The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 2008
Filed:
Aug. 27, 2004
Daniel M. Hasenberg, Kingwood, TX (US);
Mitchell D. Refvik, Bartlesville, OK (US);
Christopher Raymond Tully, Borger, TX (US);
Michael S. Hankinson, Bartlesville, OK (US);
Clyde Stewart Denton, Borger, TX (US);
Dale Solaas, Fritch, TX (US);
Daniel M. Hasenberg, Kingwood, TX (US);
Mitchell D. Refvik, Bartlesville, OK (US);
Christopher Raymond Tully, Borger, TX (US);
Michael S. Hankinson, Bartlesville, OK (US);
Clyde Stewart Denton, Borger, TX (US);
Dale Solaas, Fritch, TX (US);
Chevron Phillips Chemical Company LP, The Woodlands, TX (US);
Abstract
Removing impurities from a heptane stream by contacting the heptane stream with an acidic catalyst, wherein the contacting reduces a concentration of one or more close boiling impurities, one or more olefins, or both. The impurities are isomerized via contact with the acidic catalyst into species that possess lower octane levels or that do not possess boiling points as near to the boiling point of n-heptane, which promotes separation of the impurities via distillation. Close boiling impurities may include such compounds as cis-1,2-dimethylcyclopentane and methylcyclohexane or may be compounds having boiling points at a standard pressure of 760 Torr in the range of about 96.5 to about 100.5 degrees Celsius including such compounds as cis-1,2-dimethylcyclopentane and methylcyclohexane. The concentration of cis-1,2-dimethylcyclopentane and methylcyclohexane may be reduced by at least about 25 and 10 percent by weight, respectively. The concentration of olefins, as measured by the Bromine Index, may be reduced by at least about 25 percent by weight.