The invention relates to the field of
medicine purification, and in particular, relates to a
cefaclor impurity removal method which comprises the following steps: S1, weighing a
cefaclor compound, anddissolving the compound in an
organic solvent; S2, filtering and separating the
organic solvent, and extracting the
organic solvent containing
cefaclor; S3, adjusting the acid-base value of the organic
solvent and adjusting the temperature of the organic
solvent, and performing secondary
filtration by utilizing an adsorbate; S4, putting the adsorbate into a
mixed solution of a low-carbon solventand water, and crystallizing cefaclor adsorbed on the adsorbate. According to the cefaclor
impurity removal method, cefaclor impurities are put in the organic
solvent for dissolving, cefaclor insoluble in water can be dissolved in the organic solvent, the organic solvent of cefaclor is separated, filtered and extracted, the pH value is controlled, cefaclor particles with low
impurity content are obtained, and the occurrence rate of
allergic reaction possibly caused by excessive impurities of medicines is reduced.