Effect of added salts in water on the hydrophile-lipophile balance of nonionic surfactants: the effect of added salts on the phase inversion temperature of emulsions
Although an HLB-value is assigned to a definite surfactant, the real hydrophile-lipophile balance (HLB) of surfactant at the oil-water interface changes with the amount and kinds of added salts in water as well as with the types of oils. On the other hand, the phase inversion temperature (PIT) of emulsions accurately reflects that the real HLB of surfactants in a given system changes sensitively with the amount and kinds of added salts. The effect of added salts, acid, and alkali on the hydrophile-lipophile balance of nonionic surfactant has been studied from the measurements of the effect of these additives on the PIT of emulsions and on the cloud points of the surfactant solutions. It was found, for example, that both the PIT of the emulsion studied and the cloud point of an aqueous solution of polyoxyethylene (9.7) nonylphenylether (5% by wt per system) were depressed about 14/sup 0/C in the presence of 6% by wt of sodium chloride in water. This means that the HLB value of the surfactant was depressed about 0.8 to 1.0 unit in the solution. (10 refs.)
- Research Organization:
- Yokohama National Univ.
- OSTI ID:
- 5002186
- Journal Information:
- J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 32:4; ISSN JCISA
- Country of Publication:
- United States
- Language:
- English
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020300* -- Petroleum-- Drilling & Production
ADDITIVES
ALKALI METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
DISPERSIONS
EMULSIONS
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
MIXTURES
OIL WELLS
PETROLEUM
SALTS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SURFACTANTS
WATERFLOODING
WELLS
WETTABILITY