Patents Represented by Attorney, Agent or Law Firm Edward F. Sherer
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Patent number: 5753121Abstract: Inorganic composite membrane containing molecular sieve crystals, comprising a macroporous support to which molecular sieve crystals and modifications thereof have been applied substantially as a monolayer, said crystals and modifications thereof having been oriented so that, toa substantial extent, the pores of the sieve crystals form a significant included angle with the support surface, there being present between the crystals a gastight matrix, at least gastight to a degree sufficient under practical conditions.Type: GrantFiled: March 10, 1995Date of Patent: May 19, 1998Assignee: Exxon Chemical Patents Inc. (ECPI)Inventors: Eduard Rudolf Geus, Jacobus Cornelis Jansen, Blandikus Catharikus Jaspers, Johannes Schoonman, Herman van Bekkum
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Patent number: 5750820Abstract: A process for separating a product from a multicomponent feedstream to an adsorption apparatus or system. The apparatus or system may comprise a moving-bed or a simulated moving-bed adsorption means. The product comprises at least one organic compound, such as an aryl compound with alkyl substitutes. The conduits used to supply the feedstream to the apparatus or system are flushed with media of multiple grades. Amounts of the media are sufficient to fill the conduits. The process achieves improvements in the efficiency of adsorption separation, the capacity of adsorption apparatus and systems, and the purity of product attainable by adsorption process.Type: GrantFiled: January 11, 1996Date of Patent: May 12, 1998Inventor: Chiu N. Wei
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Patent number: 5744035Abstract: The present invention relates to a continuous gastight film of zeolites on a porous underlayer, a zeolite membrane obtainable by calcining the gastight zeolite film, and a module with such a gastight zeolite film, which module consists of a membrane housing and a supported membrane, the whole of membrane housing and supported membrane being composed of not more than two materials.Type: GrantFiled: January 31, 1995Date of Patent: April 28, 1998Assignee: Exxon Chemical Patents Inc.Inventors: Eduard Rudolf Geus, Wridzer Jan Willem Bakker, Jacob Adriaan Moulijn, Herman van Bekkum, Jacobus Cornelis Jansen
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Patent number: 5726112Abstract: A deactivated reforming catalyst comprising a type L zeolite containing a Group VIII noble metal may be regenerated and have enhanced dispersion by a method involving contacting the catalyst with oxygen and water at elevated temperatures, contacting the catalyst at elevated temperatures with a source of chlorine such as HCl or Cl.sub.2, and preferably oxygen and water, contacting the catalyst at elevated temperatures with oxygen and optionally water, and contacting the catalyst at elevated temperatures with hydrogen and optionally water to reduce the catalyst. Preferably the noble metal is platinum.Type: GrantFiled: June 6, 1995Date of Patent: March 10, 1998Assignee: Exxon Research & EngineeringInventors: Shun C. Fung, Samuel J. Tauster, Jay Y. Koo
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Patent number: 5723397Abstract: Molecular sieve layers on a support are deposited from a synthesis solution while increasing the solution temperature.Type: GrantFiled: February 12, 1996Date of Patent: March 3, 1998Assignee: Exxon Chemical Patents Inc.Inventor: Johannes Petrus Verduijn
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Patent number: 5712214Abstract: A low-pressure, high-temperature, wet post-treatment after oxyhalogenation during regeneration to improve activity and selectivity recovery of a regenerated catalyst involves exposing a halogenated catalyst to a gaseous stream including water having a partial pressure of up to about 1.5 psia, oxygen having a partial pressure of less than about 4.5 psia, and an inert gas at a temperature within the range of about 450.degree. C. to about 530.degree. C. at a pressure within the range of about 14.7 psia to about 65 psia for a time sufficient to effect a hydrogen halide partial pressure in offgas from the halogenated catalyst of less than about 0.004 psia to effectively remove excess halide from the halogenated catalyst.Type: GrantFiled: December 7, 1993Date of Patent: January 27, 1998Assignee: Exxon Research & Engineering CompanyInventors: Yao-Jyh Robert Huang, Shun Chong Fung
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Patent number: 5698486Abstract: A deactivated reforming catalyst comprising a type L zeolite containing a Group VIII noble metal may be regenerated and have enhanced dispersion by a method involving contacting the catalyst with oxygen and water at elevated temperatures, contacting the catalyst at elevated temperatures with a source of chlorine such as HCl or Cl.sub.2, and preferably oxygen and water, contacting the catalyst at elevated temperatures with oxygen and optionally water, and contacting the catalyst at elevated temperatures with hydrogen and optionally water to reduce the catalyst. Preferably the noble metal is platinum.Type: GrantFiled: June 6, 1995Date of Patent: December 16, 1997Assignee: Exxon Research & Engineering CompanyInventors: Shun C. Fung, Samuel J. Tauster, Jay Y. Koo
