The invention discloses a preparation method of environment-friendly and high-purity
sulpiride. The preparation method comprises the following steps of preparation of a crude product; activation of
bamboo charcoal, wherein, in the activation process of the
bamboo charcoal, fermenting bamboo
powder by adopting EM (
Effective Microorganism) bacterial liquid,
drying, crushing, immerging in a
sodium hydroxide solution, standing, filtering,
drying, sending into a vacuum box, activating at a high temperature, washing until being neutral,
drying and crushing, so that activated
bamboo charcoal is obtained; purification of the coarse product: in the purification process of the crude product, adding absolute ethyl
alcohol into the crude product, refluxing at a temperature of 80 to 100 DEG C, coolingthe temperature to 0 to 2 DEG C, filtering, adding an ethyl
alcohol solution with a concentration of 80wt% to 95wt%, refluxing at the temperature of 80 to 100 DEG C, adding the activated bamboo
charcoal, continuously refluxing, ultrasonically treating, filtering, crystallizing, and carrying out
vacuum drying, so that the environment-friendly and high-purity
sulpiride is obtained. A product obtained by the preparation method is high in purity and yield; the preparation technique is simple; the use level of an
organic matter in a preparation process is low; in addition, the ethyl
alcohol in a rejected material is easily recovered and can be further repeatedly utilized; the waste to a resource and the
pollution to an environment can be reduced, and the preparation method is safe and environment-friendly.