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Beta-hydroxyalkylamide synthesis process

A technology of hydroxyalkylamide and synthesis process, applied in the field of β-hydroxyalkylamide synthesis technology, can solve the problems of low production efficiency, complicated production process, low separation efficiency, etc., and achieves improved utilization rate and product yield, The effect of overcoming many processes and improving work efficiency

Inactive Publication Date: 2016-05-04
赵建英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current synthesis process of β-hydroxyalkylamide synthesis process, the process flow is not easy to implement, the separation efficiency is low, the recycling of raw materials cannot be realized, the production process is complicated, and the production efficiency is low

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0011] The β-hydroxyalkyl amide synthetic technique of the present embodiment, comprises the following steps:

[0012] (1) Put 90 parts of diethanolamine and 0.9 parts of white carbon black into the β-hydroxyalkylamide synthesis reactor, and add 2.36 parts of multi-component composite catalyst to the reactor;

[0013] (2) After the feeding is completed, first pass through the argon gas for replacement three times, then extract the gas in the kettle, control the temperature of the material in the kettle to 100°C, and the stirring speed to 110 rpm, and then add 135.83 parts of adipic acid di Methyl ester, added dropwise in 1-2 hours;

[0014] (3) After the addition of dimethyl adipate is completed, control the temperature in the heating tank to 110°C, stir at 42-55 rpm, react for 4 hours, cool down to 80°C and react for 1 hour, then slowly raise the temperature At 140°C, argon gas is introduced at the same time, the stirring is controlled at 80 rpm, the temperature is naturally...

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PUM

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Abstract

The present invention discloses a beta-hydroxyalkylamide synthesis process, which comprises: pouring diethanolamine and carbon black into a reaction kettle, adding a multi-component composite catalyst to the reaction kettle, introducing argon gas, replacing three times, pumping out the gas in the tank to achieve a negative pressure, adding dimethyl adipate into the reaction kettle in a dropwise manner under stirring, carrying out heating twice and continuously stirring while introducing argon gas, and naturally cooling the product to obtain the finished product beta-hydroxyalkylamide. According to the present invention, the process has advantages of reasonable process, reliable performance and the like; under the effects of the multi-component composite catalyst, the diethanolamine performs aminolysis on the dimethyl adipate to prepare the beta-hydroxyalkylamide, wherein sodium carbonate can provide the reaction accelerating effect, and sodium sulfite and sodium citrate have the anti-yellowing effect; and the beta-hydroxyalkylamide synthesis reaction kettle has characteristics of reasonable structure, good temperature control and good stirring effect, the reaction is performed in the kettle under the segmental temperature control, and the synthesis process can meet the requirements of the large-scale production.

Description

technical field [0001] The invention belongs to the field of chemical technology, and in particular relates to a synthesis process of β-hydroxyalkylamide. Background technique [0002] The synthesis process of β-hydroxyalkylamides at least includes basic processes such as stirring, condensation, and replacement. In the current synthesis process of β-hydroxyalkylamide synthesis process, the process flow is not easy to implement, the separation efficiency is low, the recycling of raw materials cannot be realized, the production process is complicated, and the production efficiency is low. Contents of the invention [0003] In order to overcome the above-mentioned technical problems existing in the prior art, the object of the present invention is to provide a synthesis process of β-hydroxyalkylamides. The present invention not only has a simple production process, improves work efficiency, but also ensures product quality. [0004] The synthesis technique of β-hydroxyal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/02C07C233/18
Inventor 赵建英
Owner 赵建英