Mel; E.g., Zsm-11 Patents (Class 423/DIG29)
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Patent number: 6054112Abstract: Titanium-containing molecular sieves are prepared by adding an aqueous template solution to a mixture of tetraalkyl orthosilicate and tetraalkyl orthotitanate, crystallizing the reaction mixture in an autoclave and separating the solid obtained optionally, the solid is washed and calcined. The titanium-containing molecular sieves can be used as catalysts, inter alia in the epoxidation of olefins.Type: GrantFiled: October 24, 1997Date of Patent: April 25, 2000Assignee: Degussa-Huls AGInventors: Steffen Hasenzahl, Georg Thiele
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Patent number: 6046128Abstract: A method of manufacturing a catalyst for purifying exhaust gas, the catalyst including a pentasil-type crystalline aluminosilicate catalyst carrier carrying thereon a copper component and a phosphorus component. The method is characterized by adding the catalyst carrier into a solution containing a copper component and a phosphorus component, or a buffer and having a predetermined pH adjusted with ammonia, and subsequently adding an acid to the solution so as to adjust the pH of the solution to 7.0 or less, to thereby incorporate the copper component and the phosphorus component into the catalyst carrier. According to the present invention, a catalyst for removing exhaust gases which is durable and which has a high NO.sub.X removal factor can be prepared in a stable manner.Type: GrantFiled: July 27, 1998Date of Patent: April 4, 2000Assignee: Idemitsu Kosan Co., Ltd.Inventors: Tadashi Kisen, Yoshimi Kawashima
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Patent number: 6042807Abstract: Zeolites containing silicon, titanium and tellurium oxides are prepared by a hydrothermal method which yields materials containing exceptionally high levels of catalytically active Ti species. Following calcination, the molecular sieves are active and selective catalysts for the epoxidation of olefins using hydrogen peroxide or organic hydroperoxide. The zeolites may have framework structures of varying topology, including MFI, MEL, BEA, ZSM-48, MTW or MCM-41.Type: GrantFiled: April 2, 1997Date of Patent: March 28, 2000Assignee: Arco Chemical Technology, L.P.Inventor: Mahmoud K. Faraj
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Patent number: 6022519Abstract: A method of manufacturing crystalline microporous material suitable for manufacturing a variety of crystalline microporous material under mild reaction conditions and under safe working environmental conditions by using simple installation. The crystalline microporous materials obtained by the present invention may be used as adsorbent agent, catalyst or separating material. According to the characterizing features of the manufacturing method of the present invention, there are provided a method of using cation compound or amine as crystallizing modifier and using, in combination, raw material including canemite or silicon dioxide and a further method using raw material including silicon dioxide and aluminum salt. The method includes a step of mixing these components, a solid-liquid separating step for separating produced fine particles, and a crystallizing step for crystallizing the separated solid component.Type: GrantFiled: May 28, 1999Date of Patent: February 8, 2000Assignees: Kuboto Corporation, Japan as represented by Director General of Agency of Industrial Science and TechnologyInventors: Shinichi Shimizu, Fujio Mizukami, Yoshimichi Kiyozumi
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Patent number: 5977009Abstract: Useful catalyst compositions are produced by treating substituted molecular sieves with reactive titanium compounds such as titanium tetrahalides, preferably in the vapor phase at elevated temperatures. The molecular sieve starting materials contain tellurium, boron or germanium oxides in addition to silicon and titanium oxides. Olefins are efficiently transformed to epoxides using these catalyst compositions and an oxidizing agent such as hydrogen peroxide or an organic hydroperoxide.Type: GrantFiled: April 2, 1997Date of Patent: November 2, 1999Assignee: Arco Chemical Technology, LPInventor: Mahmoud K. Faraj
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Patent number: 5968474Abstract: Titanium-containing zeolites containing the MEL crystal structure are prepared using an organic templating agent comprising 3,5-dimethylpiperidinium compounds. The zeolites can be made in the pure phase form, and are useful as catalysts for the oxidation of hydrocarbons.Type: GrantFiled: February 11, 1997Date of Patent: October 19, 1999Assignee: Chevron U.S.A. Inc.Inventors: Yumi Nakagawa, Chris Dartt
