Patent ID: 11898100
Assignee: CHEVRON U.S.A. INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 18:
19. The method of claim 17, wherein the one or more surfactants comprise one or more anionic surfactants, and
wherein the one or more anionic surfactant comprise one or more of the following:
a branched or unbranched C6-C32:PO(0-65):EO(0-110)-carboxylate, a branched or unbranched C6-C30:PO(30-40):EO(25-35)-carboxylate, a branched or unbranched C6-C12:PO(30-40):EO(25-35)-carboxylate, or a branched or unbranched C6-C30:EO(8-30)-carboxylate;
a C8-C30 alkyl benzene sulfonate (ABS);
an internal olefin sulfonate (IOS);
an isomerized olefin sulfonate;
an alfa olefin sulfonate (AOS),
a sulfosuccinate surfactant;
an alcohol sulfate surfactant;
an alkoxy sulfate surfactant;
a surfactant defined by the formula below

R1-R2-R3, wherein
R1 comprises a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having 6-32 carbon atoms and an oxygen atom linking R1 and R2;
R2 comprises an alkoxylated chain comprising at least one oxide group selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, and any combination thereof; and
R3 comprises a branched or unbranched hydrocarbon chain comprising 2-12 carbon atoms and from 2 to 5 carboxylate groups;
a surfactant defined by the formula below, , wherein
R4 is, individually for each occurrence, a branched or unbranched, saturated or unsaturated, cyclic or non-cyclic, hydrophobic carbon chain having 6-32 carbon atoms; and
M represents a counterion;
or any combination thereof.