Method of producing lactose from whey or a permeate resulting from the ultrafiltration of whey.

摘要

Production method of lactose from whey or a permeate from ultrafiltration resulting lactoserum, comprising this whey and permeate monovalent cations Na + and K +, monovalent anions Cl-, polyvalent cations Ca2 + and Mg2 + and multivalent inorganic anions such as phosphate anions and / or organic acid anions able to form complexes with said multivalent such as lactate and citrate, characterized in that it comprises the operations of cations: (a) replacing at least part of the multivalent cations of the whey or permeate by metal cations monovalent to obtain a whey or permeate depleted in multivalent cations, (b) replacing at least part of the multivalent inorganic anions and organic acid anions of the whey or permeate by monovalent anions unable to form complexes with the multivalent cations, this operation being effected (b) simultaneously with operation n (a) above, in which case results in a whey or permeate depleted in multivalent inorganic anions, in organic acid anions and in multivalent cations, either before said step (a), in which case results in a whey or permeate depleted in multivalent inorganic anions and organic acid anions and (c) crystallizing said whey or permeate resulting from the preceding operations and depleted in multivalent inorganic anions, in organic acid anions and in multivalent cations, for lactose crystallized and mother liquor enriched in monovalent metal cations, this crystallization being preceded, if necessary, by a concentration to the desired degree of said whey or permeate.