Patents by Inventor Carolyn Duncan

Carolyn Duncan 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).

  • Publication number: 20050182284
    Abstract: A selectivated molecular sieve, e.g., ZSM-22 or ZSM-23, is used as olefin oligomerization catalyst to provide product, e.g., octenes and dodecenes from butene, having a low degree of branching and hindered double bonds.
    Type: Application
    Filed: March 28, 2003
    Publication date: August 18, 2005
    Inventors: Jon Stanat, Georges Mathys, David Turner, Jane Cheng, Stephen Beadle, Cesar Cheng Guajardo, Roger Eijkhoudt, Allen Godwin, Ernest Green, Charles Yarbrough, Raphael Caers, Carolyn Duncan, Ramzi Saleh
  • Publication number: 20050176991
    Abstract: In a process for preparing an olefinic hydrocarbon mixture comprising at least 5% by weight of mono-olefin oligomers of the empirical formula: CnH2n where n is greater than or equal to 6, a feedstock comprising n-butene and propylene in a molar ratio of about 1:0.01 to about 1:0.49 is contacted under oligomerization conditions with surface deactivated ZSM-23. The resultant mono-olefin oligomers comprise at least 20 percent by weight of olefins having at least 12 carbon atoms, wherein said olefins having at least 12 carbon atoms have an average of from about 0.8 to about 2.0 C1-C3 alkyl branches per carbon chain.
    Type: Application
    Filed: March 28, 2003
    Publication date: August 11, 2005
    Inventors: Stephen Beadle, Cesar Cheng-Guajardo, Carolyn Duncan, David Turner, Ramzi Saleh
  • Publication number: 20050165250
    Abstract: In a process for oligomerizing a C2 to C6 n-olefin feedstock over surface deactivated ZSM-23, the feedstock contains from about 0.1 wt % to about 25 wt % of an iso-olefin and the C12+ fraction of the oligomerized olefin product contains less than 0.5 atom % of quaternary carbon atoms.
    Type: Application
    Filed: March 28, 2003
    Publication date: July 28, 2005
    Inventors: Carolyn Duncan, Raphael Caers, David Turner, Michael Keenan, Ernest Green, Ramzi Saleh
  • Publication number: 20050165264
    Abstract: In a process for preparing an alkylaromatic hydrocarbon composition an olefinic hydrocarbon mixture and an aromatic compound are contacted under alkylation conditions with an aromatic alkylation catalyst selected from a homogeneous acid catalyst and heterogeneous acid catalyst comprising a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstroms. The olefinic hydrocarbon mixture comprises at least 5 wt % by weight of mono-olefin oligomers of the empirical formula: CnH2n wherein n is greater than or equal to 10, the mono-olefin oligomers comprising at least 20 percent by weight of olefins having at least 12 carbon atoms, and the olefins having at least 12 carbon atoms having an average of from 0.8 to 2.0 C1-C3 alkyl branches per carbon chain.
    Type: Application
    Filed: March 28, 2003
    Publication date: July 28, 2005
    Applicant: ExxonMobil Chemical Patents Inc.
    Inventors: Carolyn Duncan, David Turner, Jane Cheng, Charles Yarbrough, Raphael Caers, Ramzi Saleh, James Propp