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Patent number: 5683673Abstract: In the manufacture of Beta zeolite, good yields result from a high ethene pressure, advantageously accompanied by synthesis gel ageing and low aluminium content.Type: GrantFiled: May 3, 1996Date of Patent: November 4, 1997Assignee: Exxon Chemical Patents Inc.Inventors: Philip Luc Buskens, Luc Roger Marc Martens, Georges Marie Karel Mathys
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Patent number: 5672331Abstract: MFI zeolite crystals of uniform and controllable size may be produced by mixing:(i) a source of particulate silica in which silica particles present have an average diameter of 1 .mu.m or less;(ii) seeds of an MFI zeolite having an average diameter of 100 nm or less in the form of a colloidal suspension;(iii) an organic structure directing agent; and(iv) a source of fluorine or an alkali metal;to form an aqueous synthesis mixture, the seeds being present in an amount of 0.05 to 1700 ppm by weight of the synthesis mixture, and the synthesis mixture having an alkalinity in terms of OH.sup.- /SiO.sub.2 molar ratio of less than 0.1, and allowing the synthesis mixture to crystallize.Type: GrantFiled: June 3, 1994Date of Patent: September 30, 1997Assignee: Exxon Chemical Patents Inc. (ECPI)Inventor: Johannes Petrus Verduijn
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Patent number: 5670130Abstract: Zeolite L containing caesium having enhanced catalytic properties is prepared by a process in which said zeolite L is crystallized from a synthesis mixture with a molar composition (expressed as oxides) of:______________________________________ K.sub.2 O/SiO.sub.2 0.22 to 0.30 K.sub.2 O/Cs.sub.2 O 5 to 12 H.sub.2 O/K.sub.2 O 50 to 90 and SiO.sub.2 /Al.sub.2 O.sub.3 6.0 to 7.0 ______________________________________and containing 0.5 to 20 ppm (by weight) of divalent metal cations, e.g. Mg ions. The zeolite L can form part of a dehydrocyclization and/or isomerisation catalyst.Type: GrantFiled: January 17, 1995Date of Patent: September 23, 1997Assignee: Exxon Chemical Patents Inc. (ECPI)Inventor: Johannes P. Verduijn
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Patent number: 5665325Abstract: Silica-bound extruded zeolites may be converted into binder-free zeolite aggregates by aging the zeolite in an aqueous ionic solution which contains hydroxy ions such that the initial molar ratio of OH.sup.- :SiO.sub.2 is up to 1.2 and which causes the silica binder to be converted substantially to zeolite of the type initially bound. Such extrudates have excellent mechanical strength and show advantageous properties such as adsorption comparable with non-extruded zeolite powder.Type: GrantFiled: May 26, 1995Date of Patent: September 9, 1997Assignee: Exxon Chemical Patents Inc.Inventor: Johannes Petrus Verduijn
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Patent number: 5624656Abstract: Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to convert the silica binder to zeolite L. These particles may comprise cylindrical zeolite L crystallites with a mean diameter of at least 0.05 micron in a zeolite L matrix and may be used as catalyst. Also acyclic hydrocarbons are dehydrocyclized and/or isomerized by contacting them at a temperature of from 370.degree. C. to 600.degree. C. with this catalyst incorporating at least one Group VIII metal having dehydrogenating activity to convert at least part of the acyclic hydrocarbons into aromatic hydrocarbons.Type: GrantFiled: June 7, 1995Date of Patent: April 29, 1997Assignee: Exxon Chemical Patents Inc. (ECPI)Inventors: Johannes P. Verduijn, Pieter E. Gellings
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Patent number: 5552035Abstract: A process for producing zeolite aggregates involves providing a formable paste composed of zeolite, a binder composed of an organic/metal oxide containing aluminum, a peptizing agent and water; forming the paste into an aggregate, preferably by extruding into an extrudate; curing the aggregate; hydro-thermally calcining the aggregate; and washing the hydro-thermally calcined aggregate with a washing medium, preferably followed by rinsing with a rinsing medium to remove residual washing medium from the aggregate. The washed and rinsed aggregate may then be permitted to equilibrate or is subjected to a drying procedure. Preferably, the washed and rinsed aggregate is again subjected to curing/hydro-thermal calcining.Type: GrantFiled: July 6, 1994Date of Patent: September 3, 1996Assignee: Exxon Research and Engineering CompanyInventors: Mark J. Potter, Jar-Lin Kao, Virginia R. Cross, Thomas H. Vanderspurt, Edward K. Dienes, Robert E. Riley, Freddie L. Tungate, Arie Bortinger
