SEPARATION OF AROMATICS BY VAPOR PERMEATION THROUGH SOLVENT SWOLLEN MEMBRANE
A vapor permeation process for aromatics separation from a hydrocarbon mixture was studied by means of the simultaneous permeation of dimethylsulfoxide vapor as an agent for membrane swelling and preferential permeation of aromatics. The separation performance of the process was demonstrated by a polyvinylalcohol membrane for mixed vapors of benzene/cyclohexane, xylene/octane and a model gasoline. The aromatic vapors preferentially permeated from these mixed vapor feeds. The separation factor was over 10. The separation mechanism of the process mainly depends on the relative solubility of the vapors between aromatics and other hydrocarbons in dimethylsulfoxide.
- Journal of chemical engineering of Japan
Journal of chemical engineering of Japan 28(6), 679-683, 1995-12-01
The Society of Chemical Engineers, Japan