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:
Nov. 18, 2014
Filed:
May. 20, 2011
John C. Hutchison, Chicago, IL (US);
Patrick Shane Wolfe, Palatine, IL (US);
John C. Hutchison, Chicago, IL (US);
Patrick Shane Wolfe, Palatine, IL (US);
Stepan Company, Northfield, IL (US);
Abstract
A process for recovering oil from an oil-bearing formation comprises introducing into said formation an aqueous composition comprising at least one sulfonated derivative of one or more internal olefins, said internal olefins being characterized by having low amounts of tri-substitution on the olefin bond, said sulfonated derivative being obtained by sulfonating a composition comprising internal olefins of the formula: RRC═CRRwherein R, R, Rand Rare the same or different and are hydrogen or straight- or branched-chain, saturated hydrocarbyl groups and the total number of carbon atoms of R, R, Rand Ris 6 to 44 with the proviso that at least about 96 mole percent of Rand Rare straight- or branched-chain, saturated hydrocarbyl groups and at least about 96 mole percent of Rand Rare hydrogen. Further provided are compositions for use in recovering oil from an oil bearing formation.