocarbons boiling in the range 250 to 350° C.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: December 2, 2014
    Assignee: BP Corporation North America Inc.
    Inventors: Avelino Corma, Cristina Martinez, Eric J. Doskocil, George Yaluris
  • Patent number: 8901363
    Abstract: Disclosed is a process for producing a hydrocarbon fraction rich in components boiling in the range typical for diesel fuel comprising contacting a feedstock comprising one or more C2 to C10 alkenes with a zeolite catalyst having partially neutralised acidity and a one-dimensional or two dimensional micropore structure consisting of channels made from rings containing between 10 and 12 silicon/aluminium atoms at a temperature in the range 373 to 773 K and pressure in the range 0.1 to 200 bar characterised in that the partially neutralized zeolite catalyst contains both protons and basic cations. The basic cations are preferably selected from the group comprising Group IA and IIA cations (preferably sodium, potassium, caesium or mixtures thereof). Relative to their equivalent fully protonic forms the partially neutralized zeolite catalysts described show improved catalyst life and selectivity to hydrocarbons.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: December 2, 2014
    Assignee: BP Corporation North America Inc.
    Inventors: Avelino Corma, Cristina Martinez, Eric J. Doskocil, George Yaluris
  • Patent number: 8835341
    Abstract: A method for removing tightly bound sodium from a zeolitic support comprising contacting the support with a sodium specific removal agent to produce a treated support. A method comprising providing an aromatization catalyst comprising a treated support, and contacting the aromatization catalyst with a hydrocarbon feed in a reaction zone under conditions suitable for the production of an aromatic product. A catalyst support comprising an L-zeolite having less than 0.35 wt. % sodium.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: September 16, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventor: Gyanesh P. Khare
  • Patent number: 8598397
    Abstract: Described is a process for the treatment of at least one zeolite having a pore size of less than or equal to 7 ? comprising at least a) a step for dealumination of said zeolite, b) a cationic exchange step using at least one cation other than H+, c) a step for treatment of said zeolite obtained in step b) in the presence of at least one molecular compound containing at least one silicon atom, and d) at least one heat treatment step. The present invention also concerns the preparation of a catalyst containing the zeolite treated in accordance with the treatment process the subject-matter of the invention and the use of said catalyst in a process for the oligomerization of an olefinic charge containing hydrocarbon molecules having from 2 to 12 carbon atoms per molecule.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: December 3, 2013
    Assignee: IFP Energies nouvelles
    Inventors: Laurent Simon, Sylvie Lacombe
  • Patent number: 8273676
    Abstract: An animal litter such as a clay material is treated to reduce the bulk density thereof by contacting the clay material with an aqueous electrolyte solution and then heating at an elevated temperature. Substantial reductions in bulk density have been achieved without reducing the absorption capacity of the clay granule.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: September 25, 2012
    Assignee: Church & Dwight Co., Inc.
    Inventors: Robert Falcone, Steven T. Adamy, D. Mark Bracilovic, Frederick Lawson
  • Patent number: 8148285
    Abstract: A catalytic composition for hydrotreating of hydrocarbons is made in which a metallic component for hydrogenation is carried on a carrier formed of zeolite Y with aluminum and titanium inserted therein and a porous inorganic oxide. The zeolite Y has: unit cell dimension in a range from 24.25 to 24.60 ?, crystallinity of 95% or more, specific surface area of 500 m2/g or more, total pore volume of a group of pores each having a diameter of 600 ? or below in a range from 0.45 to 0.70 ml/g, pore volume of a group of pores each having a diameter in a range from 100 to 600 ? in a range from 0.10 to 0.40 ml/g, and pore volume of a group of pores each having a diameter in a range from 35 to 50 ? in a range 0.03 to 0.15 ml/g.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: April 3, 2012
    Assignees: Petroleum Energy Center, JGC Catalysts and Chemicals Ltd.
