Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (7): 1122.

• Articles • Previous Articles     Next Articles

Studies on Desalination by Pervaporation

PENG Ping, ZHANG Xiao-Ling, LI Xiao-Dong   

  1. Department of Material Science, National University of Defence and Technology, Changsha, 410073
  • Received:1994-11-30 Revised:1995-03-16 Online:1995-07-24 Published:1995-07-24

Abstract: Desalination by pervaporation was investigated, in which an asymmetric membrane with non-porous layer was used. This kind of membrane was prepared from alloy of PVA and PEG crosslinked by aldehydes and sodium salt. The desalination of 3.5% and 8% NaCl solution with the membrane by pervaporation at 55℃ and 5. 00 kPa(downstream pressure) resulted in the single-stage salt rejection of 99% and the water flux of 14 kg/h·m2. The concentration of NaCl solution has a bit of effect on seperation properties.

Key words: Pervaporation, Desalination, Membrane

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