A large amount of waste liquids containing methanol/acetone/water mixtures are produced in the synthesis of methyl methacrylate(MMA).Under the advocacy of green chemical industry,it is urgent to develop an efficient,e...A large amount of waste liquids containing methanol/acetone/water mixtures are produced in the synthesis of methyl methacrylate(MMA).Under the advocacy of green chemical industry,it is urgent to develop an efficient,economic and energy-saving mixture separation process.Through thermodynamic azeotropic behavior and pressure sensitivity analysis,pressure-swing distillation was determined and the optimal separation pressure of each column in the process was obtained.Due to the composition of waste liquids produced were quite different in MMA production,the pressure-swing distillation separation process was designed to fully achieve the accurate waste liquids treatment.Taking the total annual cost(TAC)as the target,the sequential iteration method was used to optimize the process,and the impact of composition on economy was compared.In order to further realize the energy-saving of the separation process,the pervaporation membrane module was introduced to pretreat the waste liquid in the pressure-swing distillation.The results showed that the TAC of the coupling process was 46% higher than that of the pressure-swing distillation process,and the thermodynamic efficiency was 30% higher.This study provides waste liquid treatment technology for enterprises and analyzes its economic and energy efficiency,which has reference significance for the development of coupled separation technology.展开更多
Deputy Minister Yaneva of Economy and Energy,the Republic of Bul- garia,a nice lady with outstanding talents,headed a delegation of Bulgaria to visit China in late June,for the participation at the 13th Bulgarian-Chi-...Deputy Minister Yaneva of Economy and Energy,the Republic of Bul- garia,a nice lady with outstanding talents,headed a delegation of Bulgaria to visit China in late June,for the participation at the 13th Bulgarian-Chi- nese Intergovernmental Commission for Economic,Trade,Scientific and Technical Cooperation.As an important instrument,the Joint Commission played a significant role in promoting the overall development of the bilat- eral economic relations. China's Foreign Trade interviewed Deputy Minister Yaneva and she gave very constructive suggestions on promoting the bilateral economic and trade cooperation between the two countries,especially in the area of energy cooperation.The following is a written interview with Deputy Min- ister Yaneva.展开更多
基金supported by the National Natural Science Foundation of China(22078166)。
文摘A large amount of waste liquids containing methanol/acetone/water mixtures are produced in the synthesis of methyl methacrylate(MMA).Under the advocacy of green chemical industry,it is urgent to develop an efficient,economic and energy-saving mixture separation process.Through thermodynamic azeotropic behavior and pressure sensitivity analysis,pressure-swing distillation was determined and the optimal separation pressure of each column in the process was obtained.Due to the composition of waste liquids produced were quite different in MMA production,the pressure-swing distillation separation process was designed to fully achieve the accurate waste liquids treatment.Taking the total annual cost(TAC)as the target,the sequential iteration method was used to optimize the process,and the impact of composition on economy was compared.In order to further realize the energy-saving of the separation process,the pervaporation membrane module was introduced to pretreat the waste liquid in the pressure-swing distillation.The results showed that the TAC of the coupling process was 46% higher than that of the pressure-swing distillation process,and the thermodynamic efficiency was 30% higher.This study provides waste liquid treatment technology for enterprises and analyzes its economic and energy efficiency,which has reference significance for the development of coupled separation technology.
文摘Deputy Minister Yaneva of Economy and Energy,the Republic of Bul- garia,a nice lady with outstanding talents,headed a delegation of Bulgaria to visit China in late June,for the participation at the 13th Bulgarian-Chi- nese Intergovernmental Commission for Economic,Trade,Scientific and Technical Cooperation.As an important instrument,the Joint Commission played a significant role in promoting the overall development of the bilat- eral economic relations. China's Foreign Trade interviewed Deputy Minister Yaneva and she gave very constructive suggestions on promoting the bilateral economic and trade cooperation between the two countries,especially in the area of energy cooperation.The following is a written interview with Deputy Min- ister Yaneva.
