Production process of 2-ethylhexyl acrylate

A production process technology of isooctyl acrylate, which is applied in the field of production process of isooctyl acrylate, can solve the problems of cumbersome post-processing, unfavorable environmental protection, etc., and achieve the effects of reducing complicated procedures, increasing conversion rate, and high purity of finished products

Inactive Publication Date: 2019-10-22
JIANGSU XINDONGFENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct esterification is an important method for preparing isooctyl acrylate. The direct esterification method is accompanied by a variety of side reactions in the production process. In order to reduce the occurrence of side reactions, at present, the main method is to add a dehydrating agent to the reaction system to remove the reaction in time. water, and the dehydrating agent is mostly benzene organic solvent, which is not conducive to environmental protection, and the post-treatment is more cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of production technology of isooctyl acrylate is characterized in that: comprise the following steps:

[0024] 1) Prepare raw materials, prepare acrylic acid, isooctyl alcohol, catalyst and polymerization inhibitor raw materials, wherein the ratio of acrylic acid and isooctyl alcohol is 1:1.5, the catalyst accounts for 2% of the total amount of acrylic acid and isooctyl alcohol, and the polymerization inhibitor accounts for acrylic acid and 0.01% of the total amount of iso-octanol; 2) esterification, iso-octanol, catalyst and polymerization inhibitor were added to the reactor, and reacted at room temperature for 8 hours, and acrylic acid was added dropwise during the reaction into the reactor; 3) deep esterification, the reaction solution in step 2) was heated to 80°C in the reactor for 60 minutes, and the remaining acrylic acid was added to the reactor in the form of dropwise addition during the reaction; 4) crude steaming, heat up the reaction solution to 140°C...

Embodiment 2

[0028] A kind of production technology of isooctyl acrylate is characterized in that: comprise the following steps:

[0029] 1) Prepare raw materials, prepare acrylic acid, isooctyl alcohol, catalyst and polymerization inhibitor raw materials, wherein the ratio of acrylic acid and isooctyl alcohol is 1:1.5, the catalyst accounts for 5% of the total amount of acrylic acid and isooctyl alcohol, and the polymerization inhibitor accounts for acrylic acid and 0.05% of the total amount of isooctyl alcohol; 2) esterification, join the isooctyl alcohol, catalyst and polymerization inhibitor in the reactor, react at room temperature for 7 hours, add acrylic acid in the form of dropwise addition during the reaction into the reactor; 3) deep esterification, the reaction solution in step 2) was heated to 85°C in the reactor for 45 minutes, and the remaining acrylic acid was added to the reactor in the form of dropwise addition during the reaction; 4) crude steaming, heat up the reaction s...

Embodiment 3

[0033] A kind of production technology of isooctyl acrylate is characterized in that: comprise the following steps:

[0034] 1) Prepare raw materials, prepare acrylic acid, isooctyl alcohol, catalyst and polymerization inhibitor raw materials, wherein the ratio of acrylic acid and isooctyl alcohol is 1:1.5, the catalyst accounts for 8% of the total amount of acrylic acid and isooctyl alcohol, and the polymerization inhibitor accounts for acrylic acid and 0.08% of the total amount of isooctyl alcohol; 2) esterification, join the isooctyl alcohol, catalyst and polymerization inhibitor in the reactor, react at room temperature for 6.5 hours, add acrylic acid in the form of dropwise addition in the reaction process into the reactor; 3) deep esterification, the reaction solution in step 2) was heated to 88 ° C in the reactor for 35 minutes, and the remaining acrylic acid was added to the reactor in the form of dropwise addition during the reaction; 4) crude steaming, heat up the re...

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PUM

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Abstract

The invention discloses a production process of 2-ethylhexyl acrylate, which comprises the working procedures of raw material preparation, esterification, deep esterification, crude steaming, dealcoholization and residual liquid treatment. The method optimizes the production process of the 2-ethylhexyl acrylate, and can effectively control the occurrence of side reactions by adding a composite catalyst with high catalytic performance and completing most esterification reactions in a room temperature environment, and further carries out deep esterification reactions by heating to improve the conversion rate of esterification. In the whole process of esterification and deep esterification, raw material acrylic acid is added in a dripping way, so that the whole reaction can be ensured to occur in an alcohol excess environment, the side reactions are reduced, and the stability of the esterification reaction is ensured; crude distillation and high-temperature steam dealcoholization are adopted to separate water, alcohol, acid and other reaction raffinate from the 2-ethylhexyl acrylate in time so as to avoid dehydration treatment by a benzene water absorbent and reduce complicated post-treatment procedures. The 2-ethylhexyl acrylate prepared by that method has the advantages of high esterification conversion rate, few side reaction and high product purity.

Description

Technical field: [0001] The invention relates to the production technical field of isooctyl acrylate, in particular to a production process of isooctyl acrylate. Background technique: [0002] Isooctyl acrylate is an important synthetic intermediate and a monomer for the synthesis of polymers, and is widely used in rubber, medicine, leather, paper, adhesives and coatings industries. Direct esterification is an important method for preparing isooctyl acrylate. The direct esterification method is accompanied by a variety of side reactions in the production process. In order to reduce the occurrence of side reactions, at present, the main method is to add a dehydrating agent to the reaction system to remove the reaction in time. water, and the dehydrating agent is mostly benzene organic solvent, which is not conducive to environmental protection, and the post-treatment is more cumbersome. [0003] The information disclosed in this Background section is only for enhancing the u...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C67/62C07C67/48C07C67/54C07C69/54
CPCC07C67/08C07C67/48C07C67/54C07C67/62C07C69/54
Inventor 周晓云
Owner JIANGSU XINDONGFENG CHEM TECH
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