Isomorphic Metal Substitution Patents (Class 423/713)
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Patent number: 7083776Abstract: The present invention relates to new molecular sieve SSZ-71 prepared using a N-benzyl-1,4-diazabicyclo[2.2.2]octane cation as a structure-directing agent, methods for synthesizing SSZ-71 and processes employing SSZ-71 in a catalyst.Type: GrantFiled: November 2, 2005Date of Patent: August 1, 2006Assignee: Chevron U.S.A. Inc.Inventors: Cong-Yan Chen, Allen W. Burton, Jr., Ann J. Liang
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Patent number: 7056490Abstract: The invention concerns a IM-11 crystalline solid with structure type LTA, with a neutral framework, having a chemical composition expressed as the anhydrous base in terms of moles of oxide defined by the general formula XO2:mYO2:qR:sF, in which R represents one or more nitrogen-containing organic compounds, X represents one or more tetravalent elements other than germanium, Y represents germanium, F is fluorine, m, q, s represent the number of moles of YO2, R and F respectively, m is in the range 0.1 to 4, and q and s are in the range 0 to 1.Type: GrantFiled: July 30, 2004Date of Patent: June 6, 2006Assignee: Institut Francais du PetroleInventors: Bogdan Harbuzaru, Jean-Louis Paillaud, Joël Patarin, Nicolas Bats, Laurent Simon, Catherine Laroche
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Patent number: 7041274Abstract: A metalloaluminosilicate composition includes an aluminosilicate composition having an aluminosilicate framework and containing at least one metal, wherein a substantial portion of the metal is incorporated into the aluminosilicate framework. A higher concentration of the metal is incorporated into the framework of the catalyst than is present at the surface of the catalyst.Type: GrantFiled: August 4, 2003Date of Patent: May 9, 2006Assignee: Intevep, S.A.Inventors: Gerardo Vitale-Rojas, Andres Miguel Quesada-Perez
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Patent number: 7029650Abstract: This invention relates to a process for making a germanium-zeolite. The zeolite is preferably a MFI-type structure, most preferably a ZSM-5 MFI zeolite. The germanium-zeolite is synthesized from an aqueous gel containing a silica source, a germanium source, an aluminum source and a structure directing agent in the presence of an acid to control the pH of the gel in the range of 6.5 to 13.5, preferably 7.5 to 11, to maximize the amount of germanium incorporated into the zeolite framework. Optionally, a sodium compound may be introduced into the reaction mixture gel either before or after the addition of the acid, preferably before.Type: GrantFiled: December 27, 2004Date of Patent: April 18, 2006Assignee: Saudi Basic Industries CorporationInventors: Gopalakrishnan G. Juttu, Alla Konstantin Khanmamedova, Scott F. Mitchell
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Patent number: 7025948Abstract: The invention concerns a crystalline solid, designated ITQ-31, which has the X ray diffraction diagram given below. Said solid has a chemical composition, expressed as the anhydrous base in terms of moles of oxide, defined by the general formula XO2: mYO2:pZ2O3:qR:sF, in which R represents an organic nitrogen-containing template, X represents one or more tetravalent elements other than germanium, Y represents germanium, Z represents at least one trivalent element and F is fluorine.Type: GrantFiled: April 11, 2005Date of Patent: April 11, 2006Assignee: Institut Francais du PetroleInventors: Eva Barea, Vicente Fornes, Avelino Corma, Patrick Bourges, Emmanuelle Guillon
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Patent number: 7008610Abstract: A crystalline material is described that has an AEI framework type, wherein the material, in its calcined, anhydrous form, has a composition involving the molar relationship: (n)X2O3:YO2, wherein X is a trivalent element, Y is a tetravalent element n is from 0 to less than 0.01. The material is normally synthesized in a halide, typically a fluoride, medium and exhibits activity and selectivity in the conversion of methanol to lower olefins, especially ethylene and propylene.Type: GrantFiled: December 20, 2004Date of Patent: March 7, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Guang Cao, Karl G. Strohmaier, Hailian Li, Anil S. Guram, Robert J. Saxton, Mark T. Muraoka, Jeffrey C. Yoder, Karin Yaccato
