The Composition and Interfacial Activity of Alkyl Benzene Sulfonates Used in Oil Recovery

Abstract

The composition of heavy alkyl benzene sulfonates (HABS) was determined and the HABS was separated by a preparative HPLC. The surface and interfacial tensions of the components were measured. The results show that the HABS is a mixture of homologues, C n ABS, with different alkyl carbon numbers ranging from 12 to 25 on phenyl group. The CMC of six components, C 12 ABS, C 13 ABS, C 16 ABS, C 17 ABS, C 18 ABS, and C 19 ABS are 0.401-0.030 g·L −1 . The C 16 ABS has the strongest interfacial activities. There occurred synergism between C 16 ABS and ionized organic acids in the crude oil produced by Na 2 CO 3 .

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“…Alpha‐olefin sulfonate (AOS), internal olefin sulfonate (IOS), alkyl benzene sulfonate (ABS) and sodium dodecyl benzene sulfonate (SDBS) were commonly used commercial surfactants in chemical EOR, CMC was usually between 10 −4 and 10 −2 mol/L, and the SFT CMC was between 28 and 35 mN/m (Farajzadeh et al, 2008; Tabuchi & Sakai, 2021; Wang et al, 2015; Xu et al, 2019). Compared with them, PADS has a lower CMC concentration.…”

A mechanism study of sodium dodecylbenzene sulfonate on oil recovery: effect of branched chain structure

“…Alkylbenzene sulfonates are widely employed in EOR and the considerable researches have been carried out on their chemical synthesis, performance evaluation, and practical application [20][21][22][23][24][25][26][27]. According to the mentioned above, as an important factor to influence the effect of oil displacement, the analysis on the molecular structures of surfactant has attracted more and more interests.…”