Patents Assigned to CST Performance Products Corp.
  • Crosslinking composition for hydrocarbon gels
    Patent number: 8993492
    Abstract: A crosslinking composition for hydrocarbon gels containing phosphate ester gelling agents comprising a modified imidazoline or pyrimidine including an alkyl group (or unsaturated carbon chain) or of 10 to 22 carbon atoms, a polyamine, and ferric sulfate. The method of making the crosslinking agent features adding the polyamine after reaction of the other ingredients; unique gels formed with the crosslinking agent are particularly effective for LNG at very cold temperatures.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: March 31, 2015
    Assignee: CST Performance Products Corp.
    Inventors: Larry W. Gatlin, Glen E. Walden, Ernest McMillan
  • Low temperature hydrocarbon gel II
    Patent number: 8951941
    Abstract: A composition useful for crosslinking phosphate esters in hydrocarbon gels used in formation fracturing performs especially well in cold temperatures, such as temperatures lower than (?)20° C. Methods of making the crosslinking composition and the gel are described; also methods of fracturing subterranean formations. Specific forms of ferric sulfate and ferric ammonium citrate are useful as ingredients of the crosslinking composition.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: February 10, 2015
    Assignee: CST Performance Products Corp.
    Inventors: Larry W. Gatlin, Glen E. Walden, Ernest McMillan, Richard A. Gatlin
  • Breaking pumpable hydrocarbon gels
    Patent number: 8707978
    Abstract: Where the loss of volatile organics during storage of high gravity oil is minimized by forming a flowable or pumpable gel in the high gravity oil, (and/or condensates and distillates), as they are introduced to a storage vessel, the gel is broken by the addition of a small amount of an amine/formaldehyde reaction product, which may be either a triazine or a mixture of non-triazine reaction products. The previously gelled hydrocarbon may then by more readily moved by draining or pumping into a pipeline.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: April 29, 2014
    Assignee: CST Performance Products Corp.
    Inventors: Larry W. Gatlin, Glen E. Walden, Ernest McMillan, Richard A. Gatlin, Wayne Mueller