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:
Dec. 29, 2015
Filed:
Feb. 22, 2013
Shell Oil Company, Houston, TX (US);
Julian Richard Barnes, Amsterdam, NL;
Hendrik Dirkzwager, Amsterdam, NL;
Robert Moene, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
The invention relates to a process for preparing an internal olefin sulfonate, comprising sulfonating an internal olefin, having an average carbon number that is equal to or greater than 20, in a sulfonation reactor into sulfonated internal olefin followed by contacting sulfonated internal olefin with a base containing solution, wherein the sulfonation reactor is cooled with a cooling means having a temperature which is greater than 35° C. Further, the invention relates to an internal olefin sulfonate obtainable by said process, and to use of internal olefin sulfonates obtainable or obtained by said process as a surfactant, suitably as a surfactant in chemical Enhanced Oil Recovery.