    Inventors: Ryuzo Kuroda, Masaru Ushio
  • Patent number: 8067327
    Abstract: The present invention provides modified molecular sieve membranes with improved CO2/CH4 separation selectivity and methods for making such membranes. The molecular sieve membranes are modified by adsorption of a modifying agent, such as ammonia, within and/or on the membrane.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: November 29, 2011
    Assignee: The Regents of the University of Colorado, a body corporate
    Inventors: Shiguang Li, Sara A. Arvidson, John L. Falconer, Richard D. Noble
  • Patent number: 7897719
    Abstract: The present invention provides a catalyst comprising a mixture of at least one acid-activated sheet silicate with a transition metal oxide of groups 8 and/or 9 of the Periodic Table of the Elements and also a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers, in which tetrahydrofuran is polymerized in the presence of at least one telogen and/or comonomer over such a catalyst.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: March 1, 2011
    Assignee: BASF SE
    Inventors: Stephan Hatscher, Michael Hesse, Tobias Wabnitz, Stefan Kashammer, Rolf Pinkos
  • Publication number: 20110020204
    Abstract: Disclosed are zeolite catalysts having the CHA crystal structure with a low silica to alumina ratio, as well as articles and systems incorporating the catalysts and methods for their preparation and use. The catalysts can be used to reduce NOx from exhaust gas streams, particularly those emanating from gasoline or diesel engines.
    Type: Application
    Filed: November 4, 2009
    Publication date: January 27, 2011
    Applicant: BASF Catalysts LLC
    Inventors: Ivor Bull, Ahmad Moini, Mukta Rai
  • Patent number: 7828875
    Abstract: The present invention provides modified molecular sieve membranes with improved CO2/CH4 separation selectivity and methods for making such membranes. The molecular sieve membranes are modified by adsorption of a modifying agent, such as ammonia, within and/or on the membrane.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: November 9, 2010
    Assignee: The Regents of the University of Colorado
    Inventors: Shiguang Li, Sara A. Arvidson, John L. Falconer, Richard D. Noble
  • Patent number: 7456249
    Abstract: The present invention relates to a solid, acid catalyst for the preparation of polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer, which has a BET surface area of at least 160 m2/g and an acid center density of at least 0.05 mmol/g for pKa values of from 1 to 6, to a process for preparing it and to a process for the polymerization of cyclic ethers over this catalyst.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: November 25, 2008
    Assignee: BASF SE
    Inventors: Stephan Schlitter, Martin Haubner, Michael Hesse, Stefan Kaeshammer, Rolf Pinkos, Christoph Sigwart
  • Publication number: 20080116131
    Abstract: Cost-effective tailored earth materials and methods of making and using these tailored earth materials are disclosed. These tailored earth materials can be used to treat (filter) emergent contaminants, such as perchlorate, from water or brine. The sorbed contaminants on the spent tailored earth materials can be degraded after use by bioremediation.
