Patents by Inventor Edith M. Flanigen

Edith M. Flanigen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7258795
    Abstract: A process and adsorbent for removing contaminants from silicone based solvents is disclosed. The process provides for cleaning a solvent for reuse, and regeneration of the adsorbent. The adsorbents are for adsorbing organic and inorganic compounds that have accumulated in the silicone solvents.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: August 21, 2007
    Assignee: UOP LLC
    Inventors: Laszlo T. Nemeth, Anil R. Oroskar, Edith M. Flanigen
  • Patent number: 5744673
    Abstract: The present invention relates to a zeolite beta catalyst characterized by critical limits of weak and strong acid species and exceptionally high catalytic activity. The catalyst is activated at a temperature effective to substantially reduce the concentration of strong acid species, i.e., hydronium cations, without substantially reducing the concentration of weak acid species, i.e., hydroxoaluminum cations, preferably following a calcining step wherein a synthesized zeolite beta catalyst containing a templating agent is calcined at a temperature in the range of from about 200.degree. to 1000.degree. C. in order to remove a substantial portion of the catalyst templating agent and an ion-exchanging step wherein the calcined catalyst is ion-exchanged with a salt solution containing at least one hydrogen forming cation selected from NH.sub.4.sup.+ and quaternary ammonium.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: April 28, 1998
    Assignee: UOP
    Inventors: Gary W. Skeels, Edith M. Flanigen
  • Patent number: 5659099
    Abstract: The present invention relates to a zeolite beta catalyst characterized by critical limits of weak and strong acid species and exceptionally high catalytic activity. The catalyst is activated at a temperature effective to substantially reduce the concentration of strong acid species, i.e., hydronium cations, without substantially reducing the concentration of weak acid species, i.e., hydroxoaluminum cations, preferably following a calcining step wherein a synthesized zeolite beta catalyst containing a templating agent is calcined at a temperature in the range of from about 200.degree. to 1000.degree. C. in order to remove a substantial portion of the catalyst templating agent and an ion-exchanging step wherein the calcined catalyst is ion-exchanged with a salt solution containing at least one hydrogen forming cation selected from NH.sub.4.sup.+ and quaternary ammonium.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: August 19, 1997
    Assignee: UOP
    Inventors: Gary W. Skeels, Edith M. Flanigen
  • Patent number: 5518708
    Abstract: Molecular sieve compositions are prepared by extracting aluminum and substituting chromium and/or tin for extracted aluminum to give molecular sieve products containing framework chromium and/or tin atoms. The process of preparing the chromium and/or tin-containing molecular sieves involves contacting a starting molecular sieve with a solution or slurry of at least one of a fluoro salt of chromium or a fluoro salt of tin under effective process conditions to provide for aluminum extraction and substitution of chromium and/or tin.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: May 21, 1996
    Assignee: UOP
    Inventors: Gary W. Skeels, Diane M. Chapman, Edith M. Flanigen
  • Patent number: 5401488
    Abstract: Molecular sieve compositions are prepared by extracting aluminum and substituting chromium and/or tin for extracted aluminum to give molecular sieve products containing framework chromium and/or tin atoms. The process of preparing the chromium and/or tin-containing molecular sieves involves contacting a starting molecular sieve with a solution or slurry of at least one of a fluoro salt of chromium or a fluoro salt of tin under effective process conditions to provide for aluminum extraction and substitution of chromium and/or tin.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: March 28, 1995
    Assignee: UOP
    Inventors: Gary W. Skeels, Diane M. Chapman, Edith M. Flanigen
  • Patent number: 5393718
    Abstract: The present invention relates to a zeolite beta catalyst characterized by critical limits of weak and strong acid species and exceptionally high catalytic activity. The catalyst is activated at a temperature effective to substantially reduce the concentration of strong acid species, i.e., hydronium cations, without substantially reducing the concentration of weak acid species, i.e., hydroxoaluminum cations, preferably following a calcining step wherein a synthesized zeolite beta catalyst containing a templating agent is calcined at a temperature in the range of from about 200.degree. to 1000.degree. C. in order to remove a substantial portion of the catalyst templating agent and an ion-exchanging step wherein the calcined catalyst is ion-exchanged with a salt solution containing at least one hydrogen forming cation selected from NH.sub.4.sup.+ and quaternary ammonium. Conversion processes utilizing the catalyst of the invention also are disclosed.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: February 28, 1995
    Assignee: UOP
    Inventors: Gary W. Skeels, Edith M. Flanigen
  • Patent number: 5366616
    Abstract: This invention relates to hydrocarbon conversion processes using novel molecular sieve compositions as the catalyst. These molecular sieves contain chromium in the framework structure along with aluminum and silicon. The process of preparing the chromium-containing molecular sieves involves contacting a starting molecular sieve with a solution or slurry of a fluoro salt of chromium under effective process conditions to provide for aluminum extraction and substitution of chromium.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: November 22, 1994
