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:
Jul. 05, 2011
Filed:
Jan. 16, 2009
Rory H. Uibel, Salt Lake City, UT (US);
Robert E. Benner, Salt Lake City, UT (US);
Eric R. Jacobsen, Salt Lake City, UT (US);
Lee M. Smith, Salt Lake City, UT (US);
Rory H. Uibel, Salt Lake City, UT (US);
Robert E. Benner, Salt Lake City, UT (US);
Eric R. Jacobsen, Salt Lake City, UT (US);
Lee M. Smith, Salt Lake City, UT (US);
Process Instruments, Inc., Salt Lake City, UT (US);
Abstract
Systems and methods for determining olefin concentrations in olefin-containing fuels (e.g., gasoline) are described. Generally, a Raman spectrum from a linear-calibration reference sample (e.g., a pure hydrocarbon, such as toluene) and Raman spectra from multiple simulated fuel samples having known olefin concentrations are obtained. An area ratio for each simulated fuel sample is created by dividing the area in the olefin region of each fuel sample by the area in the chemical spectral region of the linear-calibration reference sample. The area ratio and the known olefin concentration for each simulated sample are used to create a linear olefin calibration. The olefin concentration of a fuel sample with an unknown olefin concentration is calculated by determining the area ratio between the olefin spectral region in the unknown sample and the chemical spectral region in a concentration-calculation reference sample (e.g., toluene) and placing the new area ratio into the linear olefin calibration.