渗透汽化法分离二氧六环－水混合物
Dioxane-Water Mixtore Separation by Pervaporation
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摘要: 研究了二氧六环一水混合物在ＰＶＡ（聚乙烯酸）－ＰＡＮ（聚丙烯腈）复合膜中的渗透汽化分离性能。结果表明透过速率Ｑ和分离系数α均随料液温度的提高而增大。α随料液中二氧六环浓度的提高而增大，Ｑ的变化趋势相反．有代表性的数据是在９０℃对９５％的二氧六环水溶液，α可达１９８１，Ｑ＝７３．８ｇ／ｍ２·ｈ．在低浓度二氧六环溶液时扩散过程对选择性起主要作用。而高浓度时溶解选择性是主要的，随着分离温度的提高，扩散或溶解均提高了选择性。Abstract: The separation of dioxane-water mixture by the Pervaporation processes through PVA-PAN composite membranes was investigated. Results are presented for membranes which are preferentially Permeable for water.Both the permeability and the selectivity to wate
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