Process method for preparing (methyl) tert-butyl acrylate through continuous method

A technology of tert-butyl acrylate and process method, which is applied to the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of complex procedures and low yield of tert-butyl acrylate, and achieve simple process steps , large social and economic benefits, and the effect of increasing yield

Active Publication Date: 2014-09-10
WUXI ACRYL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this method is complicated, and the yield of tert-butyl (meth)acrylate is not high

Method used

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  • Process method for preparing (methyl) tert-butyl acrylate through continuous method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Methacrylic acid, tert-butanol and isobutylene are respectively passed through the first pipeline 5, the second pipeline 11, and the third pipeline 7 into the silica-supported phosphotungstovanadium heteropoly acid catalyst H 8 [P 2 W 16 V 2 O 62 ] / SiO 2 In the fixed bed reactor 1, the molar ratio of the controlled feed is 1: 0.1: 0.5, the pressure in the fixed bed reactor 1 is 0.15 MPa, the reaction temperature is 30 ℃, and the feed space velocity is 5 h -1 . The mixed reaction liquid enters the first distillation tower 2 through the seventh pipe 6 at the bottom of the fixed bed reactor 1. The first distillation tower is at atmospheric pressure and the temperature is 30°C. Isobutylene enters the fixed bed reactor 1 through the fourth pipe 8. Continue to participate in the esterification reaction. The high-boiling components tert-butanol, diisobutylene, (meth)acrylic acid and tert-butyl (meth)acrylate enter the second rectification tower 3 through the eighth pipe 9 to cont...

Embodiment 2

[0026] Methacrylic acid, tert-butanol and isobutylene are respectively passed through the first pipeline 5, the second pipeline 11, and the third pipeline 7 into the silica-supported phosphotungstovanadium heteropoly acid catalyst H 9 [P 2 W 15 V 3 O 62 ] / SiO 2 的fixed bed reactor 1. Control the feeding molar ratio of 1: 0.05: 0.7, maintain pressure 0.20MPa, reaction temperature 20℃, and feed space velocity of 7h -1 . The mixed reaction liquid enters the first rectification tower 2 through the seventh pipe 6 at the bottom of the fixed bed reactor 1. Under normal pressure, the temperature of the rectification tower is 30°C, and isobutylene enters the fixed bed reactor 1 through the fourth pipe 8 to continue to participate. In the esterification reaction, the high-boiling components tert-butanol, diisobutylene, (meth)acrylic acid and tert-butyl (meth)acrylate enter the second distillation tower 3 through the eighth pipe 9 to continue distillation, and the second distillation tower ...

Embodiment 3

[0031] Methacrylic acid, tert-butanol and isobutylene are respectively passed through the first pipeline 5, the second pipeline 11, and the third pipeline 7 into the silica-supported phosphotungstovanadium heteropoly acid catalyst H 6 [P 2 W 14 V 4 O 62 ] / SiO 2 的fixed bed reactor 1. Control the feeding molar ratio of 1: 0.15: 0.3, keep the pressure at 0.5 MPa, control the reaction temperature at 40°C, and feed the space velocity at 10 h -1 . The mixed reaction liquid enters the first rectification tower 2 through the seventh pipe 6 at the bottom of the fixed bed reactor 1. Under normal pressure, the temperature of the rectification tower is 30°C, and isobutylene enters the fixed bed reactor 1 through the fourth pipe 8 to continue to participate. In the esterification reaction, the high-boiling components tert-butanol, diisobutylene, (meth)acrylic acid and tert-butyl (meth)acrylate enter the second distillation tower 3 through the eighth pipe 9 to continue distillation, and the s...

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Abstract

The invention provides a process method for preparing (methyl) tert-butyl acrylate through a continuous method. According to the method, the (methyl) tert-butyl acrylate is continuously produced by utilizing a fixed bed reactor and a rectification device, a silica-loaded phosphorus vanadium and tungsten heteropoly acid serves as a catalyst, and tertiary butanol serves as an olefin polymerization inhibitor. By adoption of the process method, the reaction speed is high, the yield of the product is greatly increased, and the whole set of process is simple in steps, low in cost and pollution-free and accords with atomization economy.

Description

technical field [0001] The invention relates to a method for preparing tert-butyl (meth)acrylate, in particular to a method for continuously preparing tert-butyl (meth)acrylate, which belongs to the technical field of organic synthesis. Background technique [0002] Tert-butyl (meth)acrylate is a special kind of monomer with unsaturated double bonds and ester bonds. Various polymers can be prepared through emulsion polymerization, copolymerization or solution polymerization. Its polymer has excellent light stability, weather resistance, water resistance, oil resistance, strong adhesion, high transparency, and clear film formation, so it is more and more widely used in coating resin, packaging materials, leather and papermaking industries. [0003] The traditional esterification method is prepared by using (meth)acrylic acid and tert-butanol. During the reaction, due to the large steric hindrance of tert-butanol, it is more inclined to the elimination reaction in the two comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/04C07C67/54C07C69/54C07C2/06C07C11/02
CPCC07C67/04C07C67/54C07C69/54
Inventor 施英张文泉潘萍范慧军
Owner WUXI ACRYL TECH
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