Pervaporation separation of ethanol-water mixtures using polyethylenimine composite membranes

Patent · Wed Dec 31 23:00:00 EST 1986

OSTI ID:866224

Neidlinger, Hermann H ^[1]; Schissel, Paul O ^[2]; Orth, Richard A ^[3]

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1. Lakewood, CO
2. Golden, CO
3. Denver, CO

Synthetic, organic, polymeric membranes were prepared from polyethylenimine for use with pervaporation apparatus in the separation of ethanol-water mixtures. The polymeric material was prepared in dilute aqueous solution and coated onto a polysulfone support film, from which excess polymeric material was subsequently removed. Cross-links were then generated by limited exposure to toluene-2,4-diisocyanate solution, after which the prepared membrane was heat-cured. The resulting membrane structures showed high selectivity in permeating ethanol or water over a wide range of feed concentrations.

• Research Organization: MIDWEST RESEARCH INSTITUTE
• DOE Contract Number: AC02-83CH10093
• Assignee: United States Department of Energy (Washington, DC)
• Patent Number(s): US 4659590
• OSTI ID: 866224
• Country of Publication: United States
• Language: English

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