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Patent number: 6991774Abstract: The present invention discloses a high stability rare earth zeolite Y with high rare earth and the preparation process thereof, which zeolite has a content of rare earth of 4–15 wt %, a unit cell constant of 2.450–2.458 nm, a differential thermal collapsed temperature of 1000–1056° C., a silica to alumina ratio of 8.3–8.8, and a content of sodium oxide less than 1.0 wt %. Said zeolite is prepared by drying a rare earth-containing zeolite Y, introducing gaseous silicon tetrachloride carried by dry air and reacting at a temperature of 150–600° C. for 10 min to 6 h, then purging with dry air and washing with de-cationized water to remove the soluble by-products. The rare earth zeolite Y possesses high activity and selectivity for cracking the heavy oils, high activity for hydrogen transfer, has good coke selectivity, can effectively increase the yield of light oils, and improve the quality of gasoline and thus can directly serve as an active component for preparing various hydrocarbon cracking catalysts.Type: GrantFiled: March 30, 2004Date of Patent: January 31, 2006Assignees: China Petroleum & Chemical Corporation, Research Institute of Petroleum ProcessingInventors: Jun Du, Zheng Li, Zhijian Da, Mingyuan He
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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: 6956006Abstract: The invention relates to a composite material comprising silicon and titanium dioxide characterized by an enhanced thermal and hydrothermal stability of the pore structure. The composite is obtainable by precipitating titanium hydroxide from an aqueous solution containing sulfate salts and urea, followed by an hydrothermal treatment in the mother liquor, and by reacting the precipitate with a basic silica sol. The composite has a specific surface area of up to 228 m2/g for a material calcined at 800° C. for 3 hours, and is suitable for catalyzing a variety of reactions, including Claus reaction and degradation of organic impurities.Type: GrantFiled: February 24, 1998Date of Patent: October 18, 2005Assignee: Rotem Amfert Negev Ltd.Inventors: Yaacov W. Mirsky, Marina N Gorlova
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Patent number: 6890511Abstract: An aluminosilicate zeolite and substituted versions designated UZM-15 have been synthesized. These zeolites are prepared using an organoammonium cation as a template in which at least one organic group has at least 2 carbon atoms. An example of such a cation is diethyldimethylammonium cation. The template can optionally comprise other organoammonium cations, alkali metals and alkaline earth metals. These UZM-15 materials can be dealuminated by various processes to provide UZM-15HS compositions. Both the UZM-15 and UZM-15HS compositions are useful as catalysts or catalyst supports in various process such as the conversion of cyclic hydrocarbons to non-cyclic hydrocarbons and olefin oligomerization.Type: GrantFiled: March 21, 2003Date of Patent: May 10, 2005Assignee: UOP LLCInventors: Lisa M. Rohde, Gregory J. Lewis, Stephen T. Wilson, Deng-Yang Jan, R. Lyle Patton, Susan C. Koster, Jaime G. Moscoso, Mark A. Miller, Michael G. Gatter
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Patent number: 6849248Abstract: A porous crystalline material (ITQ-21) which in its calcined form has the chemical composition X2O3:nYO2:mZO2 wherein (n+m) is at least 5, X is a trivalent element, Z is Ge, Y is at least one tetravalent element other than Ge, and the ratio is m/(n+m) is 0.0 to 0.5, and displays the X-ray diffraction values given in Table 1, and a method of preparation of the material in the presence of fluoride ions and using N(16)-methylsparteinium as structure director agent; the material being useful in its acid form and in bifunctional catalyst form in processes of catalytic cracking, hydro-cracking and alkylation of aromatics.Type: GrantFiled: November 14, 2003Date of Patent: February 1, 2005Assignees: Consejo Superior de Investigaciones Cientificas, Universidad Politecnica de ValenciaInventors: Avelino Corma Canós, Fernando Rey García, María José Díaz Cabañas
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Patent number: 6843978Abstract: The present invention refers to a microporous material formed by oxygen, silicon, germanium, aluminum, boron, gallium, zirconium and/or titanium in its composition, called TIQ-6, to its catalytic applications in oxidation reactions, and to a method of the TIQ-6 material's preparation based on the synthesis of a gel with a titanium and/or zirconium content, its hydrothermal treatment under controlled conditions, and the treatment of the resulting laminar material with a solution of an organic compound containing a proton accepting group. This swollen material is subjected to a specific treatment to obtain a high external area delaminated solid. A material, METIQ-6, similar to the TIQ-6 material, but also having organic groups anchored on its surface incorporated by a post-synthesis process onto the TIQ-6 material is also claimed.Type: GrantFiled: May 24, 2002Date of Patent: January 18, 2005Assignees: Consejo Superior De Investigaciones Cientificas, Universidad Politecnica De ValenciaInventors: Avelino Corma Canós, Vicente Fornes Segui, Urbano Díaz Morales, Marcelo Eduardo Domine
