Yi. Korenman et al., EXTRACTION OF ACETYLSALICYLIC AND SALICYLIC ACIDS FROM AQUEOUS-MEDIUM, Journal of applied chemistry of the USSR, 65(11), 1992, pp. 2165-2167
A method of concentration of acetylsalicylic and salicyclic acids with
a solution of trioctylphosphine oxide in hexane in the presence of va
rious salting-out agents has been investigated.