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Citation: Zhang Guibao, Fu Shengquan, Zhang Keda. Alkali-Metal Ion Improved PVA Pervaporation Membrane[J]. Chinese Journal of Applied Chemistry, ;1994, 11(2): 81-84. shu

Alkali-Metal Ion Improved PVA Pervaporation Membrane

1.
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received Date: 20 July 1993
Available Online: 24 November 1993
Fund Project:

The separation of ethanol/water mixture by pervaporation by crosslinked PVA-MA membrane containing LiCl,NaCl and KCl has been investigated.The flux increased markedly when salt content was less than 6 wt% in the dry membrane,and the separation factor increased when ethanol concentration in feed solution was high.The DSC results showed that the membranes adsorbed 5%~8wt% of free water from ethanol/water mixture (50/50wt/wt),which is hardly observed by weighing method.
- pervaporation,
- membrane,
- poly(vinyl alcohol),
- ethanol separation
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