    Type: Application
    Filed: November 15, 2005
    Publication date: May 22, 2008
    Inventor: Valentine A. Nzengung
  • Patent number: 7259121
    Abstract: A method of reducing the N2O content in gases is described. A selected zeolite catalyst is used in the method. This catalyst is present in the H form and/or contains exchanged iron and is characterized by the presence of nonlattice aluminum in addition to the lattice aluminum in a molar ratio of from 1:2 to 20:1. The method can be used in nitric acid production for reducing the N2O content of process gases or offgases.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: August 21, 2007
    Assignee: UHDE GmbH
    Inventors: Meinhard Schwefer, Joachim Motz, Carsten Gehlen
  • Patent number: 7192900
    Abstract: Hydrocracking catalyst composition comprising an optional metal hydrogenation component supported on a carrier comprising a zeolite of the faujasite structure having a unit cell size in the range of from 24.10 to 24.40 ?, a bulk silica to alumina ratio (SAR) above about 12, and a surface area of at least about 850 m2/g as measured by the BET method and ATSM D4365-95 with nitrogen adsorption at a p/po value of 0.03.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: March 20, 2007
    Assignee: Shell Oil Company
    Inventors: Edward Julius Creyghton, Cornelis Ouwehand
  • Patent number: 7060645
    Abstract: The present invention provides a method for manufacturing a zeolite comprising following steps of: (1): calcining crystals obtained by hydrothermal synthesis reaction of a silicon compound; (2): contact treating a calcined product obtained by the step (1) with an aqueous solution including an amine and/or a quaternary ammonium compound; (3): calcining a treated product obtained by the step (2); and (4): contact treating the calcined product obtained by the step (3) with an aqueous solution including ammonia and/or an ammonium salt. According to the present invention, a method is also provided wherein ?-caprolactam is manufactured by Beckmann rearrangement reaction of cyclohexanone oxime in a gaseous phase in the presence of the zeolite manufactured by the above-described method.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: June 13, 2006
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masahiro Hoshino, Masaru Kitamura, Keisuke Sugita
  • Patent number: 6982074
    Abstract: A family of crystalline aluminosilicate zeolites designated UZM-5HS and derived from UZM-5 have been synthesized. The aluminum content of the UZM-5HS is lower than that of the starting UZM-5 thus changing its ion exchange capacity and acidity. These UZM-5HS are represented by the empirical formula: M1an+Al(1?x)ExSiy?Oz? and are prepared by treatments such as acid extraction and AFS treatments.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: January 3, 2006
    Assignee: UOP LLC
    Inventors: Deng-Yang Jan, Jaime G. Moscoso, Gregory J. Lewis, Michael G. Gatter, Beckay J. Mezza, Susan C. Koster
  • Patent number: 6806219
    Abstract: The present invention relates to zeolites X, most of the exchangeable sites of which are occupied by lithium and di- and/or trivalent cations, having an improved thermal stability and an improved crystallinity with respect to zeolites of the prior art with the same degree of exchange of lithium and of di- and/or trivalent cations. The zeolites of the present invention are particularly effective as adsorbents of the nitrogen present in various gas mixtures and are well suited to the noncryogenic separation of the gases of the air.
    Type: Grant
    Filed: January 3, 2001
    Date of Patent: October 19, 2004
    Assignee: Ceca, S.A.
    Inventors: Jean-Jacques Masini, Dominique Plee
  • Publication number: 20040141911
    Abstract: A zeolite of the faujasite structure having a silica to alumina molar ratio (bulk) of greater than about 13, a unit cell size in the range of from 24.10 to 24.40 Å, and a surface area of at least about 875 m2/g as measured by the BET method and ASTM D4365-95 with nitrogen adsorption at p/po values of 0.02, 0.03 and 0.04, is prepared by a combination of hydrothermal and dealumination techniques, and finds use as, for example, an adsorbent for polar and non-polar materials.
    Type: Application
    Filed: November 25, 2003
    Publication date: July 22, 2004
    Applicant: PQ Corporation, Inc.
    Inventors: David A. Cooper, Elliot P. Hertzenberg, William E. Cormier, Theodorus L. M. Maesen
  • Patent number: 6734131
    Abstract: A chromium containing catalyst wherein the chromium atom is in one of its higher valence states and is immobilized to a support-agglomerate composed of at least one inorganic oxide component and at least one ion-containing layered component.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: May 11, 2004
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Keng-Yu Shih, Dean Alexander Denton, Rimantas Glemza
  • Patent number: 6680271
    Abstract: Zeolite granulates having improved abrasion resistance, obtained by spraying the zeolite granulates with an aqueous silica sol solution and then optionally drying and calcining them.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: January 20, 2004
    Assignee: Grace GmbH & Co. KG
    Inventors: Frank Heindl, Eckehart Roland, Elke Kossel, Oliver Feuer
  • Patent number: 6660245
    Abstract: Structure-directing agents, such as quaternary ammonium, are removed from silicalite or zeolite crystals by oxidative attack (e.g., using CO2, H2O or NH3) first, by using a combination of ammonia, water and hydrogen peroxide at an elevated temperature; second, by using choline, hydrogen peroxide and a surfactant; third, by using ozonated water; and fourth, by exposing the crystals to an oxygen-containing plasma. Thin porous films of silicalite or zeolite crystals are useful, for example, in forming low dielectric constant insulating layers in semiconductor chip fabrication. In order for the silicalite or zeolite crystals to form a low dielectric constant film, however, the entrained molecules of the structure-directing agent must be removed.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: December 9, 2003
    Assignee: Novellus Systems, Inc.
