Patents by Inventor Cesar M. Cheng-Guajardo

Cesar M. Cheng-Guajardo 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).

  • Oligomerization of olefins
    Patent number: 7425662
    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: Grant
    Filed: March 28, 2003
    Date of Patent: September 16, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jon E. Stanat, Georges M. K. Mathys, David Wayne Turner, Jane C. Cheng, Stephen W. Beadle, Cesar M. Cheng Guajardo, Roger Eijkhoudt, Allen D. Godwin, Ernest E. Green, Charles M. Yarbrough, Raphael Frans Caers, Carolyn B. Duncan, Ramzi Y. Saleh
  • Process for olefin oligomerization
    Patent number: 7345212
    Abstract: A process for preparing a substantially linear olefinic hydrocarbon mixture is described in which a lower olefin feed comprising one or more C3 to C6 lower olefins is contacted in the presence of water and under olefin oligomerization conditions with a catalyst comprising surface-deactivated ZSM-23.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: March 18, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Stephen W. Beadle, Georges M. K. Mathys, Cesar M. Cheng-Guajardo
  • Process for preparing and olefinic hydrocarbon mixture
    Patent number: 7148388
    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: Grant
    Filed: March 28, 2003
    Date of Patent: December 12, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Stephen W. Beadle, Cesar M. Cheng-Guajardo, Carolyn B. Duncan, David Wayne Turner, Ramzi Y. Saleh