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Patent number: 6841144Abstract: The present invention concerns a method for the production of a titanium-containing zeolite whereby a synthesis gel is formed by combining and hydrolysing a hydrolysable silicon compound, a hydrolysable titanium compound and a basic quaternary ammonium compound in an aqueous medium, in quantities such that relative to the starting compounds the molar ratio of Si/Ti is greater than or equal to 30 and that of N/Si is 0.12 to less than 0.20, and the synthesis gel is then crystallised at a temperature of 150 ° C. to 220 ° C. for a period of less than 3 days, and a titanium-containing zeolite obtainable by this method.Type: GrantFiled: February 24, 2001Date of Patent: January 11, 2005Assignee: Degussa AGInventors: Steffon Hasenzahl, Klaus Heyne, Dieter Kneitel
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Patent number: 6790433Abstract: The invention, in one embodiment, is a method for preparing crystalline zeolites by (a) contacting a calcined essentially aluminum free borosilicate zeolite with an aqueous acid solution, thereby producing an at least partially deboronated zeolite; (b) contacting said at least partially deboronated zeolite with a solution selected from the group consisting of an aqueous aluminum salt solution, thereby producing an aluminosilicate zeolite; an aqueous gallium salt solution, thereby producing a gallosilicate zeolite; an aqueous iron salt solution, thereby producing a ferrosilicate zeolite; and mixtures thereof; and (c) where the contacting in step (b) occurs at a pH of not greater than about 3.5.Type: GrantFiled: October 18, 2002Date of Patent: September 14, 2004Assignee: Chevron U.S.A. Inc.Inventors: Cong-Yan Chen, Stacey I. Zones
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Patent number: 6787124Abstract: A new synthetic porous crystalline material, designated EMM-1, is disclosed having, in its calcined form, the X-ray diffraction pattern of Table 2 above. Also disclosed are methods of making EMM-1 in the presence of HF using various organic nitrogen compounds as directing agents. Aluminum-containing EMM-1 can be produced either by inclusion of Al in the synthesis, or by incorporation of B or Ga in the synthesis, followed by post treatment with aluminum nitrate or other sources of Al. EMM-1 is useful as an acid catalyst and as an adsorbent.Type: GrantFiled: February 14, 2003Date of Patent: September 7, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Arthur W. Chester, Sandeep S. Dhingra, Stephen G. Casmer
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Patent number: 6787123Abstract: The present invention discloses a high stability rare earth zeolite Y with high rare earth and the preparation process thereof, which zeolite has a content of rare earth of 4-15 wt %, a unit cell constant of 2.450-2.458 nm, a differential thermal collapsed temperature of 1000-1056° C., a silica to alumina ratio of 8.3-8.8, and a content of sodium oxide less than 1.0 wt %. Said zeolite is prepared by drying a rare earth-containing zeolite Y, introducing gaseous silicon tetrachloride carried by dry air and reacting at a temperature of 150-600° C. for 10 min to 6 h, then purging with dry air and washing with de-cationized water to remove the soluble by-products. The rare earth zeolite Y possesses high activity and selectivity for cracking the heavy oils, high activity for hydrogen transfer, has good coke selectivity, can effectively increase the yield of light oils, and improve the quality of gasoline and thus can directly serve as an active component for preparing various hydrocarbon cracking catalysts.Type: GrantFiled: April 26, 2002Date of Patent: September 7, 2004Assignees: China Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, SinopecInventors: Jun Du, Zheng Li, Zhijian Da, Mingyuan He
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Publication number: 20040167370Abstract: 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.Type: ApplicationFiled: September 20, 2002Publication date: August 26, 2004Inventors: Deng-Yang Jan, Jaime G. Moscoso, Gregory J. Lewis, Michael G. Gatter, Beckay J. Mezza, Susan C. Koster
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Patent number: 6776975Abstract: Applicants have synthesized a new crystalline aluminosilicate zeolite identified as UZM-4M. This new zeolite is obtained by treating a UZM-4 zeolite with a fluorosilicate salt to obtain a zeolite having the empirical formula: M1an+Al1-xExSiyOz where M1 is an alkali metal, alkaline earth metal, rare earth metal, hydronium ion or ammonium ion, E can be gallium, iron, boron, indium and mixtures thereof and has a Si/Al ratio of 1.5 to about 10.Type: GrantFiled: May 9, 2002Date of Patent: August 17, 2004Assignee: UOP LLCInventors: Ben A. Wilson, Gregory J. Lewis, Deng-Yang Jan, Stephen T. Wilson, R. Lyle Patton
