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过程工程学报 ›› 2018, Vol. 18 ›› Issue (6): 1323-1331.DOI: 10.12034/j.issn.1009-606X.218148

• 过程与工艺 • 上一篇    下一篇

甲基丙烯酸甲酯-甲醇-水共沸体系萃取分离工艺模拟

张军平1,2， 陈嵩嵩1,2， 盛贵阳1， 王 蕾1， 蒋元力3， 顾晓华4， 张香平1*   

  1. 1. 中国科学院过程工程研究所绿色过程与工程重点实验室，北京 100190 2. 中国科学院大学化学化工学院，北京 100049 3. 河南能源化工集团有限公司，河南 郑州 450046 4. 江苏奥克化学有限公司，江苏 扬州 211900
  • 收稿日期:2018-03-14 修回日期:2018-04-05 出版日期:2018-12-22 发布日期:2018-12-19
  • 通讯作者: 张香平 xpzhang@ipe.ac.cn
  • 基金资助:
    国家重点基础研究发展计划（973）

Simulation of extractive separation process of methyl methacrylate-methanol-H2O azeotropic system

Junping ZHANG1,2, Songsong CHEN1,2, Guiyang SHENG1, Lei WANG1, Yuanli JIANG3, Xiaohua GU4, Xiangping ZHANG1*   

  1. 1. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100090, China 2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China 3. Henan Energy and Chemical Industry Group Co., Ltd., Zhengzhou, Henan 450046, China 4. Jiangsu Oxiranchem Company Ltd., Yangzhou, Jiangsu 211900, China
  • Received:2018-03-14 Revised:2018-04-05 Online:2018-12-22 Published:2018-12-19
  • Contact: xiangping zhang xpzhang@ipe.ac.cn

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摘要： 针对甲基丙烯酸甲酯?甲醇?水共沸体系，分别选择水、正己烷和水?正己烷双溶剂为萃取剂建立分离流程进行模拟, 建立单溶剂、双溶剂萃取工艺过程进行全流程模拟，采用灵敏度分析优化工艺过程的溶剂比和操作温度. 结果表明，双溶剂萃取工艺比水、正己烷单溶剂萃取工艺能耗分别降低15.1%和34.9%. 采用绿色度评价方法量化3种分离工艺对环境的影响，水、正己烷、水?正己烷双溶剂萃取工艺的绿色度分别为–7.25, –21.3和–6.75 gd.

关键词: 甲基丙烯酸甲酯, 共沸体系, 双溶剂萃取, 工艺模拟, 绿色度

Abstract: As one of the important oxygen-containing chemicals, methyl methacrylate (MMA) is widely used in producing organic glass (PMMA), coatings, ACR/MBS and so on. The triple azeotropic systems of MMA?methanol?water are formed in the production process, which resulting in difficulty in product purification. In order to solve the problem on separation of MAA?methanol?water azeotropic system, the separation processes of using a single solvent (water or n-hexane) and bi-solvent (a combination of water and n-hexane) as the extractants were established in this study. The models of extraction processes for single solvent and bi-solvent system were simulated. The ratio of solvent and operating temperature were analyzed and systematically optimized using sensitivity analysis method. It demonstrated that the extraction process using bi-solvent had relatively lower energy consumption compared to those of the single ones, and the energy consumption was reduced by 15.0% (vs. n-hexane) and 34.9% (vs. water), respectively. Meanwhile, the influence of three extraction processes on the environmental impact assessment was quantitatively analyzed using green degree analysis method. The results suggested that bi-solvent process was much more environmental friendly. The green degree of separation process using water, n-hexane and bi-solvent as extractant was ?7.25, ?21.3 and ?6.75 gd, respectively.

Key words: methyl methacrylate, azeotropic system, bi-solvent extraction, process simulation, green degree analysis