Jin Yong Bae

Reactive polymer membranes containing cuprous complexes in olefin/paraffin separation

The reduction of Cu(BF4)2·xH2O in 1 wt% poly(vinyl pyrrolidone)–methanol solution with trimethyl phosphite produced a solution containing cuprous complexes; the membrane prepared from this solution showed a maximum selectivity of 10 for propylene over propane at room temperature.

Multi-functional zwitterionic compounds as new membrane materials for separating olefin–paraffin mixtures

Various types of multi-functional zwitterionic compounds containing both ester and sulfonate groups were prepared and their silver nitrate salts were tested as carriers for facilitated olefin transport membranes in the separation of ethylene–ethane and propylene–propane mixtures. Ester group-containing multi-functional zwitterionic silver compounds exhibited much higher performances in comparison with methyl group-containing zwitterionic compounds. A FT-IR study showed that ester-containing zwitterionic compounds interact with silver ions through both sulfonate and ester functional groups.