    Assignee: UOP
    Inventors: Gary W. Skeels, Diane M. Chapman, Edith M. Flanigen
  • Patent number: 5258570
    Abstract: The present invention relates to a zeolite beta catalyst characterized by critical limits of weak and strong acid species and exceptionally high catalytic activity. The catalyst is activated at a temperature effective to substantially reduce the concentration of strong acid species, i.e., hydronium cations, without substantially reducing the concentration of weak acid species, i.e., hydroxoaluminum cations, preferably following a calcining step wherein a synthesized zeolite beta catalyst containing a templating agent is calcined at a temperature in the range of from about 200.degree. to 1000.degree. C. in order to remove a substantial portion of the catalyst templating agent and an ion-exchanging step wherein the calcined catalyst is ion-exchanged with a salt solution containing at least one hydrogen forming cation selected from NH.sub.4.sup.+ and quaternary ammonium. Conversion processes utilizing the catalyst of the invention also are disclosed.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: November 2, 1993
    Assignee: UOP
    Inventors: Gary W. Skeels, Edith M. Flanigen
  • Patent number: 5208197
    Abstract: The combination of a steam-stabilized form of zeolite Y, known in the art as Y-85, and a form of zeolite beta which has been modified to maximize the weak acid sites and minimize the strong acid sites, is found to be a uniquely effective acidic component of a hydrocracking catalyst for the production of gasoline. Both the catalyst composition and the hydrocracking process utilizing the catalyst are disclosed.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: May 4, 1993
    Assignee: UOP
    Inventors: James G. Vassilakis, Donald F. Best, Gary W. Skeels, Edith M. Flanigen
  • Patent number: 5192722
    Abstract: This invention relates to processes for preparing a ceramic article having as its principal crystalline phase a leucite/pollucite solid solution. The process involves the use of a zeolite to form the article. Zeolites which can be used are those that have a SiO.sub.2 /Al.sub.2 O.sub.3 ratio of about 3.5 to about 7.5 such as zeolite Y. The zeolite is exchanged with potassium, rubidium and cesium, then calcined at a temperature of about 900.degree. to about 1100.degree. C. for a time to collapse the zeolite framework and provide an amorphous powder. Next, the amorphous powder is formed into a shaped article and the article is sintered at a temperature of about 1150.degree. to about 1400.degree. C. for a time of about 0.5 to about 12 hours to give a ceramic article whose principal crystalline phase is a leucite/pollucite solid solution, is substantially crack free, has less than 5% porosity, and a coefficient of thermal expansion of about 2.times.10.sup.-6 to about 27.times.10.sup.-60 C.sup.-1.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: March 9, 1993
    Assignee: UOP
    Inventors: Robert L. Bedard, Edith M. Flanigen
  • Patent number: 5186918
    Abstract: Molecular sieve compositions are prepared by extracting aluminum and substituting chromium and/or tin for extracted aluminum to give molecular sieve products containing framework chromium and/or tin atoms. The process of preparing the chromium and/or tin-containing molecular sieves invovles contacting a starting molecular sieve with a solution or slurry of at least one of a fluoro salt of chromium or a fluoro salt of tin under effective process conditions to provide for aluminum extraction and substitution of chromium and/or tin. These compositions are effective as hydrocarbon conversion catalysts and for separating mixtures of molecular species.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: February 16, 1993
    Assignee: UOP
    Inventors: Gary W. Skeels, Diane M. Chapman, Edith M. Flanigen
  • Patent number: 5179051
    Abstract: This invention relates to a process for preparing a lithium containing ceramic article. The process provides a ceramic article that is substantially crack free and has as its principal crystalline phase a beta-eucryptite phase, a beta-spodumene phase, or a mixture thereof. The process comprises calcining a powder of a lithium-exchanged zeolite up to its collapse temperature for a time sufficient to collapse the zeolite framework and provide an amorphous powder. The amorphous powder is now formed into a shaped article and sintered at a temperature of about 700.degree. to about 1150.degree. C. for a time of about 1 to about 12 hours. The zeolites which can be used are those having a SiO.sub.2 Al.sub.2 O.sub.3 ratio of about 2 to about 8.5 and include zeolite B, zeolite ZK-19, zeolite W, phillipsite, hormotome, gismondine and mixtures thereof and have a sodium content less than about 1 weight percent. It is preferred that the lithium-exchanged zeolite have an average particle size of less than about 10 microns.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: January 12, 1993
    Assignee: UOP
    Inventors: Robert L. Bedard, Edith M. Flanigen
  • Patent number: 5160033
    Abstract: The combination of a steam-stabilized form of zeolite Y, known in the art as Y-85, and a form of zeolite beta which has been modified to maximize the weak acid sites and minimize the strong acid sites, is found to be a uniquely effective acidic component of a hydrocracking catalyst for the production of gasoline. Both the catalyst composition and the hydrocracking process utilizing the catalyst are disclosed.
