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. 11, 2017
Filed:
Aug. 21, 2015
Basf SE, Ludwigshafen, DE;
Christian Bittner, Bensheim, DE;
Günter Oetter, Frankenthal, DE;
Jack Tinsley, Mannheim, DE;
Christian Spindler, Ludwigshafen, DE;
Gabriela Alvarez-Juergenson, Mannheim, DE;
Sophie Vogel, Mannheim, DE;
Petra Neumann, Böhl-Iggelheim, DE;
Veronika Wloka, Mannheim, DE;
Martin Bock, Hannover, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for mineral oil extraction by means of Winsor type III microemulsion flooding, in which an aqueous surfactant formulation comprising at least three ionic surfactants which are different with regard to the alkyl moiety (R)(R)—CH—CH— and are of the general formula (R)(R)—CH—CH—O-(D)-(B)-(A)-XYa/bMis injected through injection boreholes into a mineral oil deposit, and crude oil is withdrawn from the deposit through production boreholes. The invention further relates to surfactant formulations of ionic surfactants of the general formula.