Abstract
Solubilities and permeabilities of ethylene and propylene were examined for a liquid membrane consisting of polyethylene glycol containing a series of transition metal ions. In the Rh 3+—added system, olefin uptake by the metal ion occurred reversibly and the permselectivity of olefin gas against N 2 was improved. Addition of KNO 3 to the Rh 3+—PEG system resulted in further enhancement of the permselectivity. Results of sorption and permeation measurements demonstrated that the olefin transport mediated by Rh 3+ becomes more predominant as a result of the salting-out effect induced by the added salt.
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