Effect of Sodium Carbonate on the Cloud Point in Alkyl Ether/Brine Systems: Apparent Relation with Dynamic Interfacial Tension Minimum

Moundher Hadji; Mohamed Aoudia; Adil Al-Rubkhi; Rashid S. Al-Maamari; Amel Hadj-Ziane-Zafour

doi:10.1007/s11743-016-1870-3

Effect of Sodium Carbonate on the Cloud Point in Alkyl Ether/Brine Systems: Apparent Relation with Dynamic Interfacial Tension Minimum

Moundher Hadji, Mohamed Aoudia^*, Adil Al-Rubkhi, Rashid S. Al-Maamari, Amel Hadj-Ziane-Zafour

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The effect of Na₂CO₃ on the cloud point in Na₂CO₃/surfactant/brine was investigated using two series of nonionic surfactants, C₁₃EO_x and C₁₇EO_x. The cloud point, T_cp, was found to decrease linearly with increasing Na₂CO₃ concentration. This was attributed to Na⁺ and particularly to CO₃ ²⁻salting-out effect. The slope a = dTcp/d[Na₂CO₃] became more and more negative as the degree of ethoxylation is increased, suggesting that the higher the number of ethylene oxide (EO) groups the stronger is the cloud point depression for a given increment in Na⁺and CO₃ ²⁻ions in solution. This was also illustrated by the linear variation of ΔT_cp = T_cp,0 − T_cp,[Na2CO3] with the surfactant degree of ethoxylation.

Original language	English
Pages (from-to)	1223-1229
Number of pages	7
Journal	Journal of Surfactants and Detergents
Volume	19
Issue number	6
DOIs	https://doi.org/10.1007/s11743-016-1870-3
Publication status	Published - Nov 1 2016

Keywords

Cloud point
Enhanced oil recovery
Nonionic surfactant
Salting-out effect
Soap

ASJC Scopus subject areas

Chemical Engineering(all)
Surfaces, Coatings and Films
Physical and Theoretical Chemistry

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Effect of Sodium Carbonate on the Cloud Point in Alkyl Ether/Brine Systems : Apparent Relation with Dynamic Interfacial Tension Minimum. / Hadji, Moundher; Aoudia, Mohamed; Al-Rubkhi, Adil; Al-Maamari, Rashid S.; Hadj-Ziane-Zafour, Amel.

In: Journal of Surfactants and Detergents, Vol. 19, No. 6, 01.11.2016, p. 1223-1229.

Research output: Contribution to journal › Article › peer-review

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abstract = "The effect of Na2CO3 on the cloud point in Na2CO3/surfactant/brine was investigated using two series of nonionic surfactants, C13EOx and C17EOx. The cloud point, Tcp, was found to decrease linearly with increasing Na2CO3 concentration. This was attributed to Na+ and particularly to CO3 2−salting-out effect. The slope a = dTcp/d[Na2CO3] became more and more negative as the degree of ethoxylation is increased, suggesting that the higher the number of ethylene oxide (EO) groups the stronger is the cloud point depression for a given increment in Na+and CO3 2−ions in solution. This was also illustrated by the linear variation of ΔTcp = Tcp,0 − Tcp,[Na2CO3] with the surfactant degree of ethoxylation.",

keywords = "Cloud point, Enhanced oil recovery, Nonionic surfactant, Salting-out effect, Soap",

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