Process Research on Continuous Synthesis of Aminoacetic Acid in Microreactor
At present,most of the production processes of aminoacetic acid in China are kettle batch process,but this process has some problems,such as low production efficiency,low product quality,easy leakage of ammonia gas and more manual use in each section.The microreactor adopts continuous flow reaction,which can accurately control the temperature and time of the reaction,has extremely high heat exchange efficiency,and can effectively avoid the shortcomings of the kettle reaction.In this study,LT-type microchannel reactor was selected as the reaction vessel,and 3.00 kg of chloroacetic acid aqueous solution with mass fraction of 81.50%,1.15 kg of urotropine aqueous solution with mass fraction of 25.00%and 0.70 kg of water replenishment were used as raw materials.Through the con-trol variable experimental method,it was measured that the reaction could be efficiently synthesized under the conditions of temperature of 70±2℃,pressure of 0.8 MPa,pH of 6.0±0.2,and chloro-acetic acid flow rate of 48 mL·min-1,with a yield of 90.20%.The results show that the continuous production of aminoacetic acid by microreactor can improve the degree of automation of production,im-prove the reaction efficiency,and save manpower.
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