    Inventors: Justin F. Gaynor, Patrick Vancleemput
  • Patent number: 6521208
    Abstract: A hydrophobic zeolite is prepared having high Hydrophobicity Index number by calcining a zeolite with steam under turbulent condition with respect to flow pattern of the zeolite and at a temperature within the range of 650-1000° C.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: February 18, 2003
    Assignee: PQ Corporation
    Inventors: David A. Cooper, William E. Cormier, Elliot P. Hertzenberg, Richard J. Hinchey, Bonita K. Marcus
  • Patent number: 6475465
    Abstract: The present invention relates to a titanium-silicalite (TS-1) molecular sieve and the method for preparation of the same, wherein each crystallite of said titanium-silicalite molecular sieve has a hollow cavity with a radial length of 5-300 nm. The benzene adsorption capacity of the molecular sieve determined at 25° C. and P/P0=0.10 for 1 hour is at least 70 mg/g; and the method for preparation of said molecular sieve comprises an acid-treatment and then an organic-base treatment of the synthesized TS-1 molecular sieve, or only an organic-base treatment. The TS-1 molecular sieve of the present invention has a relatively high reactivity and activity stability in the catalytic oxidation.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: November 5, 2002
    Assignees: China Petrochemical Corporation, Research Institute of Petroleum Processing, Sinopec
    Inventors: Min Lin, Xingtian Shu, Xieqing Wang, Bin Zhu
  • Patent number: 6440886
    Abstract: There is disclosed a new form of zeolite beta which shows substantially greater stability and greater catalyst lifetime when used in the alkylation and transalkylation of aromatic compounds. The new, surface-modified zeolite beta is characterized by having surface aluminum 2p binding energies, as measured by X-ray photoelectron spectroscopy, of at least 74.8 electron volts. This surface-modified zeolite beta is prepared by treating an as synthesized and templated zeolite beta with an acid at a pH between about 0 and about 2 at a temperature up to about 125° C. for a time sufficient to modify the chemical environment of the surface aluminum atom without bringing about dealumination of the zeolite beta, then calcining the acid-treated templated material at 550-700° C. to remove the template.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: August 27, 2002
    Assignee: UOP LLC
    Inventors: Gregory J. Gajda, Richard T. Gajek
  • Patent number: 6407025
    Abstract: Zeolites exchanged with lithium cations and polyvalent cations are prepared by first partially ion-exchanging a sodium-containing zeolite, a potassium-containing zeolite or a sodium- and potassium-containing zeolite with polyvalent cations, then heat-treating the partially polyvalent cation-exchanged zeolite, then ion exchanging the heat-treated zeolite with ammonium cations, and then reacting the ammonium cation-exchanged zeolite with a water-soluble lithium compound under conditions which result in the removal of ammonia from the reaction zone.