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Patent number: 5491119Abstract: Potassium zeolites of type L in which the crystals are very flat cylinders of "hockeypuck" or "coin" shape may be prepared by adjusting the K.sub.2 O/SiO.sub.2 and SiO.sub.2 /Al.sub.2 O.sub.3 ratio and including in the mixture from which the zeolite is crystallized a small amount of divalent cation such as magnesium or barium. The resulting zeolite has a short channel length and is particularly useful as a base for aromatization catalysis.Type: GrantFiled: June 30, 1992Date of Patent: February 13, 1996Assignee: Exxon Chemical Patents Inc.Inventor: Johannes P. Verduijn
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Patent number: 5486498Abstract: Zeolite L with flat basal planes, and reduced crystallite size is prepared in a synthesis modified by the addition of small amounts of additional metal such as magnesium, calcium, barium, cobalt, zinc, chromium, manganese or nickel. The addition of these metals also suppresses unwanted zeolite W formation even when the synthesis would otherwise form this zeolite.Type: GrantFiled: March 3, 1995Date of Patent: January 23, 1996Assignee: Exxon Research & Engineering CompanyInventor: Johannes P. Verduijn
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Patent number: 5486348Abstract: Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to convert the silica binder to zeolite L. These particles may comprise cylindrical zeolite L crystallites with a mean diameter of at least 0.05 micron in a zeolite L matrix and may be used as catalyst. Also acyclic hydrocarbons are dehydrocyclized and/or isomerized by contacting them at a temperature of from 370.degree. C. to 600.degree. C. with this catalyst incorporating at least one Group VIII metal having dehydrogenating activity to convert at least part of the acyclic hydrocarbons into aromatic hydrocarbons.Type: GrantFiled: October 12, 1994Date of Patent: January 23, 1996Assignee: Exxon Research & Engineering (ER&E)Inventors: Johannes P. Verduijn, Pieter E. Gellings
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Patent number: 5460796Abstract: Silica-bound extruded zeolites may be converted into binder-free zeolite aggregates by aging the zeolite in an aqueous ionic solution which contains hydroxy ions such that the initial molar ratio of OH-:SiO.sub.2 is up to 1.2 and which causes the silica binder to be converted substantially to zeolite of the type initially bound. Such extrudates have excellent mechanical strength and show advantageous properties such as adsorption comparable with non-extruded zeolite powder.Type: GrantFiled: November 7, 1994Date of Patent: October 24, 1995Assignee: Exxon Chemical Patents Inc.Inventor: Johannes P. Verduijn
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Patent number: 5396009Abstract: Zeolite L with flat basal planes, and reduced crystallite size is prepared in a synthesis modified by the addition of small amounts of additional metal such as magnesium, calcium, barium, cobalt, zinc, chromium, manganese or nickel. The addition of these metals also suppresses unwanted zeolite W formation even when the synthesis would otherwise form this zeolite.Type: GrantFiled: July 2, 1993Date of Patent: March 7, 1995Assignee: Exxon Research & EngineeringInventor: Johannes P. Verduijn
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Patent number: 5348924Abstract: A process for producing zeolite aggregates involves providing a formable paste composed of zeolite, a binder composed of an organic/metal oxide containing aluminum, a peptizing agent and water; forming the paste into an aggregate, preferably by extruding into an extrudate; curing the aggregate; hydro-thermally calcining the aggregate; and washing the hydro-thermally calcined aggregate with a washing medium, preferably followed by rinsing with a rinsing medium to remove residual washing medium from the aggregate. The washed and rinsed aggregate may then be permitted to equilibrate or is subjected to a drying procedure. Preferably, the washed and rinsed aggregate is again subjected to curing/hydro-thermal calcining.Type: GrantFiled: February 23, 1993Date of Patent: September 20, 1994Assignee: Exxon Research & Engineering Co.Inventors: Mark J. Potter, Jar-Lin Kao, Virginia R. Cross, Thomas H. Vanderspurt, Edward K. Dienes, Robert E. Riley, Freddie L. Tungate, Arie Bortinger
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Patent number: 5300720Abstract: Zeolite L containing caesium is prepared by a process in which said zeolite L is crystallised from a synthesis mixture with a molar composition (expressed as oxides) of:______________________________________ K.sub.2 O/SiO.sub.2 0.15 to 0.40 K.sub.2 O/Cs.sub.2 O 3 to 10 H.sub.2 O/K.sub.2 O 40 to 100 and SiO.sub.2 /Al.sub.2 O.sub.3 7 to 13 ______________________________________and containing 0.5 to 15 ppm (by weight) of divalent metal carbons, e.g. Mg ions. The zeolite L is used in dehydrocyclisation and/or isomerisation processes.Type: GrantFiled: November 30, 1989Date of Patent: April 5, 1994Assignee: Exxon Research & Engineering CompanyInventors: Johannes P. Verduijn, Pieter E. Gellings