Applexion

Marc-Andrè Theoleyre

A method is provided for decalcification of an aqueous solution that has multivalent Caand Mgcations and anions able to form complexes with at least a part of the multivalent cations. The method includes replacing at least part of the anions to form complexes of the aqueous solution by monovalent anions such as Cl, non-able to form such complexes. The method also replaces at least a part of the multivalent cations of the aqueous solution by monovalent metal cations such as Naand/or K. This later replacement step is performed simultaneously with or after the first replacement step.

Method for decalcification of an aqueous solution, in particular of lactoserum or of an utrafiltration permeate lactoserum

A purification method employs nanofiltration of an aqueous solution containing one or several sugars, multivalent cations, monovalent metal cations, monovalent anions and multivalent inorganic anions and/or organic acid anions. The method includes replacement of at least a part of said multivalent cations and/or said multivalent inorganic anions and organic acid anions respectively by monovalent metal cations and/or monovalent anions to produce a solution. Nanofiltration of the solution is carried out to obtain a retentate, and at least part of the retentate is subject to crystallization.

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Marc-Andrè Theoleyre