Abstract: In a process for preparing mevinolin by fermentation of a biomass in a fermentation liquor, which includes dissolving mevinolin from the biomass into the fermentation liquor, and separating the biomass from the fermentation liquor to obtain a separated fermentation liquor, separating the mevinolin from the separated fermentation liquor, and recovering the end product, the improvement which comprises carrying out the dissolving at a pH between about 7.5 and about 10, and the separating of the mevinolin is carried out at a pH between about 4.5 and about 1.

Abstract: A process for the preparation of high-purity deferoxamine salts from filtered fermentation liquors containing deferoxamine B as active ingredient by the adsorption of the active ingredient onto an ion exchange resin and the subsequent dissolution and purification thereof, which comprises carrying out the separation of the deferoxamine salt subsequent to the concentration of the eluate by salting out from an aqueous solution or from a mixture of water and an organic solvent and purifying it by repeated salting out and/or by methods known per se, and optionallya) preparing the methanesulfonate salt by known methods, orb) passing the aqueous solution of the deferoxamine salt trough an ion exchange resin containing methanesulfonate anions as counter ions and recovering the methanesulfonate salt from the effluent, preferably by lyophilization.