Effect of sodium chloride on the solubility of ethane in micellar solutions of sodium dodecyl sulfate

Journal Article · Wed Jul 01 00:00:00 EDT 1981 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(81)90151-X· OSTI ID:5587599

Hoskins, J C; King, Jr, A D

Experiments have been carried out to determine the solubility of ethane in aqueous solutions of sodium dodecyl sulfate containing sodium chloride. Addition of successive increments of NaCl to a micellar solution of sodium dodecyl sulfate (SDS) causes a small increase in gas solubility at low salt concentrations (< 0.1 M). However, at higher salt concentrations NaCl suppresses the solubility of ethane. These salt effects are found to be independent of surfactant concentration. The variation in ethane solubility with salt concentration is interpreted as reflecting the combined effects of an increase in micellar SDS at the expense of the monomeric form which occurs at low salt concentrations and the salting out of ethane from the external aqueous phase. The intramicellar solubility of ethane is not affected by added salt, even in solutions having very high NaCl concentrations (> 0.6 M) which are thought to contain SDS in the form of large aggregates which are thermodynamically unstable with respect to the hydrated solid state.

• OSTI ID: 5587599
• Journal Information: J. Colloid Interface Sci.; (United States), Vol. 82:1
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
DISPLACEMENT FLUIDS
SOLVENT PROPERTIES
ETHANE
SOLUBILITY
MICELLAR SYSTEMS
CATALYTIC EFFECTS
QUANTITY RATIO
SODIUM CHLORIDES
SODIUM SULFATES
ALKALI METAL COMPOUNDS
ALKANES
CHLORIDES
CHLORINE COMPOUNDS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SODIUM COMPOUNDS
SULFATES
SULFUR COMPOUNDS
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