碳酸二甲酯-甲醇-乙二醇等压汽液平衡的测定与关联
|
摘要
为验证乙二醇作为萃取精馏分离碳酸二甲酯+甲醇共沸体系萃取剂的可行性,在100 k Pa下,采用改进的Othmer釜测定了(碳酸二甲酯-甲醇-乙二醇)3组分物系的等压汽液平衡数据。实验结果表明,乙二醇萃取剂的加入,碳酸二甲酯对甲醇的相对挥发度增加,体系的汽液平衡温度升高。碳酸二甲酯+甲醇二组分物系的汽液平衡线发生偏离;乙二醇摩尔分数越大,偏离程度越大。用NRTL模型对汽液平衡的实验数据进行了关联,碳酸二甲酯-甲醇-乙二醇三组分物系温度实验值与计算值的标准偏差为0.82 K。
In order to validate the feasibility of ethylene glycol as the extractive solvent for separation the dimethyl carbonate + methanol azeotropic system by extractive distillation,isobaric vapor-liquid equilibrium( VLE) data of the ternary system( dimethyl carbonate-methanol-ethylene glycol) were measured at 100 k Pa in a modified Othmer still. With the addition of ethylene glycol,the relative volatility of dimethyl carbonate to methanol increases,the vapor-liquid equilibrium temperature increases. The vapor-liquid equilibrium curve of methanol and dimethyl carbonate with ethylene glycol deviates from the curve of methanol and dimethyl carbonate without ethylene glycol.The greater the ethylene glycol mole fraction,the greater the deviation from the curve without the ethylene glycol.The NRTL model was used to correlate the experimental data of the system( dimethyl carbonate-methanol-ethylene glycol). The standard deviation of temperature is 0. 82 K.
In order to validate the feasibility of ethylene glycol as the extractive solvent for separation the dimethyl carbonate + methanol azeotropic system by extractive distillation,isobaric vapor-liquid equilibrium( VLE) data of the ternary system( dimethyl carbonate-methanol-ethylene glycol) were measured at 100 k Pa in a modified Othmer still. With the addition of ethylene glycol,the relative volatility of dimethyl carbonate to methanol increases,the vapor-liquid equilibrium temperature increases. The vapor-liquid equilibrium curve of methanol and dimethyl carbonate with ethylene glycol deviates from the curve of methanol and dimethyl carbonate without ethylene glycol.The greater the ethylene glycol mole fraction,the greater the deviation from the curve without the ethylene glycol.The NRTL model was used to correlate the experimental data of the system( dimethyl carbonate-methanol-ethylene glycol). The standard deviation of temperature is 0. 82 K.
引文
[1]应卫勇.现代煤化工技术丛书——煤基合成化学品[M].北京:化学工业出版社,2010.
[2]姚林祥,刘振锋,宋怀俊,等.变压精馏分离碳酸二甲酯与甲醇工艺流程的模拟[J].河南化工,2013,30(7):32-36.
[3]张立庆,王松岳,钟毓菁,等.乙苯萃取精馏分离甲醇与碳酸二甲酯二元共沸物[J].石油与天然气化工,2005,34(6):522-524.
[4]张立庆,钟毓菁,王松岳,等.甲苯萃取精馏分离甲醇与碳酸二甲酯共沸物[J].天然气化工:C1化学与化工,2005,30(4):51-54.
[5]张立庆,李菊清,丁江浩,等.碳酸二甲酯-甲醇-邻二甲苯三元体系汽液相平衡研究[J].石油与天然气化工,2004,33(1):4-6.
[6]翟小伟,杨伯伦,邱鹏,等.萃取精馏分离甲醇和碳酸二甲酯二元共沸物[J].西安交通大学学报,2008,42(1):91-95.
[7]贾彦雷.碳酸二甲酯与甲醇分离的模拟研究[J].青岛科技大学学报:自然科学版,2011,32(1):5-11.
[8]王海霞,吕效平.碳酸乙烯酯萃取精馏分离DMCCH3OH恒沸物模拟[J].天然气化工:C1化学与化工,2007,32(5):19-22.
[9]李扬,袁苏霞,吕效平.间歇萃取精馏分离碳酸二甲酯与甲醇恒沸物[J].化工进展,2008,27(9):1400-1403.
[10]李群生,朱炜,付永泉,等.常压下甲醇-碳酸二甲酯汽液平衡测定及其萃取剂选择[J].化学工程,2011,39(8):44-47.