    Type: Grant
    Filed: February 10, 2000
    Date of Patent: June 18, 2002
    Assignees: The BOC Group, Inc., Chemiewerk Bad Köstritz GmbH
    Inventors: Alfons Brandt, Baldur Unger, Hartmut Tschritter, Martin Bülow, Frank R. Fitch, Adeola F. Ojo
  • Patent number: 6333289
    Abstract: The present invention relates to a process for activating catalysts for isomerizing aromatic compounds containing 8 carbon atoms, the catalysts containing at least one group VIII metal, comprising at least one sulfurization and at least one passivation using ammonia.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: December 25, 2001
    Assignee: Institut Francais du Petrole
    Inventors: Jean-François Joly, Julia Magne-Drisch, Fabio Alario, Elisabeth Merlen, Eric Benazzi, Sylvie Lacombe
  • Publication number: 20010053867
    Abstract: Process for isomerization of a feedstock that contains aromatic compounds with eight carbon atoms characterized in that it comprises at least one isomerization stage a) that is carried out in the presence of a catalyst that contains at least one metal of group VIII and that is activated according to an activation process that comprises at least one sulfurization stage and at least one stage for passivation with ammonia, and at least one dehydrogenation stage b).
    Type: Application
    Filed: September 9, 1999
    Publication date: December 20, 2001
    Inventors: JULIA MAGNE-DRISCH, VINCENT COUPARD, JEAN-FRANCOIS JOLY, FABIO ALARIO, ELISABETH MERLEN
  • Patent number: 6316647
    Abstract: Disclosed herein are a cation-exchanged clay mineral comprising a swelling clay mineral with the cations between layers substantially replaced by low-valence metal amine complexes and/or low-valence metal ammine complexes, and a packing material for chromatography using the same. Use of the packing material provides a sharp peak with respect to a highly unsaturated compound. Since the packing material is unlikely to be influenced by a solvent, it is usable for a long time with good stability.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: November 13, 2001
    Assignee: Shiseido Company, Ltd.
    Inventors: Yutaka Ohtsu, Isao Tanaka, Yasuhiko Kadota, Michihiro Yamaguchi
  • Patent number: 6316379
    Abstract: Provided herein is are acidic Z5M-5 zeollte materials which are highly active and selective in the synthesis of methyl tert-butyl ether (MTBE) and similar ethers. The materials are obtained by the preparation method comprising the main steps of: i) impregnation of zeolites with fluorine species using ammonium fluoride as precursor, preferably with a F loading of ca.1.9×103 mol.g−1 of zeolite; and ii) stepwise activation in air at preferably 250° C. and then preferably at 300° C. to 500° C., preferably 450° C. The method is preferably applied to desilicated ZSM-5 zeolite and provides conversion rates to MTBE superior to those obtained with prior art commercial AMBERLYSF™ resin (gas phase reaction at 70-80° C.) is obtained. No by-products, commonly produced by prior art commercial organic resin catalyst, are detected in the product spectrum.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: November 13, 2001
    Assignee: Concordia University
    Inventor: Raymond Le Van Mao
  • Patent number: 6303530
    Abstract: A method for preparing a catalyst having one or more noble metals disposed in a relatively homogeneous distribution on a base which includes an inorganic refractory binder and a zeolite. The method provides for uniformly depositing noble metals on the base after it is formed, without unnecessarily displacing desirable nonframework cations, such as sodium, from the zeolite.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: October 16, 2001
    Assignee: BP Corporation North America Inc.
