Utilizing Ammonium Ions Patents (Class 502/86)
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Patent number: 11358118Abstract: The present invention relates to zeolite adsorbents based on agglomerated crystals of zeolite(s) comprising barium and strontium These adsorbents have applications in the separation of fractions of aromatic C8 isomers and in particular xylene.Type: GrantFiled: December 17, 2018Date of Patent: June 14, 2022Assignees: Arkema France, IFP Energies NouvellesInventors: Ludivine Bouvier, Javier Perez-Pellitero, Marie-Laurence Labede, Guillaume Blancke
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Patent number: 9018120Abstract: 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: GrantFiled: July 19, 2007Date of Patent: April 28, 2015Assignee: Süd-Chemie IP GmbH & Co KGInventors: Soovi Hurgobin, Arno Tissler, Ashveer Raghunandan, Attila Jambor, Rainer Rakoczy, Roderik Althoff
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Patent number: 8951549Abstract: 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: GrantFiled: November 16, 2009Date of Patent: February 10, 2015Assignee: Froximun AGInventors: Günter Steimecke, Steffen Hoffmann, Thomas Görner
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Patent number: 8940652Abstract: 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: GrantFiled: November 5, 2012Date of Patent: January 27, 2015Assignee: BASF CorporationInventors: Qi Fu, Chandrashekhar Pandurang Kelkar, Gary Smith, Bilge Yilmaz
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Patent number: 8901364Abstract: 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: GrantFiled: June 22, 2010Date of Patent: December 2, 2014Assignee: BP Corporation North America Inc.Inventors: Avelino Corma, Cristina Martinez, Eric J. Doskocil, George Yaluris
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Patent number: 8901363Abstract: 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: GrantFiled: May 5, 2011Date of Patent: December 2, 2014Assignee: BP Corporation North America Inc.Inventors: Avelino Corma, Cristina Martinez, Eric J. Doskocil, George Yaluris
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Patent number: 8835341Abstract: 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: GrantFiled: September 7, 2011Date of Patent: September 16, 2014Assignee: Chevron Phillips Chemical Company LPInventor: Gyanesh P. Khare
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Patent number: 8598397Abstract: 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: GrantFiled: June 22, 2006Date of Patent: December 3, 2013Assignee: IFP Energies nouvellesInventors: Laurent Simon, Sylvie Lacombe
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Patent number: 8273676Abstract: 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: GrantFiled: April 17, 2008Date of Patent: September 25, 2012Assignee: Church & Dwight Co., Inc.Inventors: Robert Falcone, Steven T. Adamy, D. Mark Bracilovic, Frederick Lawson
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Patent number: 8148285Abstract: 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: GrantFiled: June 21, 2011Date of Patent: April 3, 2012Assignees: Petroleum Energy Center, JGC Catalysts and Chemicals Ltd.Inventors: Ryuzo Kuroda, Masaru Ushio
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Patent number: 8067327Abstract: 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: GrantFiled: September 30, 2010Date of Patent: November 29, 2011Assignee: The Regents of the University of Colorado, a body corporateInventors: Shiguang Li, Sara A. Arvidson, John L. Falconer, Richard D. Noble
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Patent number: 7897719Abstract: 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: GrantFiled: November 30, 2006Date of Patent: March 1, 2011Assignee: BASF SEInventors: Stephan Hatscher, Michael Hesse, Tobias Wabnitz, Stefan Kashammer, Rolf Pinkos
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Publication number: 20110020204Abstract: 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: ApplicationFiled: November 4, 2009Publication date: January 27, 2011Applicant: BASF Catalysts LLCInventors: Ivor Bull, Ahmad Moini, Mukta Rai
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Patent number: 7828875Abstract: 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: GrantFiled: August 1, 2005Date of Patent: November 9, 2010Assignee: The Regents of the University of ColoradoInventors: Shiguang Li, Sara A. Arvidson, John L. Falconer, Richard D. Noble
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Patent number: 7456249Abstract: 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: GrantFiled: January 10, 2008Date of Patent: November 25, 2008Assignee: BASF SEInventors: Stephan Schlitter, Martin Haubner, Michael Hesse, Stefan Kaeshammer, Rolf Pinkos, Christoph Sigwart
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Publication number: 20080116131Abstract: 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: ApplicationFiled: November 15, 2005Publication date: May 22, 2008Inventor: Valentine A. Nzengung
