An industrial production method for producing butyl acrylate by reactive distillation in a tower

Abstract

The invention discloses an industrial production method for producing butyl acrylate by in-column reaction rectification. According to the production method, a solid super-strong acid is mainly used as a catalyst, and crude ester from an esterification column directly enters a dealcoholizing column for rectification and separation, thereby obtaining the finished product. The device used by the industrial production method comprises a reaction kettle, an esterification column, a condenser, a phase splitter, a distributor, a dealcoholizing column, an alcohol recovery column and a cracking kettle. The method can lower the material consumption by 1% and lower the steam consumption by 10%, cancels the extraction, neutralization, rectification and other sections in the traditional technique, reduces the generation of wastewater, and ensures the operation stability of the system. The industrial production method is suitable for the field of production of butyl acrylate.

Description

technical field [0001] The invention relates to the technical field of an industrial production method for producing butyl acrylate by reactive distillation in a tower, in particular to an industrial production method for producing butyl acrylate by reactive distillation in a tower using a solid superacid catalyst. Background technique [0002] Butyl acrylate, also known as 2-butyl acrylate or n-butyl acrylate, is a colorless liquid with a molecular formula of C7H12O2. The chemical class is acryloyl compounds. Almost insoluble in water, the toxicity is similar to that of methyl acrylate. Irritating to skin and eyes. Soluble in ethanol, ether, acetone and other organic solvents. The main purpose is to be used as organic synthesis intermediates, adhesives, emulsifiers, coatings, etc. [0003] The production method of butyl acrylate is as long as it is obtained by esterifying acrylic acid and n-butyl ester in the presence of sulfuric acid, and then through neutralization, w...

AI Technical Summary

Problems solved by technology

In the production process, due to the long reaction time or improper control of the catalyst content in the esterification process, more dimers, trimers or high polymers will be produced, resulting in high material consumption and high energy consumption. At the same time, the catalyst It may corrode the heating tube in the reactor, causing the heating tube to easily leak

The extraction and neutralization section will produce a large amount of process wastewater, which contains alcohol and ester, and it will be directly discharged into the ditch, which will cause environmental pollution

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