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Synthetic method and application of glycidyl methacrylate

A technology of glycidyl ester and methacrylic acid, which is applied in the field of synthesis of glycidyl methacrylate, can solve the problems of large recovery solvent loss and complicated process, and achieve the effects of increasing income, simple synthesis, and mild conditions

Pending Publication Date: 2021-03-26
SHENZHEN PRECHEM FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The synthesis method of glycidyl methacrylate GMA is generally to complete the formation of sodium methacrylate, dehydration and reaction with epichlorohydrin to form glycidyl methacrylate in the same reactor under the action of methacrylic acid. method, this method can well remove the water produced by the reaction in time by adding a solvent with a low boiling point and water for azeotropic dehydration. However, the disadvantage of this one-step method is that the introduction of other solvents makes the process complicated, and the loss of the recovered solvent is large. And produce a large amount of waste water; For these defects, it is necessary to design a kind of synthetic method and application of glycidyl methacrylate

Method used

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  • Synthetic method and application of glycidyl methacrylate

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Embodiment 1

[0028] A synthesis method and application of glycidyl methacrylate, including step 1, synthesis reaction; step 2, recycling and refining; step 3, collecting fractions; step 4, finishing cooling; step 5, storing and placing;

[0029] Wherein in above-mentioned step one, synthetic reaction comprises the following steps:

[0030] 1) Manually prepare a 500L stirred tank, add 108kg sodium methacrylate, 270kg epichlorohydrin and 1.5kg PEG400, the molar ratio of epichlorohydrin to sodium methacrylate is 1.0:0.8-3.0, and the catalyst is methane 0.3-4% of sodium acrylate;

[0031] 2) Warm up to 60°C under stirring, keep warm for 5 hours, and the reaction is complete;

[0032] Wherein in above-mentioned step 2, recovering refining comprises the following steps:

[0033] 1) after the completion of the reaction, open the vacuum vacuum rectification to 10mmHg;

[0034] 2) Start the tower kettle to stir and heat up to reflux, adjust the reflux ratio;

[0035] Wherein in above-mentioned ...

Embodiment 2

[0041] A synthesis method and application of glycidyl methacrylate, including step 1, synthesis reaction; step 2, recycling and refining; step 3, collecting fractions; step 4, finishing cooling; step 5, storing and placing;

[0042] Wherein in above-mentioned step one, synthetic reaction comprises the following steps:

[0043] 1) Manually prepare a 500L stirred tank, add 108kg sodium methacrylate, 270kg epichlorohydrin and 1.5kg PEG800, the molar ratio of epichlorohydrin to sodium methacrylate is 1.0:0.8-3.0, and the catalyst is methyl 0.3-4% of sodium acrylate;

[0044] 2) Warm up to 60°C under stirring, keep warm for 5 hours, and the reaction is complete;

[0045] Wherein in above-mentioned step 2, recovering refining comprises the following steps:

[0046] 1) after the completion of the reaction, open the vacuum vacuum rectification to 10mmHg;

[0047] 2) Start the tower kettle to stir and heat up to reflux, adjust the reflux ratio;

[0048] Wherein in above-mentioned s...

Embodiment 3

[0054] A synthesis method and application of glycidyl methacrylate, including step 1, synthesis reaction; step 2, recycling and refining; step 3, collecting fractions; step 4, finishing cooling; step 5, storing and placing;

[0055] Wherein in above-mentioned step one, synthetic reaction comprises the following steps:

[0056] 1) Manually prepare a 500L stirred tank, add 108kg sodium methacrylate, 270kg epichlorohydrin and 1.5kg PEG1000, the molar ratio of epichlorohydrin to sodium methacrylate is 1.0:0.8-3.0, and the catalyst is methane 0.3-4% of sodium acrylate;

[0057] 2) Warm up to 60°C under stirring, keep warm for 5 hours, and the reaction is complete;

[0058] Wherein in above-mentioned step 2, recovering refining comprises the following steps:

[0059] 1) after the completion of the reaction, open the vacuum vacuum rectification to 10mmHg;

[0060]2) Start the tower kettle to stir and heat up to reflux, adjust the reflux ratio;

[0061] Wherein in above-mentioned ...

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Abstract

The invention discloses a synthetic method and an application of glycidyl methacrylate. The synthetic method comprises the following steps: step 1, performing a synthetic reaction; step 2, recycling and refining; step 3, collecting fractions; step 4, cooling the material; and step 5, storing and placing; wherein in the above step, a 500 L stirring kettle is manually prepared, and 108 kg of sodiummethacrylate, 270 kg of epoxy chloropropane and 1.5 kg of a catalyst are added; according to the synthesis method and the application of glycidyl methacrylate, the raw materials are cheap and easy toobtain, synthesis is simple, conditions are mild, no three wastes are generated in the process, the quality is stable and controllable, the yield is high, epoxy chloropropane and sodium methacrylate are adopted as the raw materials in the synthesis step to react in the presence of a catalyst, and operation is easy and convenient; the epoxy chloropropane front fraction obtained by rectification canparticipate in the next reaction, so that material circulation is realized, the cost is saved, and the yield is improved; and the obtained solid sodium chloride can be washed with epoxy chloropropane, dried and packaged to be sold as a by-product, so that the income is obviously increased.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis production, in particular to a synthesis method and application of glycidyl methacrylate. Background technique [0002] Glycidyl methacrylate GMA is an important chemical raw material, because of its highly active structure such as double bonds and epoxy groups in the molecule, it is mainly used in the modification of polymer materials, such as coatings, rubber, resins, fibers and Adhesives, and pharmaceutical intermediates, morphoids and other fields; [0003] The synthesis method of glycidyl methacrylate GMA is generally to complete the formation of sodium methacrylate, dehydration and reaction with epichlorohydrin to form glycidyl methacrylate in the same reactor under the action of methacrylic acid. method, this method can well remove the water produced by the reaction in time by adding a solvent with a low boiling point and water for azeotropic dehydration. However, the disadvanta...

Claims

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Application Information

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IPC IPC(8): C07D301/30C07D303/16
CPCC07D301/30C07D303/16Y02P20/584
Inventor 张春雨蓝俊杰
Owner SHENZHEN PRECHEM FINE CHEM CO LTD
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