Recovery method of distillation still residue in preparation of acyl chloride from solid organic acid

The invention relates to a method for recovering distillation still residues in preparation of acyl chloride from solid organic acid, which comprises the following steps: mixing the distillation still residues with a first inorganic acid solution for hydrolysis reaction to dissociate acyl chloride and acid anhydride in the distillation still residues to form organic acid, then mixing with an organic extractant to obtain an organic acid crude product solution, mixing with alkali liquor to form organic salt, and performing liquid separation, acidification and extraction to obtain an organic acid solution; the organic acid solution obtained by the recovery method can be applied to the preparation process of acyl chloride, the resource utilization of distillation still residues can be realized, the generation of solid wastes in the preparation process of acyl chloride is reduced, and the process cost is reduced. 本发明涉及一种固体有机酸制备酰氯的蒸馏釜残的回收方法，所述回收方法包括将蒸馏釜残与第一无机酸液混合进行水解反应，使得蒸馏釜残中的酰氯和酸酐解离形成有机酸，之后与有机萃取剂混合，得到有机酸粗品溶液，之后与碱