Patent ID: 9227854
Filing Date: 2016-01-05
CPC Classification: B01D,C02F,C07C

Claim Text:
1. A process for purifying a liquid stream comprising an aqueous phase and optionally an organic phase, said aqueous phase comprising polyaromatics in solution in water, the process comprising: a) sending the liquid stream to a mixing tank in which is introduced an effective amount of an aromatic component to produce a mixture of an organic phase and of an aqueous phase, wherein the effective amount is sufficient to cause migration of the polyaromatics to the organic phase, wherein the aqueous phase comprises 75 to 100 wt % of the liquid stream, and wherein the aromatic component comprises a mixture of ethylbenzene with benzene, toluene, or combinations thereof; b) sending the mixture recovered at step a) to a decanter to recover a clean aqueous phase and an organic phase; and c) passing the clean aqueous phase leaving the decanter of step b) through a stripper to remove a substantial part of any remaining organic component, wherein the polyaromatics are condensed heavy components and the result of polymerization of at least a divinylaromatic monomer and optionally a monovinylaromatic monomer or any monomer able to copolymerize with the divinylaromatic monomer.