Water washing method for isooctyl acrylate esterification liquid

Abstract

The invention discloses a water washing method for an isooctyl acrylate esterification liquid. The method comprises the following steps: performing a mixed esterification reaction on raw materials ina first reaction kettle, pouring a steam mixture obtained by the reaction from the lower part of the side of a second reaction kettle, performing distillation, allowing an alcohol steam phase obtainedafter the distillation is finished to flow into the first reaction kettle, performing a sulfurization reaction, introducing a residual liquid phase obtained in the second reaction kettle into a waterwashing tower, allowing washed acrylic acid to flow out from a material outlet of the water washing tower, adding an alkali into acidic substances obtained by hydrolysis of a material discharged froma material outlet located in the top of the water washing tower, performing neutralization, sending the obtained water-containing phase into a distillation column C1, and performing allyl alcohol recovery to obtain finished acrylic acid. The method provided by the invention adopts the above steps or esterification water washing, a liquid phase, a gas phase and a waste residue phase produced in each step are subjected to cyclic reaction treatment to ensure full utilization of the reactants, at the same time, the acrylic acid is obtained by utilizing a plurality of times of reciprocating reactions, and a completion degree of an esterification reaction of the acrylic acid is greatly improved compared with that of a current known process.

Description

technical field [0001] The invention relates to a water washing method for isooctyl acrylate esterification liquid, in particular to a water washing method for isooctyl acrylate esterification liquid with compact process and complete esterification reaction. Background technique [0002] In the past production process of isooctyl acrylate, the neutralization reaction is carried out after the esterification reaction, and there is no direct water washing process after the esterification, and the product quality is low and the consumption is large, which cannot meet the production needs. In the past, in the water washing tower, the raw materials were transported into the tower body, and the cleaning solution was transported into the tower body to carry out the cleaning reaction of the raw materials, etc., the water washing effect was not good, and the work efficiency was time-consuming, so I thought of improving the acrylated process. [0003] Chinese Patent 201610641005.1 disc...

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Problems solved by technology

In the production process of this process, it is found that the esterification reaction has the problem of incomplete esterification and high waste residue rate, so how to improve the degree of completion of the esterification reaction and control the waste residue rate is the problem of the present invention.