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本发明涉及到连续制备4-氯乙酰乙酰氯的方法,所述方法包括如下步骤:1)将双乙烯酮和氯进料至薄膜反应器,以及2)使双乙烯酮与氯反应以得到4-氯乙酰乙酰氯。本发明还涉及到用于由本发明方法得到的4-氯乙酰乙酰氯制备4-氯乙酰乙酸酯,4-氯乙酰乙酰胺或4-氯乙酰乙酰亚胺。
The present invention relates to a process for the continuous preparation of 4-chloroacetoacetyl chloride comprising the steps of 1) feeding diketene and chlorine to a thin film reactor, and 2) reacting diketene with chlorine to give 4-chloroacetyl acetoacetate Acid chloride. The present invention also relates to the preparation of 4-chloroacetoacetate, 4-chloroacetoacetamide or 4-chloroacetoacetimidate for use in 4-chloroacetoacetyl chloride obtained by the process of the present invention.