2-methyl-4-chlorophenoxyacetic acid preparation technology
A technology of chlorophenoxyacetic acid and sodium chlorophenoxyacetic acid, applied in the field of 2-methyl-4-chlorophenoxyacetic acid preparation technology, can solve problems such as work clothes damage, waste, high flammability, etc., and achieves increased safety, improved The effect of utilization
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[0022] figure 2 The structural diagram shown mainly includes a condensation reaction kettle 1 , an enamel reaction kettle 2 , an enamel condenser 3 , and a platinum resistance thermometer 4 .
[0023] A kind of 2-methane-4-chlorophenoxyacetic acid preparation technology of the present invention mainly comprises the following steps:
[0024] a. Dissolve chloroacetic acid in water for later use, and the mixing ratio of the two is 1:1.
[0025] b. Place o-cresol and sodium hydroxide in the condensation reactor for deployment, ensuring that the ratio of the two is 5:1, the reaction temperature is 55°C-65°C, the optimal reaction time is 0.4h-0.6h, and finally An aqueous solution of sodium o-cresate was obtained.
[0026] c. After the above reaction in b, drop the chloroacetic acid solution obtained in a to ensure that the ratio of the chloroacetic acid solution to the o-cresol sodium aqueous solution is 1.05:1, the reaction temperature is 110°C-130°C, and the optimum reaction ti...
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