    Type: Grant
    Filed: May 1, 1991
    Date of Patent: November 3, 1992
    Assignee: UOP
    Inventors: James G. Vassilakis, Donald F. Best, Gary W. Skeels, Edith M. Flanigen
  • Patent number: 5160717
    Abstract: Titanium-aluminum-silicon-oxide molecular sieves having three-dimensional microporous crystalline framework structures of tetrahedral oxide units TiO.sub.2, AlO.sub.2 and SiO.sub.2 are disclosed having use as molecular sieves and as catalyst compositions in hydrocarbon conversion and other processes.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: November 3, 1992
    Assignee: UOP
    Inventors: Brent M. T. Lok, Bonita K. Marcus, Edith M. Flanigen
  • Patent number: 5128025
    Abstract: This invention deals with a hydrocarbon conversion process using a crystalline oxysulfide composition. The crystalline oxysulfide composition has a three-dimensional microporous framework structure of at least MO.sub.2, MS.sub.2, and MOS tetrahedral units, having an intracrystalline pore system and an empirical formula expressed in molar ratios:(M.sub.s Al.sub.t P.sub.u Si.sub.v)S.sub.w O.sub.2-wwhere M is at least one metal selected from the group consisting of metals which: 1) can be incorporated into the framework structure of a microporous molecular sieve and 2) form hydrolytically stable sulfides; s, t, u, v and w are the mole fractions of M, Al, P, Si and S respectively. The values of s, t, u and v are chosen such that when t is greater than zero u is greater than zero, s+t+u+v=1 and when s=1, M is only a combination of gallium and germanium.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: July 7, 1992
    Assignee: UOP
    Inventors: Robert L. Bedard, Edith M. Flanigen, Stephen T. Wilson
  • Patent number: 5122357
    Abstract: This invention deals with a crystalline oxysulfide composition, a process for preparing the composition, a catalyst using the composition and processes using the composition. The crystalline oxysulfide composition has a three-dimensional microporous framework structure of at least MO.sub.2, MS.sub.2, and MOS tetrahedral units, having an intracrystalline pore system and an empirical formula expressed in molar ratios:(M.sub.s Al.sub.t P.sub.u Si.sub.v)S.sub.w O.sub.2-wwhere M is at least one metal selected from the group consisting of metals which: 1) can be incorporated into the framework structure of a microporous molecular sieve and 2) form hydrolytically stable sulfides; s, t, u, v and w are the mole fractions of M, Al, P, Si and S respectively. The oxysulfide composition is prepared by contacting a molecular sieve having an empirical formula: (M.sub.s Al.sub.t P.sub.u Si.sub.v)O.sub.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: June 16, 1992
    Assignee: UOP
    Inventors: Robert L. Bedard, Edith M. Flanigen, Stephen T. Wilson
  • Patent number: 5116794
    Abstract: The present invention relates to methods for enhancing at least one catalytic property of a crystalline microporous three-dimensional solid catalyst having the structure and composition of zeolite beta for use in hydrocarbon conversion processes. An essential step in the methods of the present invention comprises activating the catalyst which had previously been calcined and subjected to ion-exchange with a hydrogen-forming cation by heating in air or in inert atmosphere at a temperature of from about 575.degree.-657.degree. C. and for a period of time sufficient to enhance at least one catalytic property of the catalyst for use in the hydrocarbon conversion process. Typical of the enhanced catalytic properties which can be achieved in accordance with the present invention are catalytic activity and catalytic selectivity.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: May 26, 1992
    Assignee: UOP
    Inventors: Gary W. Skeels, Edith M. Flanigen
  • Patent number: 5114563
    Abstract: The catalytic conversion of hydrocarbon feedstocks is affected under effective conversion process conditions in the presence of silicoaluminophosphate-based catalyst compositions.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: May 19, 1992
    Assignee: UOP
    Inventors: Brent M. Lok, Celeste A. Messina, Robert L. Patton, Richard T. Gajek, Thomas R. Cannan, Edith M. Flanigen
  • Patent number: 5100644
    Abstract: The removal of aluminum and silicon atoms from the framework of crystalline zeolites and the reinsertion of at least some of the removed silicon atoms into the sites vacated by extracted aluminum atoms is accomplished by the process of contacting the zeolite with an aqueous solution of a bifluoride salt, preferably ammonium bifluoride. The treated zeolites have higher crystal destruction temperatures than their precursor starting zeolites.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: March 31, 1992
    Assignee: UOP
    Inventors: Gary W. Skeels, Diane M. Chapman-Snyder, Edith M. Flanigen
  • Patent number: 5095169
    Abstract: The present invention relates to processes for isomerizing normal paraffin hydrocarbons to produce products containing non-normal hydrocarbons using a zeolite beta catalyst that has been activated in order to enhance its catalytic properties. In accordance with the present invention, the zeolite beta catalyst is activated at a temperature effective to substantially reduce the concentration of strong acid species, i.e., hydronium cations, without substantially reducing the concentration of weak acid species, i.e., hydroxoaluminum cations, both of said strong acid species and weak acid species being initially present on the catalyst prior to activation. In addition, the isomerization step is preferably conducted at a temperature at least 300.degree. C. lower than the activation temperature.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: March 10, 1992
    Assignee: UOP
    Inventors: Gary W. Skeels, Edith M. Flanigen