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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: 6761875Abstract: Rare earth silicate octahedral/tetrahedral molecular sieves with the octahedral chains as rare earth centers exhibit enhanced thermal and hydrothermal stability.Type: GrantFiled: September 5, 2001Date of Patent: July 13, 2004Assignee: Engelhard CorporationInventors: Steven M. Kuznicki, Richard M. Jacubinas
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Publication number: 20040120873Abstract: The present invention is directed to a metal-promoted zeolite beta catalyst useful in the selective catalytic reduction of nitrogen oxides with ammonia in which the zeolite beta is pre-treated so as to provide the zeolite with improved hydrothermal stability.Type: ApplicationFiled: December 9, 2003Publication date: June 24, 2004Inventors: Pascaline H. Tran, Xinsheng Liu, James M. Chen, Gerard D. Lapadula, Howard Furbeck
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Patent number: 6752980Abstract: An aluminosilicate zeolite and substituted version designated UZM-16 have been synthesized. These zeolites are prepared using benzyltrimethyl-ammonium (BzTMA) cation or a combination of BzTMA and at least one other quaternary ammonium cation These zeolites have a structure that is related to offretite, but shows structurally different and distinct features. The UZM-16 zeolites can be dealuminated to form UZM-16HS zeolites which have different acidity, porosity and ion-exchange properties. Both UZM-16 and UZM-16HS are useful in various hydrocarbon conversion processes.Type: GrantFiled: March 21, 2003Date of Patent: June 22, 2004Assignee: UOP LLCInventors: Jaime G. Moscoso, Wharton Sinkler, Gregory J. Lewis, Deng-Yang Jan, Susan C. Koster
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Publication number: 20040091420Abstract: Process for the preparation of doped pentasil-type zeolite, which process comprises the steps of:Type: ApplicationFiled: August 25, 2003Publication date: May 13, 2004Inventor: Rajeev S. Rao
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Publication number: 20040028605Abstract: A metalloaluminosilicate composition includes an aluminosilicate composition having an aluminosilicate framework and containing at least one metal, wherein a substantial portion of the metal is incorporated into the aluminosilicate framework. A higher concentration of the metal is incorporated into the framework of the catalyst than is present at the surface of the catalyst.Type: ApplicationFiled: August 4, 2003Publication date: February 12, 2004Inventors: Gerardo Vitale-Rojas, Andres Miquel Quesada-Perez
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Publication number: 20030232007Abstract: Zeolites having the IFR structure and containing aluminum in their crystal structure can be made by preparing a reaction mixture comprising a zeolite which is an active source of aluminum oxide, an active source of alkali metal oxide, an active source of an oxide of a tetravalent element, an organic template selected from the group consisting of a 1-benzyl-4-aza-1-azonia-bicyclo[2.2.2]octane cation and a N-benzyl quinuclidinium cation, and maintaining the reaction mixture under conditions sufficient to form crystals of the zeolite.Type: ApplicationFiled: June 12, 2002Publication date: December 18, 2003Inventors: Saleh Elomari, Stacey Zones
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Patent number: 6653396Abstract: Zeolites of type A wherein all the cationic sites of which occupied by sodium, calcium and/or magnesium, potassium and hydronium cations, which exhibit the advantage of having a water adsorption capacity≧23%, which do not adsorb and therefore cannot desorb nitrogen, and which, incorporated in polyurethane (PU) resins, make it possible to increase the potlife of the PU formulations in which they are incorporated. Such zeolites are prepared by a process comprising bringing into contact an aqueous suspension of zeolite 3A, 4A or 5A, an aqueous solution of calcium or potassium salt(s) or solutions of calcium and potassium salt(s), and an acid solution, simultaneously or otherwise and in any order; and in then filtering off and washing the solid obtained, and then drying and activating the zeolite.Type: GrantFiled: January 11, 2002Date of Patent: November 25, 2003Assignee: CECA S.A.Inventors: Serge Nicolas, Paul-Guillaume Schmitt
