TY - JOUR
T1 - Effect of Sodium Carbonate on the Cloud Point in Alkyl Ether/Brine Systems
T2 - Apparent Relation with Dynamic Interfacial Tension Minimum
AU - Hadji, Moundher
AU - Aoudia, Mohamed
AU - Al-Rubkhi, Adil
AU - Al-Maamari, Rashid S.
AU - Hadj-Ziane-Zafour, Amel
N1 - Publisher Copyright:
© 2016, AOCS.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - 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 CO32−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 CO32−ions in solution. This was also illustrated by the linear variation of ΔTcp = Tcp,0 − Tcp,[Na2CO3] with the surfactant degree of ethoxylation.
AB - 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 CO32−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 CO32−ions in solution. This was also illustrated by the linear variation of ΔTcp = Tcp,0 − Tcp,[Na2CO3] with the surfactant degree of ethoxylation.
KW - Cloud point
KW - Enhanced oil recovery
KW - Nonionic surfactant
KW - Salting-out effect
KW - Soap
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U2 - 10.1007/s11743-016-1870-3
DO - 10.1007/s11743-016-1870-3
M3 - Article
AN - SCOPUS:84986325492
SN - 1097-3958
VL - 19
SP - 1223
EP - 1229
JO - Journal of Surfactants and Detergents
JF - Journal of Surfactants and Detergents
IS - 6
ER -