Patents by Inventor Diane M. Chapman

Diane M. Chapman 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).

  • Substitution of Sn in place of Al in the framework of molecular sieve via treatment with fluoride salts
    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
  • Substitution of Sn in place of Al in the framework of molecular sieve via treatment with fluoride salts
    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
  • Hydrocarbon conversion process using a chromium substituted molecular sieve
    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
  • Substitution of Cr in place of Al in the framework of molecular sieve via treatment with fluoride salts
    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
  • Process for inserting silicon into zeolite frameworks
    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