Ester-exchange reaction device

Abstract

The invention discloses an ester-exchange reaction device. The ester-exchange reaction device comprises a reaction kettle, a rectifying tower, a condenser, an azeotrope storage tank and an entrainer, wherein the reaction kettle is communicated with the rectifying tower by a pipeline; the condenser is communicated with the top part of the rectifying tower by a pipeline; the azeotrope storage tank is respectively communicated with the top part, the middle part and the bottom part of the rectifying tower by a feeding pipe at the top part of the rectifying tower, a feeding pipe at the middle part of the rectifying tower and a feeding pipe at the bottom of the rectifying tower. Due to adoption of the technical scheme, the ester-exchange reaction device disclosed by the invention can overcome the defects that the by-product (alcohol) is not removed in time, the removing speed of the by-product (alcohol) is slow, the reaction conversion rate is not high and the reaction time is longer in the existing production process of ester-exchange reaction, the simple and effective ways are provided for increasing the reaction conversion rate, shortening the reaction time, reducing the energy consumption and lowering the material consumption.

Description

technical field [0001] The invention relates to a reaction device in the technical field of organic chemical production, in particular to a transesterification reaction device. Background technique [0002] The transesterification reaction process is usually an ester and an alcohol, and the transesterification reaction is carried out under the action of a catalyst to generate another desired ester and a low-boiling point by-product alcohol. Since the transesterification process is reversible, the rate of reaction product formation is largely determined by the rate of removal of by-product alcohol. At present, in order to obtain a higher reaction conversion rate in industrial production, a combination of reaction and rectification or a reaction device coupled with reactive distillation is used for transesterification reaction. By adding an entrainer, the entrainer and the by-product alcohol produced by the reaction An azeotrope is formed, which is then removed in a rectifica...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: aiming at the problems of untimely removal of by-product alcohol in the production process of the existing transesterification reaction, slow removal of by-product alcohol, low reaction conversion rate and long reaction time, a new method is provided. A simple and effective transesterification reaction device capable of increasing reaction conversion rate, shortening reaction time, saving energy consumption and reducing raw material consumption

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