[11]张立庆,丁江浩,陈建刚.碳酸二甲酯-甲醇-糠醛三元体系汽液平衡数据的推算与关联[J].计算机与应用化学,2002,19(5):285-286.
[12]李光兴,熊国玺.糠醛萃取精馏分离甲醇-碳酸二甲酯二元共沸物研究[J].化学工程,2000,28(4):12-13.
[13]潘鹤林,田恒水,于水.萃取精馏分离甲醇-碳酸二甲酯二元恒沸物[J].华东理工大学学报:自然科学版,1998,25(4):389-392.
[14]陶荣,杨万典,仲庆.用ASPEN模拟结果优化甲醇和碳酸二甲酯共沸物萃取精馏[J].化工设计,2015,25(3):9-11.
[15]WANG Sanjang,YU Chengching,HUANG Hsiaoping.Plant-wide design and control of DMC synthesis process via reactive distillation and thermally coupled extractive distillation.[J].Computers&Chemical Engineering,2010,34(3):361-373.
[16]LI Qunsheng,ZHANG Shuang,DING Bangqin,et al.Isobaric vapor-liquid equilibrium for methanol+dimethyl carbonate+trifluoromethanesulfonate-based ionic liquids at 101.3 k Pa[J].Journal of Chemical&Engineering Data,2014,59(11):3488-3494.
[17]CAI Fufeng,WU Xinying,CHEN Chang,et al.Isobaric vapor-liquid equilibrium for methanol+dimethyl carbonate+phosphoric-based ionic liquids[J].Fluid Phase Equilibria,2013,352:47-53.
[18]CHEN Xiaochun,CAI Fufeng,WU Xinying,et al.Isobaric vapor-liquid Equilibrium for methanol+dimethyl carbonate+1-butyl-3-methylimidazolium bibutylphosphate[J].Journal of Chemical&Engineering Data,2013(58):1186-1192.
[19]KIM H D,HWANG I C,PARK SJ.Isothermal vapor-liquid equilibrium data at T=333.15 K and excess molar volumes and refractive Indices at t=298.15 K for the dimethyl carbonate+methanol and isopropanol+water with ionic liquids[J].Journal of Chemical&Engineering Data,2010,55(7):2474-2481.
[20]李文秀,连利燕,张志刚,等.萃取精馏分离碳酸二甲酯和甲醇共沸物[J].化学工程,2012,40(7):14-17.
[21]金彪.萃取精馏分离甲醇-碳酸二甲酯共沸物的研究[J].精细石油化工进展,2015,40(4):34-37.
[22]曹玲,李群生.乙酸乙酯-乙腈-1-辛基-3-甲基咪唑六氟磷酸盐物系等压汽液相平衡数据的测定与关联[J].石油化工,2016,45(2):194-199.
[23]朱自强,姚善泾,金彰礼.流体相平衡原理及其应用[M].杭州:浙江大学出版社,1990.
[24]LUO Huping,XIAO Wende,ZHU Kaihong.Isobaric vapor-liquid equilibria of alkyl carbonates with alcohols[J].Fluid Phase Equilibria,2000,175(175):91-105.
[25]YANG Changsheng,XIA Yin,MA Shengyong.Organic salt effect of tetramethylammonium bicarbonate on the vapor-liquid equilibrium of the dimethyl carbonate+methanol system[J].Journal of Chemical&Engineering Data,2012,57(1):66-71.
[26]王记莲,申宏丹.酯交换法合成碳酸二甲酯研究新进展[J].化工科技市场,2010,33(1):31-33.
[2]姚林祥,刘振锋,宋怀俊,等.变压精馏分离碳酸二甲酯与甲醇工艺流程的模拟[J].河南化工,2013,30(7):32-36.
[3]张立庆,王松岳,钟毓菁,等.乙苯萃取精馏分离甲醇与碳酸二甲酯二元共沸物[J].石油与天然气化工,2005,34(6):522-524.
[4]张立庆,钟毓菁,王松岳,等.甲苯萃取精馏分离甲醇与碳酸二甲酯共沸物[J].天然气化工:C1化学与化工,2005,30(4):51-54.
[5]张立庆,李菊清,丁江浩,等.碳酸二甲酯-甲醇-邻二甲苯三元体系汽液相平衡研究[J].石油与天然气化工,2004,33(1):4-6.