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Patent number: 7259121Abstract: 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: GrantFiled: March 6, 2002Date of Patent: August 21, 2007Assignee: UHDE GmbHInventors: Meinhard Schwefer, Joachim Motz, Carsten Gehlen
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Patent number: 7192900Abstract: 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: GrantFiled: November 24, 2003Date of Patent: March 20, 2007Assignee: Shell Oil CompanyInventors: Edward Julius Creyghton, Cornelis Ouwehand
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Patent number: 7060645Abstract: 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: GrantFiled: June 24, 2005Date of Patent: June 13, 2006Assignee: Sumitomo Chemical Company, LimitedInventors: Masahiro Hoshino, Masaru Kitamura, Keisuke Sugita
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Patent number: 6982074Abstract: 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: GrantFiled: September 20, 2002Date of Patent: January 3, 2006Assignee: UOP LLCInventors: Deng-Yang Jan, Jaime G. Moscoso, Gregory J. Lewis, Michael G. Gatter, Beckay J. Mezza, Susan C. Koster
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Patent number: 6806219Abstract: 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: GrantFiled: January 3, 2001Date of Patent: October 19, 2004Assignee: Ceca, S.A.Inventors: Jean-Jacques Masini, Dominique Plee
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Publication number: 20040141911Abstract: 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: ApplicationFiled: November 25, 2003Publication date: July 22, 2004Applicant: PQ Corporation, Inc.Inventors: David A. Cooper, Elliot P. Hertzenberg, William E. Cormier, Theodorus L. M. Maesen
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Patent number: 6734131Abstract: 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: GrantFiled: April 10, 2002Date of Patent: May 11, 2004Assignee: W. R. Grace & Co.-Conn.Inventors: Keng-Yu Shih, Dean Alexander Denton, Rimantas Glemza
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Patent number: 6680271Abstract: 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: GrantFiled: June 20, 2000Date of Patent: January 20, 2004Assignee: Grace GmbH & Co. KGInventors: Frank Heindl, Eckehart Roland, Elke Kossel, Oliver Feuer
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Patent number: 6660245Abstract: 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: GrantFiled: January 11, 2002Date of Patent: December 9, 2003Assignee: Novellus Systems, Inc.Inventors: Justin F. Gaynor, Patrick Vancleemput
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Patent number: 6521208Abstract: 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: GrantFiled: December 19, 2000Date of Patent: February 18, 2003Assignee: PQ CorporationInventors: David A. Cooper, William E. Cormier, Elliot P. Hertzenberg, Richard J. Hinchey, Bonita K. Marcus
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Patent number: 6475465Abstract: 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: GrantFiled: December 6, 2000Date of Patent: November 5, 2002Assignees: China Petrochemical Corporation, Research Institute of Petroleum Processing, SinopecInventors: Min Lin, Xingtian Shu, Xieqing Wang, Bin Zhu
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Patent number: 6440886Abstract: 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: GrantFiled: November 3, 2000Date of Patent: August 27, 2002Assignee: UOP LLCInventors: Gregory J. Gajda, Richard T. Gajek
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Patent number: 6407025Abstract: 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: GrantFiled: February 10, 2000Date of Patent: June 18, 2002Assignees: The BOC Group, Inc., Chemiewerk Bad Köstritz GmbHInventors: Alfons Brandt, Baldur Unger, Hartmut Tschritter, Martin Bülow, Frank R. Fitch, Adeola F. Ojo
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Patent number: 6333289Abstract: 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: GrantFiled: April 9, 1999Date of Patent: December 25, 2001Assignee: Institut Francais du PetroleInventors: Jean-François Joly, Julia Magne-Drisch, Fabio Alario, Elisabeth Merlen, Eric Benazzi, Sylvie Lacombe
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Publication number: 20010053867Abstract: 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: ApplicationFiled: September 9, 1999Publication date: December 20, 2001Inventors: JULIA MAGNE-DRISCH, VINCENT COUPARD, JEAN-FRANCOIS JOLY, FABIO ALARIO, ELISABETH MERLEN
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Patent number: 6316379Abstract: 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: GrantFiled: June 14, 1999Date of Patent: November 13, 2001Assignee: Concordia UniversityInventor: Raymond Le Van Mao
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Patent number: 6316647Abstract: 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: GrantFiled: January 22, 1999Date of Patent: November 13, 2001Assignee: Shiseido Company, Ltd.Inventors: Yutaka Ohtsu, Isao Tanaka, Yasuhiko Kadota, Michihiro Yamaguchi