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Publication number: 20030211034Abstract: Applicants have synthesized a new crystalline aluminosilicate zeolite identified as UZM-4M.Type: ApplicationFiled: May 9, 2002Publication date: November 13, 2003Inventors: Ben A. Wilson, Gregory J. Lewis, Jan Deng-Yang, Stephen T. Wilson, R. Lyle Patton
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Patent number: 6645899Abstract: The present invention relates to a method for the removal of the templating agent from synthetic zeolites in general and in particular from silicalite, titanium silicalite and from composite materials containing zeolites and for their activation as catalysts. The method consists in treating the above materials with solvents in vapor phase and at a low temperature.Type: GrantFiled: November 15, 2000Date of Patent: November 11, 2003Assignee: Enichem S.p.A.Inventors: Stefano Palmery, Fausto Genoni, Guido Spano′, Leonardo Dalloro, Alberto Cesana, Roberto Buzzoni
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Patent number: 6635233Abstract: A CFI-type zeolite where the atomic ratio of silicon to the heteroatom is 45 or less and the long axes of the crystals are 0.7 &mgr;m or less is useful as a catalyst for conversion reaction of aromatic compounds because the zeolite has a number of active sites and small crystals.Type: GrantFiled: March 20, 2001Date of Patent: October 21, 2003Assignee: Toray Industries, Inc.Inventors: Hajime Kato, Masahito Yoshikawa, Kazuyoshi Iwayama, Shinichi Sakaguchi, Naoyuki Uchiyama
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Patent number: 6632416Abstract: The present invention relates to a new crystalline zeolite SSZ-53 prepared by using phenylcycloalkylmethyl ammonium cations as structure directing agents.Type: GrantFiled: April 17, 2001Date of Patent: October 14, 2003Assignee: Chevron U.S.A. Inc.Inventor: Saleh Elomari
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Patent number: 6627175Abstract: Process for the manufacture of crystalline solids comprising at least one element chosen from Groups IIIa, IVa and Va and at least one transition metal, according to which at least one source of oxide of the element from Groups IIIa, IVa and Va and at least one transition metal oxide source, which was dissolved beforehand in an alcohol having a pKa below that of water, are hydrolysed in an aqueous medium comprising a mineralizing agent and the gel thus obtained is crystallized in the presence of a structuring agent.Type: GrantFiled: February 20, 2001Date of Patent: September 30, 2003Assignee: Solvay (Societe Anonyme)Inventor: Jean-Paul Schoebrechts
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Patent number: 6620401Abstract: The present invention relates to new crystalline zeolite SSZ-60 prepared using a N-ethyl-N-(3,3,5-trimethylcyclohexyl)pyrrolidinium cation or N-ethyl-N-(2,4,4-trimethylcyclopentyl)pyrrolidinium templating agent, and processes employing SSZ-60 as a catalyst.Type: GrantFiled: July 13, 2001Date of Patent: September 16, 2003Assignee: Chevron U.S.A. Inc.Inventor: Saleh Elomari
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Publication number: 20030152510Abstract: The present invention is directed towards methods for the cost-effective commercial manufacture of small crystal titanium-silicate molecular sieve products, toward a novel titano-silicate molecular sieve composition synthesized thereby, which the present inventors have termed “TS-PQ”, and toward uses of that molecular sieve composition as an oxidation catalyst.Type: ApplicationFiled: November 15, 2002Publication date: August 14, 2003Inventors: Ernest Senderov, Richard J. Hinchey, Istvan Halasz
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Patent number: 6605267Abstract: The present invention relates to new crystalline zeolite SSZ-50 prepared using a quaternary ammonium cation templating agent having the structure where X- is an anion which is not detrimental to the formation of the SSZ-50. SSZ-50 is useful in catalysts for hydrocarbon conversion reactions.Type: GrantFiled: November 13, 2000Date of Patent: August 12, 2003Assignee: Chevron U.S.A. Inc.Inventors: Gregory S. Lee, Stacey I. Zones
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Publication number: 20030133870Abstract: The invention, in one embodiment, is a method for preparing crystalline zeolites by (a) contacting a calcined essentially aluminum free borosilicate zeolite with an aqueous acid solution, thereby producing an at least partially deboronated zeolite; (b) contacting said at least partially deboronated zeolite with a solution selected from the group consisting of an aqueous aluminum salt solution, thereby producing an aluminosilicate zeolite; an aqueous gallium salt solution, thereby producing a gallosilicate zeolite; an aqueous iron salt solution, thereby producing a ferrosilicate zeolite; and mixtures thereof; and (c) where the contacting in step (b) occurs at a pH of not greater than about 3.5.Type: ApplicationFiled: October 18, 2002Publication date: July 17, 2003Inventors: Cong-Yan Chen, Stacey I. Zones
