THE SEPARATION OF WATER AND ALCOHOL BY PERVAPORATION WITH PVA/PAN COMPOSITE MEMBRANE

SHI Yanqiao; CHEN Guanwen

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THE SEPARATION OF WATER AND ALCOHOL BY PERVAPORATION WITH PVA/PAN COMPOSITE MEMBRANE

Research Article | 更新时间：2021-03-19

- THE SEPARATION OF WATER AND ALCOHOL BY PERVAPORATION WITH PVA/PAN COMPOSITE MEMBRANE
- Acta Polymerica Sinica Issue 2, Pages: 210-215(1996)
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- Published：20 April 1996，
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SHI Yanqiao, CHEN Guanwen. THE SEPARATION OF WATER AND ALCOHOL BY PERVAPORATION WITH PVA/PAN COMPOSITE MEMBRANE. [J]. Acta Polymerica Sinica (2):210-215(1996)
DOI：

SHI Yanqiao, CHEN Guanwen. THE SEPARATION OF WATER AND ALCOHOL BY PERVAPORATION WITH PVA/PAN COMPOSITE MEMBRANE. [J]. Acta Polymerica Sinica (2):210-215(1996) DOI：

摘要

制备了聚乙烯醇（ＰＶＡ）／聚丙烯睛（ＰＡＮ）渗透汽化复合膜

研究了交联剂用量、底膜结构、进料液组成、操作温度等因素对膜的渗透汽化性能的影响．发现ＰＶＡ／ＰＡＮ复合膜对水／醇混合液表现为水优先透过

进料液中乙醇浓度在６０～９９ｗｔ％的范围内

渗透通量Ｊｔ与温度之间符合Ａｒｒｈｅｎｉｕｓ关系

选择分离系数αＷ／Ｅ也随温度上升而增大．进料液为９５ｗｔ％的乙醇／水混合液时

７５℃下Ｊｔ高达３００～４５０ｇ／ｍ２ｈ

αＷ／Ｅ为８００～１１００．对异丙醇／水、异丁醇／水及甘油／水混合体系

复合膜显示出更为优秀的透过、分离性能．就膜的化学、物理结构与其渗透汽化性能间的关系进行了讨论．

Abstract

Composite membranes with a poly (vinylalcohol) (PVA) layer coated on polyacrylonitrile(PAN) support membranes were evaluated for pervaporation separation of water-alcohol mixtures. The PVA /PAN composite membranes as prepared were water permselective for the ethanol concentration range of 60 to 99wt% in the feed

and the separation factors were 800 ￣ 1100

permeate flux was 300 ￣ 450g/m2hat 75℃ (for ethanol concentration in feed 95wt%). The dependence of the permeate flux on temperature was consistent with the Arrhenius relationship

and the separetion factor and permeate flux was increased with increasing operation temoerature. PVA/PAN composite membrane has excellent permselectivity for separating mixutures of iso-propanol(or iso-butyl alcohol

glycerin)and water.

关键词

聚乙烯醇均质膜复合膜渗透汽化特性

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