Abstract
Alkylbenzenesulfonates, which have been widely used for industrial and household detergents, contain ortho-para isomer, and it is difficult to separate them each other. In this paper, their separation by the solubility difference of their lead salt in 95% ethanol and their properties were studied with the following results.
1. By infrared spectra and dipole moments, it was confirmed that soluble lead salt was rich in ortho compound and insoluble lead salt was rich in para, but their purities were not determined. There was no difference between their NMR spectra.
2. Solubilizing power and solubility in absolute ethanol of o-DBSNa were much greater than those of p-DBSNa, but there was very slightly difference between their surface tensions, wetting powers and foaming powers.
3. Regarding the actions on micro-organisms (bacteriostatic action and biological degradation), there was no difference between ortho-para isomer of branched alkylbenzenesulfonate.