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Patent number: 6303530Abstract: 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: GrantFiled: July 22, 1999Date of Patent: October 16, 2001Assignee: BP Corporation North America Inc.Inventors: Michael M. Schwartz, William J. Reagan, Jeffrey T. Miller
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Patent number: 6303099Abstract: 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: GrantFiled: June 28, 2000Date of Patent: October 16, 2001Assignee: Sumitomo Chemical Company, LimitedInventors: Hiroshi Ichihashi, Keisuke Sugita, Makoto Yako
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Patent number: 6300270Abstract: 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: GrantFiled: March 3, 1999Date of Patent: October 9, 2001Assignee: Richmond, Hitchcock, Fish & DollarInventors: An-hsiang Wu, Charles A. Drake
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Patent number: 6218329Abstract: 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: GrantFiled: April 14, 1997Date of Patent: April 17, 2001Assignee: The University of QueenslandInventors: Balbir Singh, Ian Donald Richard Mackinnon, David Page
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Patent number: 6200919Abstract: 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: GrantFiled: April 14, 1997Date of Patent: March 13, 2001Assignee: The University of QueenslandInventors: Balbir Singh, Ian Donald Richard MacKinnon, David Page
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Patent number: 6165439Abstract: 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: GrantFiled: November 19, 1997Date of Patent: December 26, 2000Assignee: Institut Francais du PetroleInventors: Eric Benazzi, Nicolas Chouteau, Herve Cauffriez
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Patent number: 6162416Abstract: 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: GrantFiled: February 24, 1999Date of Patent: December 19, 2000Assignee: UOP LLCInventors: Gregory J. Gajda, Richard T. Gajek
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Patent number: 6150294Abstract: 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: GrantFiled: December 5, 1998Date of Patent: November 21, 2000Assignee: Fina Research, S.A.Inventors: Jean-Pierre Dath, Luc Delorme, Jacques-Fran.cedilla.ois Grootjans, Xavier Vanhaeren, Walter Vermeiren
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Patent number: 6136291Abstract: 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: GrantFiled: October 8, 1998Date of Patent: October 24, 2000Assignee: Mobile Oil CorporationInventors: Arthur W. Chester, C. Patricia Clement, Scott Han
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Patent number: 6124228Abstract: 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: GrantFiled: June 4, 1998Date of Patent: September 26, 2000Assignee: Phillips Petroleum CompanyInventors: An-hsiang Wu, Charles A. Drake
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Patent number: 6114267Abstract: 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: GrantFiled: May 18, 1998Date of Patent: September 5, 2000Inventors: Sobhan Ghosh, Satish Makhija, Mohan Prabhu Kuvettu, Ventachalam Krishnan, Sanjay Kumar Ray, Manoranjan Santra, Ram Mohan Thakur, Jagdev Kumar Dixit
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Patent number: 6087514Abstract: 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: GrantFiled: October 20, 1998Date of Patent: July 11, 2000Assignee: Engelhard CorporationInventors: Appadurai Thangaraj, Steven M. Kuznicki, Gerald S. Koermer
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Patent number: 6071844Abstract: 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: GrantFiled: November 14, 1997Date of Patent: June 6, 2000Assignee: Degussa-Huls AktiengesellschaftInventors: Wolfgang Hoelderich, Joerg Roeseller, Dietrich Arntz
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Patent number: 6054113Abstract: 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: GrantFiled: March 17, 1998Date of Patent: April 25, 2000Assignee: Exxon Research and Engineering Co.Inventors: David E. W. Vaughan, Karl G. Strohmaier, Gary B. McVicker, Owen C. Feeley
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Patent number: 6051521Abstract: 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: GrantFiled: August 25, 1998Date of Patent: April 18, 2000Assignee: Mobil Oil CorporationInventors: Jane C. Cheng, Hye Kyung C. Timken
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Patent number: 6043178Abstract: 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: GrantFiled: November 9, 1995Date of Patent: March 28, 2000Inventors: Zaigui Ge, Minghua Guan, Yongkang Hu, Lianhui Ding
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Patent number: 6036846Abstract: 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: GrantFiled: June 24, 1998Date of Patent: March 14, 2000Assignee: Institut Francais du PetroleInventors: Eric Benazzi, Nathalie George-Marchal, Christophe Gueret, Patrick Briot, Alain Billon, Pierre Marion