Study on Separation of Heteroatomic Compounds (III)

Extraction of Phenols in Naphthas with Sodium Alkylbenzenesulfonate Aqueous Solution

Abstract

-Phenols in coal-derived naphthas were selectively and efficiently separated by extraction with various kinds of sodium alkylbenzenesulfonate aqueous solu-tion.
The partition coefficient (K) of phenols was exponentially increased with the increases in the concentration and alkyl carbon number of the surfactants, but was lowered by the presence of oxygen compounds other than phenols in naphtha.
The effect of methanol addition was significant and the combined use of methanol and the surfactant showed synergistic effect for the extraction of phenols. The extraction sol-vent was repeatedly used without lowering the extraction efficiency. The transfer of hydro-carbon into water phase and the contamination of the surfactant into oil phase were very trace.