| Recovery of Dilute Acetic Acid by Catalytic Distillation Using NKC-9 as Catalyst |
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| 作者姓名： | 张志刚 李晓峰 徐世民 李鑫钢 |
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| 作者单位： | National Engineering Research Center for Distillation Technology Tianjin University Tianjin 300072 China，School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China，National Engineering Research Center for Distillation Technology Tianjin University Tianjin 300072 China，National Engineering Research Center for Distillation Technology Tianjin University Tianjin 300072 China |
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| 摘 要： | The reaction kinetics of dilute acetic acid with methanol using NKC-9 as catalyst was studied at temperatures of 308 K, 318 K, 323 K, 328 K. The kinetic model based on Langmuir-Hinshel-wood rate model was derived and the activation energy was 6.13×104 kJ/kmol. The experiment of recovery of dilute acetic acid was conducted in a packed bed catalytic distillation column. The optimal process parameters and operational conditions determined to make up to 85.9% conversion of acetic acid are as follows:the height of catalyst bed is 1 100 mm, reflux ratio is 4:1, and the ratio of methanol to acetic acid is 2:1. The method can be used as a guide in industrial scale recovery of 15%-30% dilute acetic acid.
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| 关 键 词： | 蒸馏 乙酸 催化剂 反应动力学 NKC-9 |
| 收稿时间： | 2005-11-02 |
Recovery of Dilute Acetic Acid by Catalytic Distillation Using NKC-9 as Catalyst |
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| ZHANG Zhigang,LI Xiaofeng,XU Shimin,LI Xingang.Recovery of Dilute Acetic Acid by Catalytic Distillation Using NKC-9 as Catalyst[J].Transactions of Tianjin University,2006,12(4):264-270. |
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| Authors: | ZHANG Zhigang LI Xiaofeng XU Shimin LI Xingang |
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| Abstract: | The reaction kinetics of dilute acetic acid with methanol using NKC-9 as catalyst was studied at temperatures of 308 K, 318 K, 323 K, 328 K. The kinetic model based on Langmuir-Hinshelwood rate model was derived and the activation energy was 6.13 x 104 kJ/kmol. The experiment of recovery of dilute acetic acid was conducted in a packed bed catalytic distillation column. The optimal process parameters and operational conditions determined to make up to 85.9% conversion of acetic acid are as follows:the height of catalyst bed is 1 100 mm, reflux ratio is 4: 1, and the ratio of methanol to acetic acid is 2: 1. The method can be used as a guide in industrial scale recovery of 15%-30% dilute acetic acid. |
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| Keywords: | distillation acetic acid methanol catalyst recovery reaction kinetics |
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