    Inventors: Michael M. Schwartz, William J. Reagan, Jeffrey T. Miller
  • Patent number: 6303099
    Abstract: A process for producing a pentacyl-type crystalline zeolite is provided which comprises the steps of (i) preparing a mixture of a silicon compound, water and tetrapropyl ammonium hydroxide, (ii) conducting a hydrothermal reaction of the mixture to obtain a reaction mixture containing zeolite crystals, (iii) separating zeolite crystals from the reaction mixture to collect a remaining solution, (iv) calcinating the resulting zeolite crystals, (v) treating the calcinated zeolite crystals with a solution such as ammonia water and (vi) recycling the solution collected in step (iii) to step (i), wherein in the mixture prepared in step (i) a molar ratio of hydroxide ion to silicon is from about 0.1 to about 0.4 and a molar ratio of potassium to silicon is about 0.1 or less. With this process, a zeolite catalyst having good performance can be produced with good reproducibility.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: October 16, 2001
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroshi Ichihashi, Keisuke Sugita, Makoto Yako
  • Patent number: 6300270
    Abstract: A catalyst composition prepared by a method which comprises incorporating at least one transition metal into a calcined zeolite-silica material, calcining the resulting transition metal-incorporated calcined zeolite-silica material and contacting the resulting calcined transition metal-incorporated calcined zeolite-silica material with ammonium sulfide is disclosed. The thus-obtained catalyst composition is employed as a catalyst in the conversion of a hydrocarbon feedstock to at least one aromatic.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: October 9, 2001
    Assignee: Richmond, Hitchcock, Fish & Dollar
    Inventors: An-hsiang Wu, Charles A. Drake
  • Patent number: 6218329
    Abstract: A process for the preparation of an amorphous alumino-silicate derivative which involves reacting a solid corresponding starting material with MOH where M is alkali metal or ammonium cation. The solid corresponding starting material may be selected from montmorillonite, kaolin, natural zeolite (e.g., clinoliptolite/heulandite) as well as illite, palygorskite and saponite and additional reactant MX wherein X is halide may be utilized in conjunction with MOH. The invention also includes alumino-silicate derivatives of the general formula MpAlqSi2Or(OH)sXt.uH2O as well as alumino-silicate derivatives of the general formula MpAlqSi2Or(OH)s.uH2O.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: April 17, 2001
    Assignee: The University of Queensland
    Inventors: Balbir Singh, Ian Donald Richard Mackinnon, David Page
  • Patent number: 6200919
    Abstract: The formation of new materials in the form of alumino-silicate derivatives from 2:1 layer clay materials which are obtained by the chemical modification of 2:1 layer clay minerals by reaction with a salt having the formula MX wherein M is ammonium ion or alkali metal cation and X is a halide. The new materials have the following characteristics: (a) an amorphous x-ray diffraction signal manifest as a broad hump using x-ray powder diffraction between 22° and 32° 2&thgr; using CuK&agr; radiation; and (b) the presence of primarily tetrahedrally coordinated aluminum.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: March 13, 2001
    Assignee: The University of Queensland
    Inventors: Balbir Singh, Ian Donald Richard MacKinnon, David Page
  • Patent number: 6165439
    Abstract: The invention concerns a NU-86 zeolite comprising silicon and at least one element T selected from the group formed by aluminium, iron, gallium and boron, preferably aluminium, characterized in that element T has been extracted from the framework, and in that it has a global Si/T atomic ratio of more than about 20. Element T is extracted from the zeolitic framework (or network) by means of at least one heat treatment, optionally carried out in the presence of steam, followed by at least one acid attack using at least one solution of a mineral or organic acid, or by direct acid attack. The invention also concerns a catalyst comprising the zeolite which is at least partially in its acid form, and the use of the catalyst for the conversion of hydrocarbons, in particular for the oligomerization of olefins.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: December 26, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Eric Benazzi, Nicolas Chouteau, Herve Cauffriez
  • Patent number: 6162416
    Abstract: There is disclosed a new form of zeolite beta which shows substantially greater stability and greater catalyst lifetime when used in the alkylation and transalkylation of aromatic compounds. The new, surface-modified zeolite beta is characterized by having surface aluminum 2p binding energies, as measured by X-ray photoelectron spectroscopy, of at least 74.8 electron volts. This surface-modified zeolite beta is prepared by treating an as synthesized and templated zeolite beta with an acid at a pH between about 0 and about 2 at a temperature up to about 125.degree. C. for a time sufficient to modify the chemical environment of the surface aluminum atom without bringing about dealumination of the zeolite beta, then calcining the acid-treated templated material at 550-700.degree. C. to remove the template.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: December 19, 2000
    Assignee: UOP LLC
    Inventors: Gregory J. Gajda, Richard T. Gajek
  • Patent number: 6150294
    Abstract: A process for producing a crystalline silicate catalyst having a monoclinic structure, the process comprising providing a crystalline silicate of the MFI-type having a silicon/aluminum atomic ratio lower than 80; treating the crystalline silicate with steam and thereafter leaching aluminum from the crystalline silicate by contact with an aqueous solution of a leachant to provide a silicon/aluminum atomic ratio in the catalyst of at least 80 whereby the catalyst has a monoclinic structure.
