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Method for continuously preparing dicyclopentenyl acrylate

A technology of dicyclopentenyl acrylate and acrylic acid, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of DCPA selectivity decline, implosion polymerization, and increased content of heavy components, and achieve Increased selectivity and yield, short residence time, and rapid reaction

Pending Publication Date: 2022-03-22
广东希必达新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main defect of the existing technical solutions is that the addition reaction of acrylic acid and dicyclopentadiene has a strong exothermic reaction, and acrylic acid, dicyclopentadiene and the product dicyclopentenyl acrylate are prone to self- or cross-polymerization reactions at high temperatures At the same time, a large amount of heat is released, and there is a risk of implosion in industrial production; on the other hand, during the reaction process, acrylic acid can further add to the double bond in DCPA, resulting in a decrease in the selectivity of DCPA and an increase in the content of heavy components

Method used

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  • Method for continuously preparing dicyclopentenyl acrylate
  • Method for continuously preparing dicyclopentenyl acrylate
  • Method for continuously preparing dicyclopentenyl acrylate

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Embodiment 1

[0027] Such as figure 1 As shown, the first microchannel reactor 2 includes two feed ports and a discharge port, and the two feed ports are respectively used to add the first mixed liquid and the second mixed liquid of raw materials, and the two feed ports are respectively connected Metering pump 1 is arranged, and the discharge port of the first microchannel reactor 2 is connected with an end of the extension pipe 3 after the reactor, and the second microchannel reactor 4 comprises two feed ports and a discharge port, and the second microchannel One of the feed ports of the reactor 4 is connected with the other end of the rear extension pipe 3 of the reactor, and the other feed port of the second microchannel reactor 4 is connected with a metering pump 1 .

[0028] The preparation method of this embodiment is:

[0029] (1) Catalyst and acrylic acid are mixed to obtain the first mixed solution, wherein the mass ratio of catalyst and acrylic acid is 1:100, and the catalyzer is...

Embodiment 2

[0033] The difference between this embodiment and embodiment 1 is that the reaction temperature of the first microchannel reactor is 70°C.

Embodiment 3

[0035] The difference between this embodiment and embodiment 1 is that the reaction temperature of the first microchannel reactor is 90°C.

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Abstract

The invention relates to a method for preparing dicyclopentenyl acrylate, in particular to a method for continuously preparing dicyclopentenyl acrylate, which comprises the following steps: mixing a catalyst and acrylic acid, and continuously pumping into a first microchannel reactor; mixing a polymerization inhibitor, dicyclopentadiene and a solvent, and continuously pumping the mixture into a first microchannel reactor for reaction to obtain a first reaction solution; the first reaction solution enters a second micro-channel reactor through an extension pipe after passing through the reactor and is subjected to a neutralization reaction with alkali liquor to obtain a second reaction solution, and then the second reaction solution is subjected to standing and reduced pressure distillation to obtain the product. The dicyclopentenyl acrylate is prepared by adopting the microchannel reactor, so that continuous and stable feeding of acrylic acid and dicyclopentadiene is ensured, the selectivity and yield of the dicyclopentenyl acrylate are improved, the temperature in the reaction process is effectively controlled, and the risk of implosion is avoided.

Description

technical field [0001] The present invention relates to the preparation method of dicyclopentenyl acrylate, more specifically, relate to a kind of method of continuous preparation dicyclopentenyl acrylate. Background technique [0002] Dicyclopentenyl acrylate (DCPA for short) is a colorless or light yellow transparent liquid with the molecular formula: C 13 h 16 o 2 , CAS No. 33791-58-1. DCPA is a monomer with excellent performance and has wide application prospects. Its structure introduces a larger dicyclopentadiene group, so its homopolymer has a higher glass transition temperature (Tg), hardness, Both water resistance and transparency show relatively good performance. At the same time, the unreacted double bond on the ring can make it oxidatively polymerized in the air like a drying oil, that is, air-drying, so it can be widely used in coatings, adhesives, plastic surfaces, and optical materials that require insulation and high hardness It is an ideal reactive dilu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/54C07C67/04B01J19/00
CPCC07C67/04B01J19/0093C07C69/54
Inventor 黄志健梁学文黄永东
Owner 广东希必达新材料科技有限公司