Device and method for intermittent esterification reaction rectification with acidity control

Abstract

The invention relates to a device and a method for intermittent esterification reaction rectification with acidity control, which are used for the preparation of ester and the purification of a product. The device for intermittent esterification reaction rectification with acidity control mainly comprises a tower kettle, a rectification tower body, a formic acid storage tank, a formic acid feeding pipe, a condensing reflux system, a tower kettle splitter, a glass storage tank which is arranged above the tower kettle and is used for controlling the pH value, and the like. A splitting device is arranged on a tower body above the tower kettle tightly connected with the tower kettle, reflux liquid in the rectification process is led into one storage tank and flows back to the tower kettle through a pipe, and then an acidity meter is placed into the storage tank to control the amount of formic acid flowing into the storage tank. The flowing-out amount of the formic acid in the storage tank is controlled through detecting the amount of the formic acid by using the acidity meter, thereby improving the conversion ratio of the esterification reaction.

Description

technical field [0001] The invention relates to a device and method for intermittent esterification reaction rectification with acidity control, which is used for the preparation of esters and the purification of products. Background technique [0002] More intermittent esterification rectification devices are used at present, and its alcohol is first added in the tower kettle, and the acid is added from the acid raw material storage tank above. Acid is generally the heaviest component, and once it falls into the tower kettle, it will remain in the tower kettle, and there will be a large amount of water in the tower kettle at the later stage of the reaction, which will reduce the conversion rate of the esterification reaction. Contents of the invention [0003] The object of the present invention is to provide a device and method for intermittent esterification rectification with acidity control, which can overcome the defects of the prior art, has a simple structure, is e...

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Problems solved by technology

Acid is generally the heaviest component, and once it falls into the tower kettle, it will remain in the tower kettle, and there will be a lar

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