Process intensification and energy saving of reactive distillation for production of ester compounds

doi:10.1016/j.cjche.2018.10.007

Abstract

Abstract: Reactive distillation (RD) process is an innovative hybrid process combining reaction with distillation, which has recently come into sharp focus as a successful case of process intensification. Considered as the most representative case of process intensification, it has been applied for many productions, especially for production of ester compounds. However, such problems existing in the RD system for ester productions are still hard to solve, as the removal of the water which comes from the esterification, and the separation of the azeotropes of ester-alcohol (-water). Many methods have been studying on the process to solve the problems resulting in further intensification and energy saving. In this paper, azeotropic-reactive distillation or entrainer enhanced reactive distillation (ERD) process, reactive extractive distillation (RED) process, the method of co-production in RD process, pressure-swing reactive distillation (PSRD) process, reactive distillation-pervaporation coupled process (RD-PV), are introduced to solve the problems above, so the product(s) can be separated efficiently and the chemical equilibrium can be shifted. Dividing-wall column (DWC) structure and novel methods of loading catalyst are also introduced as the measures to intensify the process and save energy.

Key words: Reactive distillation, Process intensification, Process coupling, Thermal coupling

摘要： Reactive distillation (RD) process is an innovative hybrid process combining reaction with distillation, which has recently come into sharp focus as a successful case of process intensification. Considered as the most representative case of process intensification, it has been applied for many productions, especially for production of ester compounds. However, such problems existing in the RD system for ester productions are still hard to solve, as the removal of the water which comes from the esterification, and the separation of the azeotropes of ester-alcohol (-water). Many methods have been studying on the process to solve the problems resulting in further intensification and energy saving. In this paper, azeotropic-reactive distillation or entrainer enhanced reactive distillation (ERD) process, reactive extractive distillation (RED) process, the method of co-production in RD process, pressure-swing reactive distillation (PSRD) process, reactive distillation-pervaporation coupled process (RD-PV), are introduced to solve the problems above, so the product(s) can be separated efficiently and the chemical equilibrium can be shifted. Dividing-wall column (DWC) structure and novel methods of loading catalyst are also introduced as the measures to intensify the process and save energy.

关键词: Reactive distillation, Process intensification, Process coupling, Thermal coupling

Chunli Li, Cong Duan, Jing Fang, Hongshi Li. Process intensification and energy saving of reactive distillation for production of ester compounds[J]. Chinese Journal of Chemical Engineering, 2019, 27(6): 1307-1323.

Chunli Li, Cong Duan, Jing Fang, Hongshi Li. Process intensification and energy saving of reactive distillation for production of ester compounds[J]. 中国化学工程学报, 2019, 27(6): 1307-1323.

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