Reextraction purification method and device for crude product after sublimation of maltol or ethyl maltol

The invention discloses a re-extraction purification method for a crude product after sublimation of maltol or ethyl maltol. The method comprises the following steps: step 1, heating the crude product after sublimation of maltol or ethyl maltol and water to 80 +/-5 DEG C, and dissolving materials; step 2, layering and standing the material obtained in the step 1, separating an upper-layer aqueous solution, and cooling the upper-layer aqueous solution layer to 10-15 DEG C; and step 3, centrifuging to obtain purified maltol or ethyl maltol crystals. The invention further discloses a purification device. According to the purification technical scheme, the yield is high, and the product purity is high. 本申请公开了一种麦芽酚或乙基麦芽酚升华后粗品反萃取提纯方法，包括以下步骤：步骤1：将麦芽酚或乙基麦芽酚升华后粗品与水加热至80±5℃进行溶料；步骤2：将步骤1所获得的物料分层静置，分离上层水溶液后，将上层水溶液层温度降至10℃-15℃；步骤3：离心得到除杂后的麦芽酚或乙基麦芽酚晶体。还公开了一种提纯装置。本申请提纯技术方案产率高，产品纯度高。