Patents by Inventor Yeo-Meng Lim

Yeo-Meng Lim 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).

  • Lowering nitrogen-containing Lewis bases in molecular sieve oligomerisation
    Patent number: 9169169
    Abstract: A process for the oligomerization of olefins includes treating, e.g., water washing, an olefin-containing hydrocarbon stream to lower the concentration of an organic nitrogen-containing Lewis base contained therein until the treated hydrocarbon stream is substantially free of the Lewis base; and subsequently contacting the treated hydrocarbon stream with a molecular sieve catalyst to produce a product including at least one oligomer.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: October 27, 2015
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: John Stephen Godsmark, George Marie Karel Mathys, Hubertus Joseph Beckers, Charles Morris Yarbrough, Stephen Harold Brown, Yeo-Meng Lim
  • Oligomerisation of olefins
    Patent number: 8115042
    Abstract: In the oligomerization of olefins in a tubular reactor employing a molecular sieve catalyst, the temperature of the reaction is monitored and the space velocity of the olefin feed to the reactor is reduced as the temperature increases. This has been found to increase catalyst life and lead to extended production runs. Further extensions of the production run are achieved by improving reactor operating stability as the end of the production run approaches.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: February 14, 2012
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: John Stephen Godsmark, Georges Marie Karel Mathys, Paul Hamilton, Stephen Harold Brown, Yeo-Meng Lim
  • Lowering Nitrogen-Containing Lewis Bases In Molecular Sieve Oligomerisation
    Publication number: 20110282092
    Abstract: Nitrogen-containing Lewis bases act as poisons for molecular sieve catalysts used in oligomerisation reactions. Lowering their presence in the feed prior to the contacting thereof with the molecular sieve brings a significant extension of catalyst life. Thus, processes that are directed to the lowering of these poisons are provided.
    Type: Application
    Filed: June 24, 2011
    Publication date: November 17, 2011
    Inventors: John Stephen Godsmark, George Marie Karel Mathys, Hubertus Joseph Beckers, Charles Morris Yarbrough, Stephen Harold Brown, Yeo-Meng Lim
  • Lowering nitrogen-containing Lewis bases in molecular sieve oligomerisation
    Patent number: 7989668
    Abstract: Nitrogen-containing Lewis bases act as poisons for molecular sieve catalysts used in oligomerisation reactions. A lowering of their presence in the feed prior to the contacting thereof with the molecular sieve brings a significant extension of catalyst life. Excessive elimination of these poisons may be disadvantageous. Lowering the levels of these catalyst poisons to more manageable concentrations is therefore preferred.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: August 2, 2011
    Assignee: Exxonmobil Chemical Patents Inc.
    Inventors: John Stephen Godsmark, Georges Marie Karel Mathys, Hubertus Joseph Beckers, Charles Morris Yarbrough, Stephen Harold Brown, Yeo-Meng Lim
  • Oligomerisation of Olefins
    Publication number: 20110124827
    Abstract: In the oligomerisation of olefins in a tubular reactor employing a molecular sieve catalyst, the temperature of the reaction is monitored and the space velocity of the olefin feed to the reactor is reduced as the temperature increases. This has been found to increase catalyst life and lead to extended production runs. Further extensions of the production run are achieved by improving reactor operating stability as the end of the production run approaches.
    Type: Application
    Filed: June 5, 2009
    Publication date: May 26, 2011
    Inventors: John Stephen Godsmark, Georges Marie Karel Mathys, Paul Hamilton, Stephen Harold Brown, Yeo-Meng Lim
  • Lowering nitrogen-containing Lewis bases in molecular sieve oligomerisation
    Publication number: 20070213575
    Abstract: Nitrogen-containing Lewis bases act as poisons for molecular sieve catalysts used in oligomerisation reactions. A lowering of their presence in the feed prior to the contacting thereof with the molecular sieve brings a significant extension of catalyst life. Excessive elimination of these poisons may be disadvantageous. Lowering the levels of these catalyst poisons to more manageable concentrations is therefore preferred.
    Type: Application
    Filed: February 1, 2007
    Publication date: September 13, 2007
    Inventors: John Stephen Godsmark, Georges Marie Karel Mathys, Hubertus Joseph Beckers, Charles Morris Yarbrough, Stephen Harold Brown, Yeo-Meng Lim