| 摘要 |
In the production of alpha -chloroacetoacetic acid monomethylamide by reaction of chlorine with acetoacetic acid monomethylamide in an aqueous medium at temperature of -20 to +10 DEG C. in the presence of urea and alkali metal salts, neutralization of the reaction mixture, separation of solid alpha -chloroacetoacetic acid monomethylamide and feeding back of the mother liquor into the next batch, yield and purity of the product are improved by extracting the mother liquor obtained each time after the separation of alpha -chloroacetoacetic acid monomethylamide, before the mother liquor is fed back into the next batch, with an inert solvent immiscible with water.
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