Process for producing mineral oil using surfactants based on a mixture of C28 Guerbet, C30 Guerbet, C32 Guerbet-containing hydrocarbyl alkoxylates

US9475977B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Christian Bittner · Bensheim, DE
• Günter Oetter · Bischofswerda, DE
• Jack Tinsley · Mannheim, DE
• Christian Spindler · Günzburg, DE
• Gabriela Alvarez-Juergenson · Mannheim, DE
• Sophie Maitro-Vogel · Mannheim, DE

Key dates

• Filing date: Oct 24, 2012
• Grant date: Oct 25, 2016
• Expiry date: Nov 9, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K8/584
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a surfactant mixture comprising at least three ionic surfactants which differ in terms of the hydrocarbyl moiety (R1)(R2)—CH—CH2— and are of the general formula (I)where R1, R2, A0, k, X, o, Y, a, b, M are each as defined in the description and the claims. The invention further relates to the use and preparation thereof, and to aqueous surfactant formulations comprising the mixtures, and to processes for producing mineral oil by means of Winsor type III microemulsion flooding, in which the aqueous surfactant formulation is injected into a mineral oil deposit through injection wells and crude oil is withdrawn from the deposit through production wells.