Process for purifying pravastin sodium from a fermentation broth

摘要

A process for purifying pravastatin sodium comprising the steps of: a. clarifying a fermentation broth containing pravastatin sodium to obtain a clear solution; and adjusting the clear solution to be basic having pH value ranging from pH 10 SIMILAR 13; b. adsorbing the pravastatin sodium with non-ionic resin; eluting the pravastatin sodium by water-soluble organic solvent; and forming a concentrate of pravastatin sodium; c. treating the concentrate with water-soluble anti-solvent or inorganic salt to form a precipitate of pravastatin sodium; and d. recrystallizing the precipitate for making pravastatin sodium crystal with high purity and high yield.