Concentration of dilute acetone-water solutions using pervaporation

Journal Article · Mon Mar 01 00:00:00 EST 1993 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399308029237· OSTI ID:6725926

Hollein, M E; Hammond, M; Slater, C S ^[1]

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1. Manhattan College, Riverdale, NY (United States)

The separation of acetone-water mixtures by pervaporation has been studied. Four membranes were evaluated: a silicone composite (SC) membrane, a polydimethylsiloxane (PDMS) membrane, a polymethoxysiloxane (PMS), and a poly-ether-block-polyamide copolymer (PEBA) membrane. The silicone composite membrane exhibited a higher flux and selectivity than any of the other membranes studies. At a feed temperature of 50[degrees]C, a permeate-side pressure of 1 torr, and a feed concentration of 5.0%, the silicone composite membrane had a flux of 1.1 kg/m[sup 2][center dot]h and a selectivity of 50. The effects of temperature and permeate-side pressure on membrane transport were studied using the SC membrane. An increase in temperature increased the flux exponentially, but had little effect on selectivity. An analysis of the data shows that the trend agrees quite well with an Arrhenius-type relationship. As the permeate-side pressure increased, the flux decreased in a sigmoidal fashion over the range evaluated. Selectivity did not change significantly over the lower portion of the pressure range studied. The effect of feed concentration on flux and selectivity was also investigated. 30 refs., 11 figs.

• OSTI ID: 6725926
• Journal Information: Separation Science and Technology; (United States), Vol. 28:4; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACETONE
SEPARATION PROCESSES
MIXTURES
MEMBRANE TRANSPORT
DESIGN
WATER
ARRHENIUS EQUATION
CONCENTRATION RATIO
COPOLYMERS
MEMBRANES
SILICONES
SILOXANES
TEMPERATURE DEPENDENCE
DISPERSIONS
EQUATIONS
HYDROGEN COMPOUNDS
KETONES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SILICON COMPOUNDS
OXYGEN COMPOUNDS
POLYMERS
400105* - Separation Procedures