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题名	离子液体吸收甲基丙烯醛的应用基础研究
作者	陈琼
学位类别	硕士
答辩日期	2007-06-10
授予单位	中国科学院过程工程研究所
授予地点	过程工程研究所
导师	张锁江
关键词	甲基丙烯醛 离子液体 汽液相平衡 吸收 传质系数
其他题名	Foundamental Studies on Absorption of Methacrolein Using Ionic Liquids
学位专业	应用化学
中文摘要	本论文以开发新型的甲基丙烯醛的吸收分离工艺为目标，系统地研究了甲基丙烯醛和离子液体体系、甲醇和离子液体体系的汽液相平衡，测定了甲基丙烯醛在离子液体中的传质系数，同时开发了新型甲基丙烯醛的吸收分离工艺—水吸收+甲醇共沸精馏，为开发甲基丙烯酸甲酯的清洁生产工艺提供科学基础。 论文的主要研究内容以及创新性结果如下： 1. 合成并纯化了离子液体1-丁基-3-甲基咪唑四氟硼酸盐([bmim]BF4)和1-丁基-3-甲基咪唑六氟磷酸盐([bmim]PF6)，1H-NMR和13C-NMR表征离子液体结构与文献相符，离子液体中溴离子的含量不超过0.0025 mol•kg-1，水含量不超过200 ppm。 2. 系统地研究了甲基丙烯醛、甲醇分别与离子液体[bmim]BF4和[bmim]PF6二元体系的汽液相平衡，采用NRTL模型对汽液平衡数据进行了关联，关联结果与实验值吻合较好。由于甲基丙烯醛和甲醇与离子液体的之间的氢键作用力大小不同，甲基丙烯醛与离子液体体系相对于理想溶液产生正偏差，甲醇与离子液体体系相对于理想溶液产生负偏差。 3. 测定了在不同条件下的甲基丙烯醛在离子液体[bmim]BF4中的传质系数，获得了传质系数随载气流速、吸收剂温度、离子液体含量的变化规律。建立了小型的离子液体吸收塔，研究了不同条件下的吸收效果，获得了优化工艺参数。 4. 开发了一种新型的甲基丙烯醛的分离提纯工艺，该工艺的特点是先用水吸收，然后加入甲醇共沸精馏。与现有工艺相比，该方法简单可行，能耗低，所得产品甲基丙烯醛的水含量低于500 ppm。
英文摘要	The target of this work is to exploit the new technology of separating methacrolein. Vapor-liquid equilibria for methacrolein and methanol in ionic liquids have been systemically investigated, and the mass transfer coefficients of methacrolein in ionic liquid been determined. A new technology of separating methacrolein was exploited at the meantime, which contained two steps: absorption using water and rectification with methanol. This work provide valuable fundamental data for clean technology of manufacting methyl methaerylate. The major work and innovative results for this dissertation are as the following. 1. Ionic liquids 1-butyl-3-imidazolium tetrafluoroborate ([bmim]BF4) and 1-butyl-3- imidazolium hexafluorophosphorate ([bmim]PF6) had been synthesized and purified. The characterization methods of 1H-NMR and 13C-NMR had been used to describe the structure of ionic liquids which was identical with literature. The content of Br- in ionic liquids was lower than 0.0025 mol•kg-1 and the content of water in ionic liquids was lower than 200 ppm. 2. The present work systemically investigated vapor-liquid equilibria of methacrolein and methanol in ionic liquids [bmim]BF4 and [bmim]PF6 respectively. The vapor-liquid equilibrium data were correlated with the NRTL model, which results was in good agreement with the experimental data. It was found that the system of methacrolein and ionic liquids had positive deviation and that of methanol and ionic liquids had negative deviation comparing to ideal solution. 3. The mass transfer coefficients of methacrolein in [bmim]BF4 had been determined in different conditions, and the rules of the mass transfer coefficients changed along with the velocity of inert gas, temperature of absorbent and the content of [bmim]BF4 were determined. An absorption column was set up, and the best parameters in operating were obtained with comparing the ratio of absorption in different conditions. 4. A new technology of separating methacrolein was exploited, which contained two steps : absorption using water and rectification with methanol. This simple technology was low energy cost, and the content of water in methacrolein was lower than 500 ppm.
语种	中文
公开日期	2013-09-13
页码	98
内容类型	学位论文
源URL	[http://ir.ipe.ac.cn/handle/122111/1167]
专题	过程工程研究所_研究所（批量导入）
推荐引用方式 GB/T 7714	陈琼. 离子液体吸收甲基丙烯醛的应用基础研究[D]. 过程工程研究所. 中国科学院过程工程研究所. 2007.

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