| PVA/PVP共混膜渗透汽化分离甲醇/醋酸甲酯的研究 |
| 作者: 宁波大学材料科学与化学工程学院,宁波 315211 |
| 单位: 宁波大学材料科学与化学工程学院,宁波 315211 |
| 关键词: 渗透汽化;PVA;PVP;甲醇;醋酸甲酯 |
| DOI号: |
| 分类号: TQ028.8 |
| 出版年,卷(期):页码: 2010, 30(6):0-0 |
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摘要: |
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摘要:采用4,4’-双叠氮芪-2,2’-二磺酸钠(DAS)交联的聚乙烯醇(PVA)/聚乙烯吡咯烷酮(PVP)共混膜,对渗透汽化分离甲醇/醋酸甲酯混合物进行了研究。考察了交联剂DAS的含量、共混膜的组成、操作温度和料液组成对膜分离性能的影响规律。当DAS与共混膜中PVP质量比为1∶3时,PVP交联效果理想,共混膜具有较好的渗透汽化分离系数。随着共混膜中PVP含量的增加,膜的渗透通量逐渐增大,而分离系数先增大后减小。当操作温度为35℃、料液中甲醇含量为20wt%时,含30wt%PVP的共混膜对甲醇/醋酸甲酯的分离系数达到了17.7。随着操作温度的升高、料液中甲醇含量的增大,膜的通量逐渐增大,分离系数逐渐减小。实验结果表明,该共混膜能有效分离甲醇/醋酸甲酯二元共沸物。
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Abstract: Poly(vinyl alcohol) (PVA)/Poly(vinyl pyrrolidone) (PVP) blend membranes crosslinked with 4,4’-diazostilbene-2,2’-disulfonic acid disodium salt were prepared and used to separate methanol/methyl acetate mixtures by pervaporation. The effects of DAS content, blending composition, operating temperature and feed composition were investigated. WhenDAS/PVP ratio was 1∶3,PVP was crosslinked well and the membrane had a good separation factor. With the increasing of the PVP content in the membrane, permeation flux and separation factor increased and then decreased. Membrane containing 30% PVP exhibited good performance and gave the highest separation factor 17.7. With increasing temperature and methanol concentration in feed, the flux increased and the separation factor decreased.
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基金项目: |
| 浙江省自然科学基金(Y407353) |
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作者简介: |
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Abstract: Poly(vinyl alcohol) (PVA)/Poly(vinyl pyrrolidone) (PVP) blend membranes crosslinked with 4,4’-diazostilbene-2,2’-disulfonic acid disodium salt were prepared and used to separate methanol/methyl acetate mixtures by pervaporation. The effects of DAS content, blending composition, operating temperature and feed composition were investigated. WhenDAS/PVP ratio was 1∶3,PVP was crosslinked well and the membrane had a good separation factor. With the increasing of the PVP content in the membrane, permeation flux and separation factor increased and then decreased. Membrane containing 30% PVP exhibited good performance and gave the highest separation factor 17.7. With increasing temperature and methanol concentration in feed, the flux increased and the separation factor decreased.
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