    Type: Grant
    Filed: December 5, 1998
    Date of Patent: November 21, 2000
    Assignee: Fina Research, S.A.
    Inventors: Jean-Pierre Dath, Luc Delorme, Jacques-Fran.cedilla.ois Grootjans, Xavier Vanhaeren, Walter Vermeiren
  • Patent number: 6136291
    Abstract: Novel crystalline zeolitic materials of the faujasite structure having an increased ratio of zeolitic surface area to mesoporous surface area and distinctive X-Ray Diffraction peak ratios are produced by calcining zeolite Y of low sodium content at temperatures above 600.degree. C.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: October 24, 2000
    Assignee: Mobile Oil Corporation
    Inventors: Arthur W. Chester, C. Patricia Clement, Scott Han
  • Patent number: 6124228
    Abstract: A catalyst, method for preparing the catalyst, and method for using the catalyst having improved conversion and/or selectivity in the dehydrogenation of hydrocarbons. The catalyst being prepared by modifying and impregnating a mazzite zeolite. Modification of the original mazzite zeolite may include steps for ion-exchanging, dealuminating, physically mixing with chromic oxide, shaping, and calcining. Once modified, the mazzite zeolite may be impregnated with at least one metal selected from the group consisting of chromium, molybdenum, tungsten and oxides of these metals.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: September 26, 2000
    Assignee: Phillips Petroleum Company
    Inventors: An-hsiang Wu, Charles A. Drake
  • Patent number: 6114267
    Abstract: A process for preparation of fluidized catalytic cracking (FCC) catalyst, comprising silicon stabilized large crystallite sized synthetic faujasite zeolite, aluminum depleted and normal kaolin clay, alumina and silica. The cracking catalyst is highly active and selective for bottom upgradation, it produces less coke and higher gasoline and total cycle oil (TCO) and possesses improved metal tolerance properties when evaluated and compared with a commercial catalyst under conditions of a typical FCC unit in a petroleum refinery.
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: September 5, 2000
    Inventors: Sobhan Ghosh, Satish Makhija, Mohan Prabhu Kuvettu, Ventachalam Krishnan, Sanjay Kumar Ray, Manoranjan Santra, Ram Mohan Thakur, Jagdev Kumar Dixit
  • Patent number: 6087514
    Abstract: Disclosed are novel crystalline molecular sieves having the framework of ETS-10 titanium silicate which contain both octahedral and tetrahedral titanium atoms and are in acid form. The sieves are prepared by adding a complexing agent such as hydrogen peroxide during synthesis or by treating a synthesized titanium silicate molecular sieve with a reagent that replaces tetrahedral silicon with tetrahedral titanium atoms.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: July 11, 2000
    Assignee: Engelhard Corporation
    Inventors: Appadurai Thangaraj, Steven M. Kuznicki, Gerald S. Koermer
  • Patent number: 6071844
    Abstract: A method of producing .epsilon.-caprolactam from cyclohexanone in the gaseous phase using MFI catalysts on whose surface symmetrically arranged OH groups are present.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: June 6, 2000
    Assignee: Degussa-Huls Aktiengesellschaft
    Inventors: Wolfgang Hoelderich, Joerg Roeseller, Dietrich Arntz
  • Patent number: 6054113
    Abstract: A method for preparing novel zeolitic catalyst compositions having a high Si/Al ratio and a crystallinity of at least about 70%. The method involves cation exchanging an as synthesized faujasite material having an Si/Al greater than about 4 with a component selected from the group consisting of ammonium ions and mineral acids, then steam calcining said cation exchanged faujasite in a single steam calcination step at a temperature from about 900.degree. F. to about 1 500.degree. F.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: April 25, 2000
    Assignee: Exxon Research and Engineering Co.