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Publication number: 20030103894Abstract: The present invention concerns a method for the production of a titanium-containing zeolite whereby a synthesis gel is formed by combining and hydrolysing a hydrolysable silicon compound, a hydrolysable titanium compound and a basic quaternary ammonium compound in an aqueous medium, in quantities such that relative to the starting compounds the molar ratio of Si/Ti is greater than or equal to 30 and that of N/Si is 0.12 to less than 0.20, and the synthesis gel is then crystallised at a temperature of 150° C. to 220 ° C. for a period of less than 3 days, and a titanium-containing zeolite obtainable by this method.Type: ApplicationFiled: September 3, 2002Publication date: June 5, 2003Inventors: Steffon Hasenzahl, Klaus Heyne, Dieter Kneitel
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Patent number: 6572838Abstract: The present invention relates to the manufacture of novel molecular sieve adsorbents for the separation of a gaseous mixture of oxygen, nitrogen and argon. The adsorbent is useful for the separation of oxygen and/or nitrogen from air. More specifically, the invention relates to the manufacture of a molecular sieve adsorbent, which is selective towards nitrogen from its gaseous mixture with oxygen and/or argon and argon from its gaseous mixture with oxygen.Type: GrantFiled: March 25, 2002Date of Patent: June 3, 2003Assignee: Council of Scientific and Industrial ResearchInventors: Jince Sebastian, Raksh Vir Jasra
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Patent number: 6573131Abstract: Thin films for use as dielectric in semiconductor and other devices are prepared from silica zeolites, preferably pure silica zeolites such as pure-silica MFI. The films have low k values, generally below about 2.7, ranging downwards to k values below 2.2. The films have relatively uniform pore distribution, good mechanical strength and adhesion, are relatively little affected by moisture, and are thermally stable. The films may be produced from a starting zeolite synthesis or precursor composition containing a silica source and an organic zeolite structure-directing agent such as a quaternary ammonium hydroxide. In one process the films are produced from the synthesis composition by in-situ crystallization on a substrate. In another process, the films are produced by spin-coating, either through production of a suspension of zeolite crystals followed by redispersion or by using an excess of the alkanol produced in preparing the synthesis composition.Type: GrantFiled: July 6, 2001Date of Patent: June 3, 2003Assignee: The Regents of The University of CaliforniaInventors: Yushan Yan, Huanting Wang, Zhengbao Wang
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Patent number: 6569401Abstract: The present invention relates to new crystalline molecular sieve SSZ-64 prepared using a N-cyclobutylmethyl-N-ethylhexamethyleneiminium cation or N-cyclobutylmethyl-N-ethylheptamethyleneiminium cation structure directing agent, and methods for synthesizing SSZ-64.Type: GrantFiled: August 1, 2002Date of Patent: May 27, 2003Assignee: Chevron U.S.A. Inc.Inventor: Saleh Elomari
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Patent number: 6565826Abstract: Method of preparing zeolite single crystals comprising the step of: applying a synthesis gel with zeolite precursor composition within pore system and on surface of a particulate matrix material having a predetermined pore structure and particle size; subjecting the precursor composition to crystallising conditions; and isolating porous single crystals of the zeolite by removing the matrix material.Type: GrantFiled: December 5, 2000Date of Patent: May 20, 2003Assignee: Haldor Topsoe A/SInventors: Claus J. H. Jacobsen, Jindrich Houzvicka, Iver Schmidt, Claus Madsen, Anna Carlsson
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Patent number: 6555089Abstract: The present invention relates to new crystalline zeolite SSZ-58 prepared using a N-butyl-N-cyclooctylpyrrolidinium cation or N-propyl-N-cyclooctylpyrrolidinium cation templating agent, and processes employing SSZ-58 as a catalyst.Type: GrantFiled: July 13, 2001Date of Patent: April 29, 2003Assignee: Chevron U.S.A. Inc.Inventor: Saleh Elomari
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Publication number: 20030068270Abstract: ETS-4 crystalline titanium silicate is produced so as to be enriched in at least one polymorph thereof which contains channels which interpenetrate the crystal lattice in both the b- and c-directions. A process of producing such a polymorph and enriched ETS-4 titanium silicate comprises the addition of a wetting agent to the reaction mixture.Type: ApplicationFiled: September 4, 2002Publication date: April 10, 2003Inventors: Steven M. Kuznicki, Richard M. Jacubinas, Tadeuz W. Langner
