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Technical Study on Catalytic Reactive Distillation of N-Butyl Acetate Synthesis

Author: ShiQin
Tutor: ZhangPengYuan
School: Beijing University of Chemical Technology
Course: Chemical Engineering and Technology
Keywords: N-butyl acetate Catalytic reaction distillation Cation exchange resin Gravity rotating bed
CLC: TQ225.241
Type: Master's thesis
Year: 2010
Downloads: 268
Quote: 0
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Abstract


N-butyl acetate is an excellent organic solvent widely used in the pharmaceutical, paint and other industries. Industrial synthesis of n-butyl acetate is generally concentrated sulfuric acid as a catalyst, but there are side effects more severe corrosion, and post-processing complex and pollution problems. This thesis is a comprehensive study of the catalytic synthesis of butyl acetate reactive distillation process, strong acid cation exchange resin as the catalyst instead of concentrated sulfuric acid, a complete reaction and separation in the reactive distillation column. The results showed that the impact of various factors on the catalytic reaction distillation size of the degree of influence of the synthesis of butyl acetate experiments are as follows: raw acid alcohol than the feed flow rate, reaction time, reaction temperature; reusable solid acid catalyst, and the environment pollution-free. The catalytic reaction distillation optimum reaction conditions are: acetic acid and n-butanol mixed feed, control the temperature of the feed to 105 ° C -110 ° C, the feed flow of about 800ml / h, feedstock acid to alcohol molar ratio of 1:1.1, reaction time 2.5h, the reaction temperature of 105 ° C top temperature of 95 ° C. In this case, the acetic acid conversion was 89.6%, acetate content 95.4%, good reaction effect. In addition, this paper is the first attempt to exceed gravity technology applied to reactive distillation process, in order to overcome the limitations of the the conventional gravitational field of the reactive distillation technology. And for the first time the catalyst as a rotating bed packing in a rotating bed catalytic reaction distillation experimental study of the synthesis of butyl acetate, mainly on the different rotor speed of the rotating bed results in the experiment, as the rotating bed rotor speed increases, the acetate, conversion rate, and the overhead, and the bottom acetate content size there is a maximum point. Rotor speed 700-800rpm catalytic reactive distillation effect best, acetic acid conversion rate of more than 88%, the ideal product ester content of 75.02%, applied to the reactive distillation process for gravity technology feasibility reliable experimental basis. Comparative tests show that under the same experimental conditions, the catalytic distillation experiments acetate conversion rate of 60%, much lower than the experimental results of the rotating bed, and the product ester content is lower than the experimental results of the rotating bed 20%, indicating that the high gravity environment can improve The efficiency of the catalytic reactive distillation process, and further verify the feasibility and advantages of high gravity technology applied to the reactive distillation process, and provides an important basis for the Reactive Distillation Process for the further development and gravity technology in new areas of application .

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CLC: > Industrial Technology > Chemical Industry > Basic Organic Chemistry Industry > The production of aliphatic compounds ( acyclic compounds) > Aliphatic carboxylic acid and its derivatives > Carboxylic acid derivatives of the function > Ester > Yuan ester
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