Compositions useful in liquid-liquid extraction processes for improving the taste of water-soluble surfactants, said composition comprising: from about 5% to about 60%, by weight of the composition, of water soluble surfactant; from about 10% to about 90%, by weight of the composition, of water; from about 10% to about 90%, by weight of the composition, of extraction solvent; at least 0.01%, by weight of the composition, of undesirable non-polar materials; wherein the extraction solvent is selected from solvents having individual Hansen solubility parameters of a dispersion force component (.sub.D) ranging from about 15 to about 17 (MPa).sup.0.5, a polar component (.sub.P) ranging from 0 to about 9 (MPa).sup.0.5 and a hydrogen bonding component (.sub.H) ranging from 0 to about 11 (MPa).sup.0.5.

The present disclosure relates to methods for treating a water zone of a subterranean formation by injecting a mixture including an anionic surfactant and an amine, followed by CO.sub.2, to reduce water production from the formation.

The present disclosure relates to methods for treating a water zone of a subterranean formation by injecting a mixture including an anionic surfactant and an amine, followed by CO.sub.2, to reduce water production from the formation.

A surfactant composition for a foamed sand including 80 to 99.8 mass % of a compound (A) represented by formula (1); 0.1 to 10 mass % of a compound (B) represented by formula (2); and 0.1 to 10 mass % of an amphoteric surfactant (C):
R.sup.1O-(EO).sub.nSO.sub.3M.sup.1(1)
wherein R.sup.1 represents a hydrocarbon group having 6 to 22 carbons, EO represents oxyethylene group, n is 1 to 10, and M.sup.1 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium;
R.sup.2OSO.sub.3M.sup.2(2)
wherein R.sup.2 represents a hydrocarbon group having 6 to 22 carbons, and M.sup.2 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium.

A surfactant composition for a foamed sand including 80 to 99.8 mass % of a compound (A) represented by formula (1); 0.1 to 10 mass % of a compound (B) represented by formula (2); and 0.1 to 10 mass % of an amphoteric surfactant (C):
R.sup.1O-(EO).sub.nSO.sub.3M.sup.1(1)
wherein R.sup.1 represents a hydrocarbon group having 6 to 22 carbons, EO represents oxyethylene group, n is 1 to 10, and M.sup.1 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium;
R.sup.2OSO.sub.3M.sup.2(2)
wherein R.sup.2 represents a hydrocarbon group having 6 to 22 carbons, and M.sup.2 represents an alkali metal, an alkaline earth metal, ammonium or an organic ammonium.

Present invention relates to a process for manufacturing emulsion composition which comprises an oil phase dispersed in a continuous water phase which is stabilized with a surfactant as an emulsifier. The present invention is on a method for producing an emulsion comprising one or more fatty alcohol, one or more oil liquid at 20 C. and one or more surfactant wherein one or more surfactant is added to the dispersion of one or more fatty alcohol and one or more oil liquid at 20 C. in water at a temperature of 50 C. or higher, preferably 60 C. or higher with the condition that the temperature of the dispersion is at least 10 C. higher than the melting point of fatty alcohol having the highest melting point, more preferably between 60 and 85 C. wherein the emulsion thus obtained does not comprise dispersed droplets with a volume size larger than or equal to 10 m measured directly without dilution of the emulsion at 20 C. measured with a laser particle size analyzer suitable therefore.