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Patent number: 5958366Abstract: Large crystal zeolites are prepared by heating a zeolite synthesis mixture under agitation to a temperature equal to or less than the effective nucleation temperature of the zeolite synthesis mixture and thereafter the zeolite synthesis mixture is heated without agitation to a temperature equal to or greater than the effective nucleation temperature of the zeolite synthesis mixture.Type: GrantFiled: October 17, 1997Date of Patent: September 28, 1999Assignee: Exxon Chemical Patents Inc.Inventors: Robert Scott Smith, Johannes Petrus Verduijn, deceased, Jannetje Maatje van den Berge, executrix, Thomas H. Colle, Gary David Mohr, Gotz Burgfels, Josef Schonlinner
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Patent number: 5919430Abstract: Microporous and mesoporous metal silicates are prepared by the hydrothermal reaction of a silicon and metal source in the presence of a template. The choice of raw materials influences the purity and hence the catalytic activity of the products. A pyrogenic mixed oxide is used as the silicon and metal source. Prepared products have the composition (SiO.sub.2).sub.1-x (A.sub.m O.sub.n).sub.x, where A is Ti, Al, B, V or Zr and x is 0.005 to 0.1. Shaped objects of the microporous and mesoporous metal silicates are obtained directly by using a shaped object of the pyrogenic mixed oxide. The products obtained are used as oxidation catalysts.Type: GrantFiled: June 19, 1997Date of Patent: July 6, 1999Assignee: Degussa AktiengesellschaftInventors: Steffen Hasenzahl, Helmut Mangold, Eckehart Roland, Mario Scholz, Georg Thiele
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Patent number: 5869021Abstract: A rare earth-containing zeolite with a cocrystalline structure of ZSM-5 and ZSM-11, wherein the weight ratio of the moiety having the crystalline structure of ZSM-5 to the moiety having the crystalline structure of ZSM-11 is 0.1 to 10, which has, in the sodium form, the X-ray diffraction pattern set forth in Table 1, and in its originally synthesized anhydrous state, a chemical formula in terms of mole ratios of oxides as follows: 0.1-1.0 Na.sub.2 O.0.01-1.0 RE.sub.2 O.sub.3.Al.sub.2 O.sub.3.20-300 SiO.sub.2. Said zeolite has good acid hydrothermal stability and resistance against impurity contamination, and is useful as catalyst in various hydrocarbon conversions.Type: GrantFiled: December 19, 1995Date of Patent: February 9, 1999Assignees: China Petro-Chemical Corporation, Dalian Institute of Chemical Physics, Chineses Academy of Sciences, Fushun Petrochemical Company of SinopecInventors: Oingxia Wang, Shurong Zhang, Guangyu Cai, Feng Li, Longya Xu, Zuxian Huang, Yuying Li
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Patent number: 5656252Abstract: The subject of the present invention is a process for the preparation of zeolites in which some of the silicon atoms are replaced by titanium atoms, by hydrothermal reaction of a silicon source with titanium tetrafluoride in the presence of a structuring agent.Type: GrantFiled: January 30, 1995Date of Patent: August 12, 1997Assignee: Elf Aquitaine ProductionInventors: Alain Tuel, Remy Teissier
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Patent number: 5645812Abstract: The present invention relates to a process for preparing the zeolite ZSM-11 using 3,5-dimethylpiperidinium compounds as an organic templating agent, and to the zeolite ZSM-11 in the pure phase form.Type: GrantFiled: September 30, 1994Date of Patent: July 8, 1997Assignee: Chevron U.S.A. Inc.Inventor: Yumi Nakagawa
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Patent number: 5525323Abstract: Abstract of the Disclosure: Pentasil zeolites agglomerated in the form of hollow spheres and having a particle size of from 5 to 200 micron are prepared by treating a mixture of an aqueous alkylenediamine, alkylenetriamine and/or alkylenetetramine, silica and an aluminum, boron and/or titanium salt at from 20.degree. to 100.degree. C., then crystallizing the product at from 110.degree. to 200.degree. C. and from 0.01 to 50 bar and calcining it at from 400.degree. to 650.degree. C., and said zeolites are used as catalysts and/or adsorbents.Type: GrantFiled: June 30, 1994Date of Patent: June 11, 1996Assignee: BASF AktiengesellschaftInventors: Ulrich Mueller, Axel Reich, Klaus Unger
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Patent number: 5242676Abstract: A process for the selective surface dealumination of a zeolite having a Constraint Index greater than 1 by contacting the zeolite with dicarboxylic acid, such as oxalic acid.Type: GrantFiled: May 11, 1992Date of Patent: September 7, 1993Assignee: Mobil Oil Corp.Inventors: Minas R. Apelian, Anthony S. Fung