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A Normalized Hydrophilic–Lipophilic Deviation Expression HLDN Is Necessary to Avoid Confusion Close to the Optimum Formulation of Surfactant-Oil–Water Systems
Journal of Surfactants and Detergents ( IF 1.6 ) Pub Date : 2021-05-31 , DOI: 10.1002/jsde.12518
Jean Louis Salager 1
Affiliation  

The physicochemical conditions to attain a minimum interfacial tension between oil and water were intensively studied in the 1970s when the chemical-enhanced oil recovery became an emergency with the increase in petroleum cost. Correlations between the formulation variables (salinity, oil nature, surfactant and co-surfactant nature, temperature, and pressure) required to attain a minimum interfacial tension or a three-phase behavior, so-called optimum formulation, were related to the chemical potential concept in the late 1970s. They were then transformed in a generalized hydrophilic–lipophilic deviation (HLD) expression in 2000. Some confusion in the ranking and classification of the surfactant parameters with different scales has occurred in recent years. The aim here is to propose a normalized HLDN expression with the alkane carbon number (ACN) variable scale to clear up the current misunderstanding in the use of different HLD expressions. The use of a single HLDN expression for all systems improves the prediction of formulation effects, but does not eliminate the limitations due to the partitioning of species in surfactant mixtures.

中文翻译:

标准化的亲水-亲油偏差表达 HLDN 是必要的,以避免混淆接近表面活性剂-油-水系统的最佳配方

在 1970 年代,随着石油成本的增加,当化学提高采收率成为紧急情况时,对达到最小油水界面张力的物理化学条件进行了深入研究。达到最小界面张力或三相行为所需的配方变量(盐度、油性、表面活性剂和助表面活性剂性质、温度和压力)之间的相关性,即所谓的最佳配方,与化学势概念有关在 1970 年代后期。然后在 2000 年将它们转化为广义亲水亲油偏差 (HLD) 表达式。近年来,在不同尺度的表面活性剂参数的排序和分类中出现了一些混乱。这里的目的是提出一个归一化的 HLD N用烷烃碳数 (ACN) 变量标度来澄清当前在使用不同 HLD 表达式时的误解。对所有系统使用单一的 HLD N表达式可以提高对配方效果的预测,但并不能消除由于表面活性剂混合物中物质的分配而造成的限制。
更新日期:2021-05-31
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