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Patent number: 6544495Abstract: The present invention relates to a new crystalline zeolite SSZ-57. The present invention also relates to crystalline zeolites prepared by using N-butyl-N-cyclohexylpyrrolidinium cation, N-propyl-N-cycloheptylpyrrolidinium cation or N-butyl-N-cyclooctylpyrrolidinium cation as structure directing agents.Type: GrantFiled: July 13, 2001Date of Patent: April 8, 2003Assignee: Chevron U.S.A. Inc.Inventor: Saleh Elomari
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Publication number: 20030049200Abstract: Rare earth silicate octahedral/tetrahedral molecular sieves with the octahedral chains as rare earth centers exhibit enhanced thermal and hydrothermal stability.Type: ApplicationFiled: September 5, 2001Publication date: March 13, 2003Inventors: Steven M. Kuznicki, Richard M. Jacubinas
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Publication number: 20030045763Abstract: A zeolite catalyst is described corresponding to an acid form of ITQ-7 zeolite and/or all its possible intergrowths, its method of preparation and its application for the alkylation of aromatics with olefins, alcohols or polyalkylated aromatic compounds. It is considered that the catalyst and the application to which this present invention refers are particularly valuable for the production of cumene.Type: ApplicationFiled: July 1, 2002Publication date: March 6, 2003Inventors: Avelino Corma Canos, Maria Jose Diaz Cabanas, Vicente Martinez Soria, Veronica Piles Selma
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Patent number: 6524984Abstract: A process is described for the preparation of zeolitic catalysts in the form of microspheres, comprising zeolite and oligomeric silica, characterized by a high mechanical resistance. The process consists in subjecting to rapid drying the suspension, to which tetra-alkylorthosilicate is optionally added, resulting from the synthesis of zeolite by hydrothermal treatment at autogenous pressure of the reagent mixture containing tetra-alkylammoniumhydroxide as templating agent, and subjecting the product resulting from the drying to calcination.Type: GrantFiled: September 24, 1998Date of Patent: February 25, 2003Assignee: Enichem S.p.A.Inventors: Angela Carati, Giuseppe Bellussi, Maria Angela Mantegazza, Giudo Petrini
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Publication number: 20030035771Abstract: The present invention concerns a method for the production of a titanium-containing zeolite by: (a) combining a hydrolyzable silicon compound and a hydrolyzable titanium compound; (b) adding a basic quaternary ammonium compound in an aqueous medium to the mixture from (a) and hydrolysing the reaction mixture at a temperature in the range from 0° C. to 100° C. to form a synthesis sol; then (c) heating the synthesis sol to a temperature in the range from 150° C. to 190° C.; and (d) crystallizing the synthesis sol at this temperature, characterized in that the heating-up time in step (c) is less than 240 min.Type: ApplicationFiled: August 29, 2002Publication date: February 20, 2003Inventor: Steffen Hasenzahl
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Patent number: 6521206Abstract: The present invention relates to new crystalline, molecular sieve CIT-6 that has the topology of zeolite beta. CIT-6 can be in an all-silica form, in a form wherein zinc is in the crystal framework, or a form containing silicon oxide and non-silicon oxides. In a preferred embodiment, CIT-6 has a crystal size of less than one micron and a water adsorption capacity of less than 0.05 g/g.Type: GrantFiled: July 27, 2000Date of Patent: February 18, 2003Assignee: California Institute of TechnologyInventors: Mark E. Davis, Takahiko Takewaki
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Patent number: 6521207Abstract: A method for producing a molding of binderless zeolite by exposing to saturated steam a precursor having a tetraalkylammonium salt component, an alkali metal component, and a metal component incorporated in the crystal skeleton of zeolite supported on a molding using silica as a main component, the molding of binderless zeolite, and use of the molding as a catalyst for the production of an alkanolamine.Type: GrantFiled: October 11, 2001Date of Patent: February 18, 2003Assignee: Nippon Shokubai Co., Ltd.Inventors: Tomoharu Oku, Hideaki Tsuneki
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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