Dehydration of Acetic Acid/Water Mixture by Pervaporation through a Chemically Modified Poly(4-methyl-l-pentene) Membrane
- 1 January 1998
- journal article
- research article
- Published by Taylor & Francis in Separation Science and Technology
- Vol. 33 (2) , 187-200
- https://doi.org/10.1080/01496399808544763
Abstract
Dehydration of a water-acetic acid mixture by pervaporation through a modified poly(4-methyl-I-pentene) (TPX) membrane chemically grafted onto glycidyl meth-acrylate (TPX-g-PGMA) was investigated. Sulfonation was also used to improve the separation performance of the TPX-g-PGMA membrane. Investigations focused on the effects of feed compositions, feed temperature, degree of grafting, and downstream pressure. Compared with pure TPX membrane, the TPX-g-PGMA membrane and the sulfonated TPX-g-PGMA membrane (TPX-g-PGMAS) effectively improved pervaporation performances. Optimum pervaporation results were obtained using a TPX-g-PGMAS membrane with 13.7% degrees of grafting, giving a separation factor of 73 and a permeation rate of 125 g/m2-h for an 84 wt% aqueous acetic acid solution.Keywords
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