Patent ID: 11891458
Assignee: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC CORP.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 3:
4. The method of claim 1, wherein the zwitterionic surfactant in step (2) has a structural formula as follows:, wherein m is an integer of 2-6, R is a saturated carbon chain containing 1-18 carbon atoms, wherein the zwitterionic surfactant is selected from dimethyldodecylsulfopropyl ammonium salt, dimethylhexadecylsulfoethyl ammonium salt, dimethyloctadecylsulfobutyl ammonium salt, dimethyl (3-hydroxydodecyl) sulfopropyl ammonium salt, dimethyl (6-aminotetradecyl) sulfoethyl ammonium salt, and mixtures thereof.