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首页> 外文期刊>Journal of Applied Polymer Science >PERVAPORATION SEPARATION OF METHYL TERT-BUTYL ETHER/METHANOL MIXTURES USING A HIGH-PERFORMANCE BLENDED MEMBRANE
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PERVAPORATION SEPARATION OF METHYL TERT-BUTYL ETHER/METHANOL MIXTURES USING A HIGH-PERFORMANCE BLENDED MEMBRANE

机译：高性能共混膜的甲基叔丁基-丁基醚/甲醇混合物的渗透分离

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摘要

For the separation of methyl tert-butyl ether (MTBE) and methanol mixtures, we investigated the pervaporation performance of a blend membrane made from cellulose acetate and cellulose acetate hydrogen phthalate. At first the influence of the blend composition was studied with a certain feed mixture. We found that all the tested membranes permeate methanol preferentially. The selectivity increases and the permeation rate decreases with increasing cellulose acetate content in the blend. Therefore, an optimal blend composition of 30 wt % in cellulose acetate was chosen to evaluate the influence of the feed composition and the experimental temperature on the pervaporation performance. When the feed temperature or the methanol content in the feed increases, the permeation rates are greatly enhanced and the selectivity decreases. However, the temperature effect is more significant at low methanol content in the feed and becomes negligible at high methanol content in the feed where plasticity effects prevail. A comparison, carried out with all the membranes until now used for the separation of MTBE/methanol mixtures, showed that the blended membrane studied in this present work presents good permselective properties. (C) 1997 John Wiley & Sons, Inc. [References: 17]
机译：为了分离甲基叔丁基醚（MTBE）和甲醇混合物，我们研究了由醋酸纤维素和醋酸纤维素邻苯二甲酸氢盐制成的共混膜的全蒸发性能。首先，研究了某种饲料混合物对共混物组成的影响。我们发现所有测试的膜优先渗透甲醇。随着共混物中乙酸纤维素含量的增加，选择性增加并且渗透速率降低。因此，选择乙酸纤维素中30wt％的最佳共混物组成来评价进料组成和实验温度对全蒸发性能的影响。当进料温度或进料中甲醇含量增加时，渗透速率大大提高并且选择性降低。然而，当进料中甲醇含量低时，温度影响更为显着，而当进料中甲醇含量较高时（可塑性作用占优势），温度影响可忽略不计。到现在为止，用于分离MTBE /甲醇混合物的所有膜均进行了比较，结果表明，本研究中研究的共混膜具有良好的选择性渗透性能。 （C）1997 John Wiley＆Sons，Inc. [参考：17]

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