THE SOLUBILITY OF ALKALI-METAL DINONYLNAPTHALENE SULFONATES IN VARIOUS TYPES OF SOLVENT, AND A THEORY FOR THE SOLUBILITY OF OIL-SOLUBLE SOAPS.
Abstract
The solubility of the alkali-metal (group I) dinoylnaphthalene sulfonates in low-polarity solvents is parallel to that of dinonylnaphthalene in the sam3e solvents. This indicates that, theouter hydrocarbon sheath of the micelle determines compatibility with a solvent. The solubility behavior in nonpolar solvents is most readily correlated by comparison of the Hildebrand solubility parameter of the solvent with that estimated for the hydrocarbon exterior of the micelle. In systems showing limited solubility the data indicate that (1) the condensed soap phase behaves as viscous liquid and (2) the equilibrium is characteristic of liquid/liquid system in which the limited solubility of the two components in each other increases with rising temperature to a critical solution temperature; above this temperature the soap and solvent are miscible in all proportion. For ordinary oilsoluble soaps in common hydrocarbons, the critical solution temperature lies well room temperature. Micelle size in lowpolarity solvents decreses as the solubility parameter increases. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 11, 1963
- Accession Number
- AD0424577
Entities
People
- C. R. Singleterry
- R. C. Little
Organizations
- United States Naval Research Laboratory