Yi. Korenman et al., EXTRACTIVE RECOVERY OF NITROPHENOL, NITROSOPHENOL, AND AMINOPHENOL BYETHYLENE-GLYCOL ETHERS, Russian journal of applied chemistry, 68(7), 1995, pp. 960-963
New extraction systems based on ethylene glycol ethers are proposed fo
r extractive recovery of nitrogen-containing phenols from aqueous medi
a. The conditions of formation of two liquid phases when salt (ammoniu
m sulfate) is introduced were investigated by plotting ternary solubil
ity diagrams. Recommendations on techniques allowing nearly complete r
ecovery (95-99%) of 20 nitrogen-containing phenols from aqueous media
are given.