Preparation of pervaporation membranes. Final report on Phase 1. Report for 1 January-31 October 1989

Technical Report · Sun Oct 15 04:00:00 EDT 1989

OSTI ID:6708434

Baker, R W; Athayede, A L; Castro, R

The goal of the Phase 1 program was to prepare improved pervaporation membranes for the separation of polar solvents from water. Membranes were prepared from modified polysiloxanes and other rubbery materials. These membranes were tested with ethanol/water and ethyl acetate/water mixtures to determine their performance in a pervaporation test loop. Polydimethylsiloxane with polyamide blocks was the most selective material for ethanol/water separation. Polybutadiene membranes were preferred for ethyl acetate/water separation. The performance of the polydimethysiloxane-polyamide block copolymer demonstrates that the inclusion of hydrophilic groups into polydimethylsiloxane increases the ethanol/water selectivity, but the improvement is not significant. Testing of polyvinylmethylsiloxane membranes indicated that the degree of cross-linking in a polysiloxane membrane has a significant effect on ethanol/water selectivity. A highly cross-linked siloxane has a much lower ethanol/water selectivity than a less cross-linked material.

• Research Organization: Membrane Technology and Research, Inc., Menlo Park, CA (United States)
• OSTI ID: 6708434
• Report Number(s): PB-93-149789/XAB; CNN: NSF/ISI88-61436
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ACETATES
ALCOHOLS
CARBOXYLIC ACID SALTS
CHEMICAL REACTIONS
CROSS-LINKING
DISPERSIONS
ETHANOL
FEASIBILITY STUDIES
FILTERS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
MATERIALS
MEMBRANES
MIXTURES
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE TESTING
POLYMERIZATION
SEPARATION PROCESSES
SILOXANES
SOLVENTS
TESTING
WATER