Calcium effect on the solubility of sodium dodecyl sulfate in sodium chloride solutions
Interactions between calcium ions and anionic surfactants have recently attracted increased interest, particularly because of the development of enhanced oil recovery through the use of micellar solutions. The brine in crude oil reservoirs always contains a certain amount of polyvalent ions, especially calcium ions, which have pronounced effects on the properties of micellar solutions, varying with electrolyte concentration and surfactant type. To date, the surfactants most often used are anionic. Precipitation of anionic surfactants with calcium ions was investigated. It was found that surfactant precipitation is governed by a given mechanism when the supernatant liquid is a micellar solution, and by another when it is not. This work discusses the results of a series of experiments which indicate that this difference is a function of sodium chloride concentration. 10 references.
- OSTI ID:
- 5426638
- Journal Information:
- J. Colloid Interface Sci.; (United States), Vol. 92:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DISPLACEMENT FLUIDS
CHEMICAL PROPERTIES
MICROEMULSION FLOODING
OIL WELLS
BRINES
CALCIUM COMPOUNDS
ENHANCED RECOVERY
MICELLAR SYSTEMS
PETROLEUM
RESERVOIR ROCK
SURFACTANTS
ALKALINE EARTH METAL COMPOUNDS
ENERGY SOURCES
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
MISCIBLE-PHASE DISPLACEMENT
RECOVERY
WELLS
020300* - Petroleum- Drilling & Production