Performance of Cetyl Trimethyl Ammonium Bromide and Three Dodecyl Anionic Surfactants in Oil Displacing System

Abstract: Three kinds of anionic surfactants with different hydrophilic groups (sodium dodecylbenzene sulfonate (sodium a lky l benzene sulfonate, ABS)) and sodium dodecyl sulfate (sodium dodecy l sulfa te, SDS) were studied. , Sodium dodecyl carboxylate (sod ium d ichloro isocyanura te, SDC) and cationic surfactant (cetyl trimethyl ammonium bromide (ce tyltriethy l amm onium brom ide, CTAB)) The performance of the system, the compatibility, foam volume, foam stability, contact angle, surface tension and interfacial tension of the compound system are investigated. The results of the study indicate that when the molar ratio of the anion-cation compound system is close to 1: 1, the entire system The foam performance decreases, the surface tension and interfacial tension tend to the maximum, and the contact angle tends to the minimum; in the SDC ?? CTAB system, when w (CTAB) = 10% ~
At 30%, the crude oil of the compounding system and Shengli Oilfield formed an ultra-low interfacial tension.
Keywords: surfactant; compound system; molar ratio; foam properties; interfacial tension

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