John W. Frankenfeld

Extraction of Copper by Liquid Membranes

Abstract Important variables governing the permeation of copper ion through liquid membranes and their effects on the separation process are described. These variables are membrane viscosity, treatment ratio (volume ratio of emulsion to feed in mixer), complexing agent concentration, internal droplet size, internal phase leakage, and copper concentration in the internal phase. The information is needed for scaling-up of equipment and further process development. The economic evaluation based on bench-scale pilot plant runs shows this process is 40% cheaper than solvent extraction.

Potential use of Liquid Membranes for Emergency Treatment of Drug Overdose

AbstractSeveral liquid membrane formulations were evaluated for the absorption of model drugs from two different donor solutions. Up to 95% of both phenobarbital and aspirin (acetylsalicylic acid) were removed from pH 2 donors and more than 85% of the former from a pH 7 donor in