[6]翟小伟,杨伯伦,邱鹏,等.萃取精馏分离甲醇和碳酸二甲酯二元共沸物[J].西安交通大学学报,2008,42(1):91-95.
[7]贾彦雷.碳酸二甲酯与甲醇分离的模拟研究[J].青岛科技大学学报:自然科学版,2011,32(1):5-11.
[8]王海霞,吕效平.碳酸乙烯酯萃取精馏分离DMCCH3OH恒沸物模拟[J].天然气化工:C1化学与化工,2007,32(5):19-22.
[9]李扬,袁苏霞,吕效平.间歇萃取精馏分离碳酸二甲酯与甲醇恒沸物[J].化工进展,2008,27(9):1400-1403.
[10]李群生,朱炜,付永泉,等.常压下甲醇-碳酸二甲酯汽液平衡测定及其萃取剂选择[J].化学工程,2011,39(8):44-47.
[11]张立庆,丁江浩,陈建刚.碳酸二甲酯-甲醇-糠醛三元体系汽液平衡数据的推算与关联[J].计算机与应用化学,2002,19(5):285-286.
[12]李光兴,熊国玺.糠醛萃取精馏分离甲醇-碳酸二甲酯二元共沸物研究[J].化学工程,2000,28(4):12-13.
[13]潘鹤林,田恒水,于水.萃取精馏分离甲醇-碳酸二甲酯二元恒沸物[J].华东理工大学学报:自然科学版,1998,25(4):389-392.
[14]陶荣,杨万典,仲庆.用ASPEN模拟结果优化甲醇和碳酸二甲酯共沸物萃取精馏[J].化工设计,2015,25(3):9-11.
[15]WANG Sanjang,YU Chengching,HUANG Hsiaoping.Plant-wide design and control of DMC synthesis process via reactive distillation and thermally coupled extractive distillation.[J].Computers&Chemical Engineering,2010,34(3):361-373.
[16]LI Qunsheng,ZHANG Shuang,DING Bangqin,et al.Isobaric vapor-liquid equilibrium for methanol+dimethyl carbonate+trifluoromethanesulfonate-based ionic liquids at 101.3 k Pa[J].Journal of Chemical&Engineering Data,2014,59(11):3488-3494.
[17]CAI Fufeng,WU Xinying,CHEN Chang,et al.Isobaric vapor-liquid equilibrium for methanol+dimethyl carbonate+phosphoric-based ionic liquids[J].Fluid Phase Equilibria,2013,352:47-53.
[18]CHEN Xiaochun,CAI Fufeng,WU Xinying,et al.Isobaric vapor-liquid Equilibrium for methanol+dimethyl carbonate+1-butyl-3-methylimidazolium bibutylphosphate[J].Journal of Chemical&Engineering Data,2013(58):1186-1192.
[19]KIM H D,HWANG I C,PARK SJ.Isothermal vapor-liquid equilibrium data at T=333.15 K and excess molar volumes and refractive Indices at t=298.15 K for the dimethyl carbonate+methanol and isopropanol+water with ionic liquids[J].Journal of Chemical&Engineering Data,2010,55(7):2474-2481.
[20]李文秀,连利燕,张志刚,等.萃取精馏分离碳酸二甲酯和甲醇共沸物[J].化学工程,2012,40(7):14-17.
[21]金彪.萃取精馏分离甲醇-碳酸二甲酯共沸物的研究[J].精细石油化工进展,2015,40(4):34-37.
[22]曹玲,李群生.乙酸乙酯-乙腈-1-辛基-3-甲基咪唑六氟磷酸盐物系等压汽液相平衡数据的测定与关联[J].石油化工,2016,45(2):194-199.
[23]朱自强,姚善泾,金彰礼.流体相平衡原理及其应用[M].杭州:浙江大学出版社,1990.
[24]LUO Huping,XIAO Wende,ZHU Kaihong.Isobaric vapor-liquid equilibria of alkyl carbonates with alcohols[J].Fluid Phase Equilibria,2000,175(175):91-105.
[25]YANG Changsheng,XIA Yin,MA Shengyong.Organic salt effect of tetramethylammonium bicarbonate on the vapor-liquid equilibrium of the dimethyl carbonate+methanol system[J].Journal of Chemical&Engineering Data,2012,57(1):66-71.
[26]王记莲,申宏丹.酯交换法合成碳酸二甲酯研究新进展[J].化工科技市场,2010,33(1):31-33.