The invention discloses a preparation method of
pantoprazole sodium enteric-
coated tablets, and relates to the technical field of
pantoprazole sodium enteric-
coated tablets, and the preparation method comprises the following preparation steps: step 1, preparing
pantoprazole sodium; 2, the raw materials are sieved by a 120-200-mesh
sieve and then mixed for 15-25 min, and a pre-mixture is obtained; step 3, taking out the premixture with the
mass being 2.5-3.5 times that of the
magnesium stearate, mixing the premixture with the
magnesium stearate for 3-5 minutes, sieving through a 120-200-mesh
sieve, and continuously stirring and mixing for 5-10 minutes; and step 4, tabletting and
coating to obtain the
pantoprazole sodium enteric-coated tablet. According to the preparation method of the
pantoprazole sodium enteric-coated tablet, 2-chloromethyl-3, 4-dimethoxypyridine
hydrochloride and 5-difluoromethoxy-2-sulfydryl-1H-
benzimidazole are taken as starting materials to synthesize
pantoprazole sodium, the total yield of the product is 67.3% on average, the purity of the pantoprazole sodium is 99.95% on average, the purity of the pantoprazole sodium is 99.95% on average, and the purity of the pantoprazole sodium is 99.95% on average. Materials and reagents used in the synthesis process are materials for industrial production, low in price and easy to obtain, the synthesis process is simple to operate, and the synthesized pantoprazole sodium is high in purity and good in stability.