| DMF与CHCl_3混合液精馏分离工艺的研究 |
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| 引用本文： | 郑炳云,傅明连,董声雄.DMF与CHCl_3混合液精馏分离工艺的研究[J].莆田学院学报,2009,16(2). |
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| 作者姓名： | 郑炳云 傅明连 董声雄 |
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| 作者单位： | 1. 莆田学院,环境与生命科学系,福建,莆田,351100
2. 福州大学化学化工学院,福建,福州,350108 |
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| 基金项目： | 福建省教育厅A类项目 |
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| 摘 要： | 采用模拟的二甲基甲酰胺(DMF)与三氯甲烷(CHCl3)混合液(DMF质量分数为47%),通过精馏塔进行分离。当进料量为2L·h-1时,得出最佳的操作条件如下:进料状态为泡点进料,加料位置为第七块塔板进料,回流比为4。最终结果为:理论塔板数为4.5块,塔板效率为37.5%,塔顶产品DMF质量分数低于0.01%,塔底产品DMF质量分数达到96.03%。该新方法与传统的直接精馏法相比既能减少精馏能耗,又能回收利用DMF,还可使萃取剂CHCl3重复使用,对环境友好不造成污染。
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| 关 键 词： | DMF废水 三氯甲烷 精馏 |
Study on Distillation Separation of DMF and CHCl_3 Mixture |
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| ZHENG Bing-yun,FU Ming-lian,DONG Sheng-xiong.Study on Distillation Separation of DMF and CHCl_3 Mixture[J].journal of putian university,2009,16(2). |
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| Authors: | ZHENG Bing-yun FU Ming-lian DONG Sheng-xiong |
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| Institution: | 1.Environment & Life Sciences Department;Putian University;Putian Fujian 351100;China;2.College of Chemistry & Chemical Engineering;Fuzhou University;Fuzhou Fujian 350108;China |
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| Abstract: | The simulative mixed solution of N,N-dimethylformamide(DMF) and trichloromethane(CHCl3),the mass fraction of DMF in which was 47%,was separated by distillation.When the rate of feed flow was 2L·h-1,the optimum operating parameters were as follows: the feed condition was feeding on bubble point,the feed entrance point was the seventh block tray feed from the top and the reflux ratio was 4.The result indicated :(1) the number of theoretical plates was 4.5,(2) the tray efficiency was 37.5 %,(3) the DMF mass fraction in the product from the top of the packed column was lower than 0.01%,(4) the DMF mass fraction in the product from the bottom was up to 96.03%.The energy consumption could be reduced,the DMF and the chloroform could be reused by the technology,which was friendly with environment. |
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| Keywords: | DMF wastewater chloroform distillation |
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