Experimental Study of the Effect of Strong Alkali on Lowering the Interfacial Tension of Oil/Heavy Alkylbenzene Sulfonates System

Experimental studies were conducted to explore the fundamental mechanisms of alkali to lower the interfacial tension of oil/heavy alkylbenzene sulfonates （HABS） system. Sodium hydroxide was used as the strong alkali chemical to investigate the interracial tension （IFT） of oil/HABS system. The influe...

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Published inChinese journal of chemistry Vol. 29; no. 11; pp. 2315 - 2319
Main Author 刘必心 侯吉瑞 唐红娇 徐海霞 郑自刚
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 01.11.2011
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
Subjects
ABS系统
Adsorption
alkali metal
heavy alkylbenzene sulfonates
interfacial tension
micelles
partition coefficient
Surfactants
低界面张力
实验
强碱
盐体
表面活性剂体系
表面活性剂胶束
重烷基苯磺酸盐
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Summary:Experimental studies were conducted to explore the fundamental mechanisms of alkali to lower the interfacial tension of oil/heavy alkylbenzene sulfonates （HABS） system. Sodium hydroxide was used as the strong alkali chemical to investigate the interracial tension （IFT） of oil/HABS system. The influences of salt and alkali on the interracial activity were studied by the measurement of interfacial tension and partition coefficient. Moreover, the al- kali/surfactant solutions were measured by dynamic laser scattering. The results showed that compared with the salt, the function of alkali to lower the interfacial tension and improve partition coefficient is more significant. The mi- celles formed by surfactants could be disaggregated because of adding alkali, so the size of micelles decreases and the number of mono-surfactants increases, then more surfactant molecules move to the interface of oil/surfactant system and the adsorption of surfactants at oil-water interfaces increases, which can lead to the decrease of IFT.
Bibliography:alkali metal, heavy alkylbenzene sulfonates, interfacial tension, partition coefficient, micelles
31-1547/O6
Liu, Bixin HOU, Jirui Tang, Hongjiao Xu, Haixia Zheng, Zigang a Enhanced Oil Recovery Center, China University of Petroleum （Beijing）, Beijing 102249, China b Key Laboratory of Petroleum Engineering of Ministry of Education, China University of Petroleum （Beijing）, Beijing 102249, China
Experimental studies were conducted to explore the fundamental mechanisms of alkali to lower the interfacial tension of oil/heavy alkylbenzene sulfonates （HABS） system. Sodium hydroxide was used as the strong alkali chemical to investigate the interracial tension （IFT） of oil/HABS system. The influences of salt and alkali on the interracial activity were studied by the measurement of interfacial tension and partition coefficient. Moreover, the al- kali/surfactant solutions were measured by dynamic laser scattering. The results showed that compared with the salt, the function of alkali to lower the interfacial tension and improve partition coefficient is more significant. The mi- celles formed by surfactants could be disaggregated because of adding alkali, so the size of micelles decreases and the number of mono-surfactants increases, then more surfactant molecules move to the interface of oil/surfactant system and the adsorption of surfactants at oil-water interfaces increases, which can lead to the decrease of IFT.
the National Basic Research Program of China - No. 2005CB221303
istex:6B9FDE01FF232FF7BCAA7707E894F4910DD52DBE
ark:/67375/WNG-XNC31L07-D
ArticleID:CJOC201180397
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.201180397