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Method for synthesizing epoxy resin through olefin oxidation

An epoxy resin, oxidative synthesis technology, applied in the direction of chemical recovery, etc., can solve the problems that the catalyst cannot be recycled, the catalyst affects the product quality, the product reaction efficiency is low, etc., and achieves high product reaction efficiency, good catalytic effect, High utilization effect

Pending Publication Date: 2021-09-24
NANTONG SYNASIA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a method for synthesizing epoxy resin by oxidizing olefins, which can solve the problem of low catalytic efficiency, low product reaction efficiency, inability of the catalyst to completely separate out from the organic phase in the prior art to affect product quality, Catalysts cannot be recovered for recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] S1. Immobilize peroxyacetic acid to form an immobilized organic acid as a catalyst, and the immobilization temperature is 90° C.;

[0020] S2, dissolving the buffering agent in a halogenated hydrocarbon solvent, adjusting the pH value to 3 to form a medium acid buffering system, and the buffering agent is sodium dihydrogen phosphate;

[0021] S3. Dissolve α-hydroxypropionic acid, olefin, catalyst and buffer system, and heat up to 50°C under stirring to obtain a mixture. The olefin is styrene, styrene, acetic acid peroxide, sodium dihydrogen phosphate, and α-hydroxypropionic acid , The mass ratio of halogenated hydrocarbon solvent is 100:2:1:6:120;

[0022] S4. Cool down to 20° C. and fully cool to allow the catalyst to precipitate, then filter, put the filtered filtrate into a separatory funnel, separate the liquid at rest, separate the upper aqueous phase, take the organic phase, and recover by suction filtration and desolventization;

[0023] S5. Washing the reactant...

Embodiment 2

[0025] S1. Immobilize peroxyacetic acid to form an immobilized organic acid as a catalyst, and the immobilization temperature is 100° C.;

[0026] S2, dissolving the buffering agent in a halogenated hydrocarbon solvent, adjusting the pH value to 4 to form a medium acid buffering system, the buffering agent being sodium dihydrogen phosphate;

[0027] S3. Dissolve α-hydroxypropionic acid, olefin, catalyst and buffer system, and heat up to 100°C under stirring to obtain a mixture. The olefin is styrene, styrene, acetic acid peroxide, sodium dihydrogen phosphate, and α-hydroxypropionic acid , The mass ratio of halogenated hydrocarbon solvent is 100:4:3:9:150;

[0028] S4. Cool down to 50°C and fully cool to allow the catalyst to precipitate, then filter, put the filtered filtrate into a separatory funnel, separate the liquid at rest, separate the upper aqueous phase, take the organic phase, and recover by suction filtration and desolventization;

[0029] S5. Washing the reactant ...

Embodiment 3

[0031] S1. Immobilize peroxyacetic acid to form an immobilized organic acid as a catalyst, and the immobilization temperature is 95° C.;

[0032] S2, dissolving the buffering agent in a halogenated hydrocarbon solvent, adjusting the pH value to 4 to form a medium acid buffering system, the buffering agent being sodium dihydrogen phosphate;

[0033] S3. Dissolve α-hydroxypropionic acid, olefin, catalyst and buffer system, and heat up to 70°C under stirring to obtain a mixture. The olefin is styrene, styrene, acetic acid peroxide, sodium dihydrogen phosphate, and α-hydroxypropionic acid , The mass ratio of halogenated hydrocarbon solvent is 100:3:2:7:130;

[0034] S4. Cool down to 30°C and fully cool to allow the catalyst to precipitate, then filter, put the filtered filtrate into a separatory funnel, separate the liquid at rest, separate the upper aqueous phase, take the organic phase, and recover by suction filtration and desolventization;

[0035] S5. Washing the reactant wi...

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PUM

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Abstract

The invention discloses a method for synthesizing epoxy resin through olefin oxidation, and relates to the technical field of epoxy resin synthesis. The method comprises the following steps: immobilizing peroxyacetic acid to form immobilized organic acid as a catalyst; dissolving a buffer agent in a solvent, and adjusting the pH value to form a buffer system; dissolving alpha-hydracrylic acid, olefin, a catalyst and a buffer system, and performing heating while stirring to obtain a mixture; fully cooling the mixture to separate out the catalyst, performing filtering, putting filtered filtrate into a separating funnel, performing standing for separating liquid, separating out an upper water phase, taking an organic phase, performing suction filtration for desolvation, and performing recycling; and washing reactant with water and alkali until the reactant is neutral to obtain a product. The method has the advantages that: the catalyst is immobilized, the catalytic efficiency is higher, a buffering system is formed through the buffering agent, peroxide is prevented from being hydrolyzed in a double-oxidation system, the catalytic effect is better, the catalyst can be completely separated out from an organic phase, the catalyst can be completely recycled and reused, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of epoxy resin synthesis, in particular to a method for synthesizing epoxy resin by oxidizing olefins. Background technique [0002] Epoxy resin is a high molecular polymer with a molecular formula of (C11H12O3)n, which refers to the general term for a class of polymers containing more than two epoxy groups in the molecule. It is the polycondensation product of epichlorohydrin and bisphenol A or polyol. Due to the chemical activity of the epoxy group, a variety of compounds containing active hydrogen can be used to open the ring, cure and cross-link to form a network structure, so it is a thermosetting resin. [0003] The conversion of olefins needs to be catalyzed by catalysts. The catalysts usually use heteropolyacid compounds or special catalysts for synthesis. The synthesis process of synthetic catalysts is complicated and the reaction time is long. , the catalyst cannot be completely precipitated from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/02
CPCC08G59/027C08G59/022Y02P20/584
Inventor 穆学军梁烁孙永敢沈晶晶
Owner NANTONG SYNASIA NEW MATERIAL CO LTD