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Preparation technology of tert-butyl acrylate

A technology for the preparation of tert-butyl acrylate, which is applied to the preparation of carboxylic acid esters, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of low esterification rate, achieve environmental protection, simple process, and raw material utilization rate high effect

Inactive Publication Date: 2015-10-21
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the esterification rate is low

Method used

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  • Preparation technology of tert-butyl acrylate

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Effect test

Embodiment 1

[0013] Acrylic acid and isobutylene with a molar ratio of 1.0:1.0, together with an acidic catalyst and a polymerization inhibitor, were esterified at a temperature of 40°C and a reaction pressure of 1.0 MPa at a volume space velocity of isobutylene of 0.5 / h to synthesize tert-butyl acrylate.

[0014] Described polymerization inhibitor is tert-butyl catechol, p-hydroxyanisole, 2,5-di-tert-butylhydroquinone and diphenylamine, and the weight ratio of the above-mentioned 4 kinds of polymerization inhibitors is 1:3:2 : 7; the acidic catalyst is a strongly acidic cation exchange resin.

Embodiment 2

[0016] Acrylic acid and isobutylene with a molar ratio of 5.0:1.0, together with an acid catalyst and a polymerization inhibitor, were esterified at a temperature of 120°C and a reaction pressure of 5.0 MPa at a volume space velocity of isobutylene of 5.0 / h to synthesize tert-butyl acrylate.

[0017] Described polymerization inhibitor is tert-butyl catechol, p-hydroxyanisole, 2,5-di-tert-butylhydroquinone and diphenylamine, and the weight ratio of the above-mentioned 4 kinds of polymerization inhibitors is 1:3:2 : 7; the acidic catalyst is a strongly acidic cation exchange resin.

Embodiment 3

[0019] Acrylic acid and isobutylene with a molar ratio of 3.0:1.0, together with an acidic catalyst and a polymerization inhibitor, were esterified at a temperature of 80°C and a reaction pressure of 3.0 MPa at a volume space velocity of isobutylene of 2.0 / h to synthesize tert-butyl acrylate.

[0020] Described polymerization inhibitor is tert-butyl catechol, p-hydroxyanisole, 2,5-di-tert-butylhydroquinone and diphenylamine, and the weight ratio of the above-mentioned 4 kinds of polymerization inhibitors is 1:3:2 : 7; the acidic catalyst is a strongly acidic cation exchange resin.

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Abstract

The invention discloses a preparation technology of tert-butyl acrylate. Acrylic acid, isobutene, an acidic catalyst and a polymerization inhibitor undergo an esterification reaction at 40-120DEG C under 1.0-5.0MPa under an isobutene volume space velocity of 0.5-5.0 / h according to a molar ratio of acrylic acid to isobutene of 1.0:1.0-5.0:1.0, the polymerization inhibitor comprises tert-butylcatechol, p-hydroxyanisole, 2,5-di-tert-butylhydroquinone and diphenylamine according to a weight ratio of 1:3:2:7, and the acidic catalyst is strong-acid cation exchange resin. The method can substantially improve the yield of tert-butyl acrylate.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a preparation process of tert-butyl acrylate. Background technique [0002] Tert-butyl acrylate is an extremely important chemical basic raw material and intermediate. Because of its unique and highly active polar molecule, unsaturated double bond and carboxylate (-COOR) structure, it can be derived into many kinds It has a polymer formula with good performance, and can prepare plastic, cross-linked and other polymers through emulsion polymerization, solution polymerization, copolymerization and other processing methods. Its strong polymer cohesion, good transparency, and clear film formation make it have great potential in the modification of various chemicals. It is used in coatings, coatings, papermaking, non-woven fabrics, super absorbent materials, Detergents, synthetic fibers, synthetic rubber, plastics, leather, adhesives, etc. are more and more wide...

Claims

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Application Information

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IPC IPC(8): C07C67/04C07C69/54
CPCC07C67/04C07C69/54
Inventor 洪静
Owner QILU UNIV OF TECH
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