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:
Jun. 08, 2021
Filed:
Mar. 30, 2017
Applicant:
Rhodia Operations, Paris, FR;
Inventors:
Assignee:
RHODIA OPERATIONS, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/584 (2006.01); C07C 229/12 (2006.01); C07C 309/14 (2006.01); E21B 43/16 (2006.01);
U.S. Cl.
CPC ...
C09K 8/584 (2013.01); C07C 229/12 (2013.01); C07C 309/14 (2013.01); E21B 43/16 (2013.01);
Abstract
The instant invention relates to surfactants having the following formula (I) wherein: each of Rand Ris a linear or branched, saturated or unsaturated, hydrocarbon chain, each of Rand Ris a alkyl chain having 1 to 10 carbon atoms, each of (E) and (E) is a divalent hydrocarbon radical, A is: a group a carboxylate group —COO(optionally in all or part in the form —COOH); or a sulfonate group —SO(optionally in all or part in the form —SOH). The invention also relate to the preparation of these surfactants and their use in oil extraction, especially in EOR applications.