Patents by Inventor Denise M. Barthomeuf

Denise M. Barthomeuf 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).

  • Process for separating ethylbenzene from feedstream containing metaxylene using a zeolite adsorbent
    Patent number: 4778946
    Abstract: Ethylbenzene is separated from a paraxylene depleted feedstream containing meta-xylene by contacting the feedstream with a K-substituted Type Y zeolite, passing through the zeolite a selected desorbent, and recovering a stream enhanced in concentration of ethylbenzene relative to meta-xylene. Preferably, the desorbent is an aromatic hydrocarbon.The zeolite may contain an effective amount up to 10% by weight of total water and up to about 4% by weight methanol.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: October 18, 1988
    Assignee: Exxon Research and Engineering Company
    Inventors: Roger Hulme, Denise M. Barthomeuf
  • Process for separating ethylbenzene from xylenes by selective adsorption on a gallium beta zeolite (ATD-35)
    Patent number: 4751346
    Abstract: The invention relates to a process for selectively adsorbing ethylbenzene from a stream containing one or more isomeric xylenes. The ethylbenzene is adsorbed on a gallium Beta zeolite. A desorbent comprising para-dialkylbenzene gives the zeolite good ethylbenzene selectivity over the xylenes.
    Type: Grant
    Filed: April 22, 1986
    Date of Patent: June 14, 1988
    Assignee: Exxon Research & Engineering Co.
    Inventors: Denise M. Barthomeuf, Lawrence G. Daniel
  • Process for separating ethylbenzene from xylenes by selective adsorption on a rubidium substituted X zeolite
    Patent number: 4613725
    Abstract: The invention relates to a process for selectively absorbing ethylbenzene from a stream containing one or more isomeric xylenes. The ethylbenzene is adsorbed on an Rb-substituted Type X zeolite. Certain desorbents, of which n-alkylbenzenes are preferred, give the zeolite good ethylbenzene selectivity over the xylenes.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: September 23, 1986
    Assignee: Exxon Research and Engineering Company
    Inventor: Denise M. Barthomeuf
  • Process for separating ethylbenzene from xylenes by selective adsorption on a cesium substituted X zeolite
    Patent number: 4593149
    Abstract: The invention relates to a process for selectively adsorbing ethylbenzene from a stream containing one or more isomeric xylenes. The ethylbenzene is adsorbed on Cs-substituted Type X zeolite. Certain alkyl substituted benzene desorbents give the zeolite good ethylbenzene selectivity over the xylenes.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: June 3, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventor: Denise M. Barthomeuf
  • Process for enhancing the separation of paraxylene from a feedstream containing other xylenes and ethylbenzene using a zeolite adsorbent
    Patent number: 4593150
    Abstract: Paraxylene is separated from a feedstream containing ethylbenzene and other xylenes by contacting the feedstream preferably with a K-substituted Type Y zeolite, passing through the zeolite a selected additive, and recovering a stream enhanced in concentration of paraxylene relative to ethylbenzene. Preferably, the additive is a cyclic nitrogen containing compound such as pyrrole or pyridine.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: June 3, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventor: Denise M. Barthomeuf
  • Process for separating ethylbenzene from xylenes by selective adsorption on a Beta zeolite
    Patent number: 4584424
    Abstract: The invention relates to a process for selectively adsorbing ethylbenzene from a stream containing one or more isomeric xylenes. The ethylbenzene is adsorbed on a Beta zeolite. Certain desorbents, of which paradiethylbenzene is preferred, give the zeolite good ethylbenzene selectively over the xylenes.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: April 22, 1986
    Assignee: Exxon Research & Engineering Company
    Inventor: Denise M. Barthomeuf
  • Process for the separation of C.sub.9 aromatic isomers
    Patent number: 4554398
    Abstract: A process for separating a C.sub.9 aromatic isomer from a feed stream containing a mixture of C.sub.9 aromatic isomers by contacting the feed stream with a bed of the adsorbent zeolite beta. The adsorbed C.sub.9 aromatic isomer is removed from the adsorbent by desorption.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: November 19, 1985
    Assignee: Exxon Research & Engineering Co.
    Inventors: Denise M. Barthomeuf, Daniel D. Rosenfeld
  • Separation of ortho aromatic isomers by selective adsorption with an aluminophosphate
    Patent number: 4482776
    Abstract: An improved process for separating ortho aromatic isomers from a feed stream containing a mixture of aromatics by contacting the feed stream with a bed of the crystalline aluminophosphate adsorbent AlPO.sub.4 -5. The adsorbed ortho aromatic isomers is removed from the adsorbent by desorption.
    Type: Grant
    Filed: June 27, 1983
    Date of Patent: November 13, 1984
    Assignee: Exxon Research & Engineering Co.
    Inventors: Daniel D. Rosenfeld, Denise M. Barthomeuf