Method for continuously synthesizing dimethyl diallyl ammonium chloride

• Main Authors: LIU ZHUO, GUAN QINGBAO, ZHAO FUBAO, GU WEIJING, ZHANG WEI, HUANG WEI
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2020
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention relates to a method for continuously synthesizing dimethyl diallyl ammonium chloride, which comprises the following steps: adding a dimethylamine aqueous solution, a sodium hydroxide solution and chloropropene into a microreactor, and standing in the microreactor for 5-15 minutes, with the temperature being controlled to be 30-70 DEG C; then collecting reaction liquid, standing for layering, standing and layering the reaction liquid, separating the liquid, taking a lower-layer water phase, adjusting the pH value of the water phase to be 4-6 by using diluted hydrochloric acid, andfiltering to remove precipitated sodium chloride, so as to obtain clarified liquid; and carrying out reduced pressure distillation on the clarified liquid to remove impurities in the water phase, andfiltering again to remove precipitated sodium chloride, thereby obtaining a dimethyl diallyl ammonium chloride solution. According to the method, the problems of repeated heating, cooling, alternatefeeding, difficult temperat