Accession Number : AD0659955

Title :   EFFECT OF THE CATION ON SOLUBILIZATION BY OIL-SOLUBLE SULFONATES AND THE APPLICABILITY OF THE MASS LAW,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Kaufman,Samuel

Report Date : 05 SEP 1967

Pagination or Media Count : 14

Abstract : The dinonylnaphthalene sulfonates of cesium, sodium, barium, magnesium, and zinc were studied as solubilizing agents for methanol, normal propylamine, and acetic acid in toluene. By a previously developed gas chromatographic technique, the extent of solubilization of the three species by each of the sulfonates was measured over the range of 0 to approximately 2-wt-% solubilizate. The mass law was shown to be consistent with the experimental observation that the concentration ratio of bound solubilizate to total solubilizer is dependent upon the free solubilizate concentration and independent of the solubilizer concentration. The data and theoretical considerations lead to the additional conclusions that the partition law is not universally applicable to solubilization, and that the size distribution of micelles is fixed by the free solubilizate concentration. The initial rate of interaction as a function of free solubilizate concentration usually increased with increasing electronegativity of the soap cation. The soaps of zinc and magnesium were exceptions when acetic acid was the solubilizate. This deviation is attributed to the covalent properties of these metals and the bifunctional reactivity of acetic acid. (Author)

Descriptors :   (*SURFACE ACTIVE SUBSTANCES, *SULFONATES), ORGANIC SOLVENTS, SOLUBILITY, COLLOIDS, CESIUM COMPOUNDS, SODIUM COMPOUNDS, BARIUM COMPOUNDS, MAGNESIUM COMPOUNDS, ZINC COMPOUNDS, CARBINOLS, AMINES, ACETIC ACID, TOLUENES, GAS CHROMATOGRAPHY, MOLECULAR ASSOCIATION

Subject Categories : Organic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE