The use of anion‐exchange resins for the removal and recovery of non‐hydrocarbon constituents from hydrocarbons. I. Carboxylic acids and phenols

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Abstract
An examination has been made of the adsorption of phenols and carboxylic acids (including naphthenic acids) from hydrocarbon solvents, especially benzene, using a strongly basic anion‐exchange resin in hydroxide, chloride and bicarbonate forms after pretreatment of the water‐wet resin with (A) benzene, (B) methanol and (C) methanol followed by drying, resins treated as (B) and (C) being then treated with benzene.The possibilities of the uses of these pretreated resins for separation of phenols from carboxylic acids or fractionation of mixtures of phenols or acids are discussed. Application of the procedure to the separation of higher‐alkylated phenols from lubricating oil is described.

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