SCI和EI收录∣中国化工学会会刊

›› 2010, Vol. 18 ›› Issue (5): 755-760.

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Coupled Reaction/Distillation Process for Hydrolysis of Methyl Acetate

赵素英1, 黄镜钊1, 王良恩1, 黄国强2   

  1. 1. College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, China;
    2. National Engineering Research Center for Distillation Technology (NERCDT), Tianjin 300072, China
  • 收稿日期:2010-01-08 修回日期:2010-07-17 出版日期:2010-10-28 发布日期:2010-10-28
  • 通讯作者: ZHAO Suying,E-mail:zhaosuying@fzu.edu.cn
  • 基金资助:
    Supported by the National Torch Program of China (2007HG560031)

Coupled Reaction/Distillation Process for Hydrolysis of Methyl Acetate

ZHAO Suying1, HUANG Jingzhao1, WANG Liang'en1, HUANG Guoqiang2   

  1. 1. College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, China;
    2. National Engineering Research Center for Distillation Technology (NERCDT), Tianjin 300072, China
  • Received:2010-01-08 Revised:2010-07-17 Online:2010-10-28 Published:2010-10-28
  • Supported by:
    Supported by the National Torch Program of China (2007HG560031)

摘要: A process composed of a fixed-bed and a distillation column with a side withdraw, mainly methanol, is developed to hydrolyze methyl acetate (MA) as a typical byproduct in polyvinyl alcohol (PVA) and pure terephthalic acid (PTA) factory. The process is simulated by employing the equilibrium stage model RadFrac and plug flow model Rplug in Aspen Plus. Experiments are also carried out in a lab-scale to evaluate the process. The results show that at the molar ratio of water to methyl acetate about 4.0-5.0 in the feed stream and the volume ratio of distillate to feed MA above a critical value, the side product contains more than 80% (by mass) (MeOH) and less than 2% (by mass) MA, while the bottom contains more than 46% (by mass) acetic acid (HAc) and less than 0.5% (by mass) methanol with almost complete conversion of MA. Compared with the old catalytic distillation process we proposed before, this process can cut down 47.6% energy consumption and a distillation column.

关键词: methyl acetate, hydrolysis, simulation

Abstract: A process composed of a fixed-bed and a distillation column with a side withdraw, mainly methanol, is developed to hydrolyze methyl acetate (MA) as a typical byproduct in polyvinyl alcohol (PVA) and pure terephthalic acid (PTA) factory. The process is simulated by employing the equilibrium stage model RadFrac and plug flow model Rplug in Aspen Plus. Experiments are also carried out in a lab-scale to evaluate the process. The results show that at the molar ratio of water to methyl acetate about 4.0-5.0 in the feed stream and the volume ratio of distillate to feed MA above a critical value, the side product contains more than 80% (by mass) (MeOH) and less than 2% (by mass) MA, while the bottom contains more than 46% (by mass) acetic acid (HAc) and less than 0.5% (by mass) methanol with almost complete conversion of MA. Compared with the old catalytic distillation process we proposed before, this process can cut down 47.6% energy consumption and a distillation column.

Key words: methyl acetate, hydrolysis, simulation