Patents by Inventor Rafi Jalkian

Rafi Jalkian 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: 7407809
    Abstract: A method for determining contamination in marine diesel lubricating oils. The method has been found to have particular utility in estimating asphaltenes contamination in marine diesel lubricating oils.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: August 5, 2008
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Paul Thomas Reischman, Rafi Jalkian
  • Publication number: 20070231912
    Abstract: A method for determining contamination in marine diesel lubricating oils. The method has been found to have particular utility in estimating asphaltenes contamination in marine diesel lubricating oils.
    Type: Application
    Filed: June 1, 2007
    Publication date: October 4, 2007
    Inventors: Paul Reischman, Rafi Jalkian
  • Patent number: 7241621
    Abstract: A method for determining contamination in marine diesel lubricating oils. The method has been found to have particular utility in estimating residual fuel and insolubles contamination in marine diesel lubricating oils.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: July 10, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Paul Thomas Reischman, Rafi Jalkian
  • Publication number: 20030194811
    Abstract: A method for determining contamination in marine diesel lubricating oils. The method has been found to have particular utility in estimating residual fuel and insolubles contamination in marine diesel lubricating oils.
    Type: Application
    Filed: October 18, 2002
    Publication date: October 16, 2003
    Inventors: Paul Thomas Reischman, Rafi Jalkian
  • Patent number: 5583049
    Abstract: A method and system for controlling an HF alkylation system comprising a reactor, a settler, an HF acid regenerator and a source of fresh HF acid wherein a stream of olefins and a stream of isobutanes are contacted in the reactor in the presence an HF acid catalyst. At least the reactor feed is sampled, and the sample is passed to an analyzer using an attenuated total reflectance cell. Signals are generated which are representative of infrared spectra of the samples in a range providing information on the amount of at least one of HF, water, ASO and sulfolane. These signals are simultaneously determined and generated because all absorb in the same spectral region. This aspect provides for viewing these distortions of the main HF absorption band to quantify these three components. The infrared spectra signals are compared with stored signals to generate control signals; and at least one of HF, water and sulfolane fed to the reactor feed is adjusted in response to the control signal.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: December 10, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Lawrence J. Altman, Rafi Jalkian
  • Patent number: 5407830
    Abstract: A method and system for controlling an HF alkylation system comprising a reactor, a settler, an HF acid regenerator and a source of fresh HF acid wherein a stream of olefins and a stream of isobutanes are contacted in the reactor in the presence an HF acid catalyst. At least the reactor feed is sampled, and the sample is passed to an analyzer using an attenuated total reflectance cell. Signals are generated which are representative of infrared spectra of the samples in a range providing information on the amount of at least one of HF, water, ASO and sulfolane. These signals are simultaneously determined and generated because all absorb in the same spectral region. This aspect provides for viewing these distortions of the main HF absorption band to quantify these three components. The infrared spectra signals are compared with stored signals to generate control signals; and at least one of HF, water and sulfolane fed to the reactor feed is adjusted in response to the control signal.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: April 18, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Lawrence J. Altman, Rafi Jalkian
  • Patent number: 5304522
    Abstract: A process is disclosed for regenerating a spent liquid acid catalyst comprising the steps of:(a) providing a spent liquid acid catalyst comprising HF, sulfolane, and conjunct polymeric byproducts formed during the HF-catalyzed reaction of isoparaffin and olefin to form isoparafinnic alkylate;(b) providing a finely divided solid sorbent, wherein said solid sorbent preferentially and reversibly sorbs said conjunct polymeric byproducts from a mixture containing HF, sulfolane;(c) mixing said spent liquid acid catalyst of step (a) with said solid sorbent of step (b) by charging said spent liquid acid catalyst to the driving fluid inlet of an eductor and drawing a stream containing said solid sorbent into said eductor;(d) holding said mixture of step (c) in contact for time sufficient for said solid sorbent to preferentially sorb at least a portion of said conjunct polymeric byproducts from said spent liquid acid catalyst to produce a conjunct polymer-enriched sorbent and to regenerate said liquid acid catalyst; an
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: April 19, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Rafi Jalkian, Tomas R. Melli
  • Patent number: 5264650
    Abstract: The present invention provides a method for separating conjunct polymers which are formed as byproducts of acid catalyzed isoparaffin-olefin alkylation and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid comprising the sequential steps of:(a) separating hydrofluoric acid from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid to provide a first intermediate stream containing less than about 30 percent hydrofluoric acid by weight;(b) mixing said intermediate stream with a nonpolar extraction solvent to provide a second intermediate stream; and(c) gravitationally separating said intermediate stream into a less dense extract stream enriched in conjunct polymers and a more dense liquid stream enriched in sulfolane.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: November 23, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Michael A. Better, Jonathan E. Child, Kenneth J. Del Rossi, Edward H. Edelson, Anagha A. Gupte, Rafi Jalkian, Tomas R. Melli, Sergei Yurchak
  • Patent number: 5264652
    Abstract: The present invention provides a method for separating conjunct polymers which are formed as byproducts of acid catalyzed isoparaffin-olefin alkylation and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid comprising the sequential steps of:(a) separating hydrofluoric acid from said mixture to provide an intermediate stream containing less than about 30 percent hydrofluoric acid by weight;(b) gravitationally separating said intermediate stream into a more dense sulfolane-enriched stream and a less dense conjunct polymer-enriched stream;(c) distilling said more dense sulfolane-enriched stream of step (b) to provide an overhead stream containing a higher sulfolane concentration than said more dense sulfolane-enriched stream of step (b) and a bottom stream enriched in conjunct polymers.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: November 23, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Jonathan E. Child, Edward H. Edelson, Anagha A. Gupte, Rafi Jalkian, Tomas R. Melli, Sergei Yurchak