Patent ID: 8389448

Claim:
A process of recovering crude oil from a subterranean hydrocarbon containing formation which comprises (a) injecting into said formation an aqueous solution where one or more anionic ether amines with the structure described below, where; R=C1-C30 alkane, C1-C30 alkenyl, C4-C18 alkylphenol, or C4-C18 Dialkylphenol; R′=H, C1-C30 Alkane, C1-C30 Alkenyl or, R—(X)x(Y)y; R′″=H or OH; X=methyl oxirane; Y=oxirane; X and Y can be present in either order, or be a mixture of the two; x+y=1 to 100; z=0 or 1; Z=SO 3 M or COOM; and M=H, Na, K, NH 4 ; b) displacing said solution into one or more injection wells and recovering the oil from one or more production wells.