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Lian L.,South China University of Technology | Lian L.,Zhuhai Cellulose Fibers Co. | Gao Q.-J.,Zhuhai Cellulose Fibers Co. | Jiang Y.-B.,South China University of Technology
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2013

As an important solvent, acetone is widely used in many chemical industries, thus the recycling of acetone is very important for economic and environmental considerations of these industries. However, the traditional process for recovery of acetone, i. e. activated carbon adsorption-desorption-distillation technology, is high energy consumption with less process safety and stability. Recently, great attentions are paid to retrofits of water absorption-distillation flowsheet, it shows that the impurities have great effect on the absorption efficiency and the energy consumption in subsequent distillation process. Several typical impurities including surfactant, dispersant and ammonium salt were selected and added into absorption water for investigating the effects of impurities on the absorption efficiency of acetone-water system. The experimental results show that only sodium hexametaphosphate has weak advantage for acetone absorption, and surfactant and ammonium salts have disadvantage for acetone absorption, thus maintaining water purity is very important during absorption process. Furthermore, the mechanisms of these phenomena were analyzed by using theory of inhibiting bubble coalescence, interfacial resistance or salting-out, respectively. And the experimental results are promising for industrial application.


Lian L.,South China University of Technology | Lian L.,Zhuhai Cellulose Fibers Co. | Gao Q.-J.,Zhuhai Cellulose Fibers Co. | Jiang Y.-B.,South China University of Technology
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2012

As an important organic solvent, acetone is widely used in many chemical industries, and the recovery of acetone is very important for economic and environmental considerations. Distillation unit is used for separating acetone from water solution, thus distillation simulation and optimization is of great significance. Aspen Plus process simulation software was selected to analyze the distillation unit. The invariant zone was found existing in the actual process of acetone-water distillation column, which results in high construction cost and energy consumption. The invariant zone was eliminated by the optimal design, and the operating parameters were also optimized combining with economic analysis. The effects of different feed mass fraction on distillation were also investigated, and increasing the initial mass fraction is the key for energy saving.

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