    Inventors: David E. W. Vaughan, Karl G. Strohmaier, Gary B. McVicker, Owen C. Feeley
  • Patent number: 6051521
    Abstract: This invention provides a method of producing an aromatics alkylation catalyst comprising the steps of:(a) synthesizing a layered oxide material MCM-56 in the presence of alkali and/or alkaline earth metal cations;(b) prior to any calcination of the MCM-56, subjecting the MCM-56 produced in step (a) to ammonium ion exchange so as to at least partially replace the alkaline or alkaline earth metal cations associated with the MCM-56 with ammonium ions; then(c) heating the ammonium-exchanged MCM-56 to decompose the ammonium cations and convert the MCM-56 into the hydrogen form; and(d) after step (b), forming the MCM-56 into catalyst particles.The resultant catalyst exhibits enhanced activity in the alkylation of benzene with ethylene and propylene.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: April 18, 2000
    Assignee: Mobil Oil Corporation
    Inventors: Jane C. Cheng, Hye Kyung C. Timken
  • Patent number: 6043178
    Abstract: A midbarrel hydrocracking catalyst includes the following:a. 10-75% by weight of a Y-type molecular sieve;b. 10-25% by weight of a small pore alumina;c. 0-40% by weight of an amorphous aluminosilicate;d. 0-25 % by weight of a large pore alumina;e. 12-32% by weight of a Group VIB metal oxide, andf. 3-8% by weight of a Group VIII metal oxide.The Y-type molecular sieve is a high silica Y-type molecular sieve USSSY of a Na.sub.2 O content of no more than 0.2% by weight, a SiO.sub.2 to AJ.sub.2 O.sub.3 molar ratio of 6-40, a relative crystallinity of more than 80% and a unit cell size of 2.426-2.44 nm.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: March 28, 2000
    Inventors: Zaigui Ge, Minghua Guan, Yongkang Hu, Lianhui Ding
  • Patent number: 6036846
    Abstract: The invention concerns a process for improving the pour point of a feed comprising paraffins containing more than 10 carbon atoms, in which process the feed to be treated is brought into contact with a catalyst comprising an NU-87 zeolite comprising silicon and at least one clement T selected from the group formed by Al, Fe, Ga and B, from which at least a portion of clement T has been removed, and having a global Si/T ratio of over 20, the catalyst also containing at least one hydro-dehydrogenating element. The process is carried out at a temperature which is in the range 170.degree. C. to 500.degree. C., a pressure in the range 1 to 250 bar and at an hourly space velocity in the range 0.05 to 100 h.sup.-1, in the presence of hydrogen in a proportion of 50 to 2000 l/l of feed. The oils obtained have good pour points and high viscosity indices (VI). The process is also applicable to gas oils and other feeds requiring a reduction of pour point. The catalyst is also claimed.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: March 14, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Eric Benazzi, Nathalie George-Marchal, Christophe Gueret, Patrick Briot, Alain Billon, Pierre Marion
  • Patent number: 6017508
    Abstract: A process of modifying the porosity of an aluminosilicate or silica whose porosity is not amenable to modification by acid extraction. The process involves contacting said aluminosilicate or silica with an alkali aluminate, and then extracting the aluminate-treated material with an extraction agent so as to form the porosity-modified aluminosilicate or silica. The process is applicable to zeolites which are unreactive under acid extraction conditions, e.g. ferrierite, and applicable to zeolites which are structurally unstable under acid extraction conditions, such as the mineral bikitaite. Mesoporous compositions are disclosed, including a mesoporous ferrierite and a mesoporous zeolite DCM-3.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: January 25, 2000
    Assignee: The Dow Chemical Company
    Inventors: Dean M. Millar, Juan M. Garces