Membrane pervaporation process for diacetone alcohol - Water separations

C. Stewart Slater, Timothy Schurmann, Joshua MacMillian, Angela Zimarowski

Research output: Contribution to conferencePaperpeer-review

Abstract

Membrane pervaporation is a very effective technology for organic solvent-water separations in specialty chemical manufacture. It has the ability to perform solvent dehydrations and produce solvents of high purity without complex distillations. With the proper selection of membranes, pervaporation can be used in many applications from organic recovery from dilute aqueous process streams to final solvent purification. Pervaporation has been successfully utilized in the dehydration of diacetone alcohol (DAA)-water mixtures. Studies have been conducted to examine the effect of various operating parameters such as feed concentration, temperature, and permeate-side pressure on flux and selectivity. The use of a polyvinylalcohol membrane was quite selective for the parameters studied. At benchmark processing conditions of feed concentration of 90% DAA, 50°C and 2 mmHg (abs) permeate-side pressure, water selectivity was 169.9 and total flux was 0.26 kg/m2-hr. Our studies examined feed concentrations over the range of 1-50% w/w water in DAA. Feed temperature affected flux in an exponential manner; as temperature was increased, so too did the flux. Decreasing the permeate side pressure showed no significant effect on the quality of separation, but as pressure increased, flux decreased exponentially. A selection of Sulzer dehydration membranes were also compared over benchmark conditions. Data correlated well, and empirical models were developed. Scale-up calculations were performed to determine needed membrane area for a commercial dehydration. The model we developed predicts a membrane area of 85 m2 is needed to achieve a final product purity of 99% DAA from a feed of 90% DAA.

Original languageEnglish (US)
Number of pages1
StatePublished - Dec 1 2005
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Other

Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
CountryUnited States
CityCincinnati, OH
Period10/30/0511/4/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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