Process for the preparation of glucosamine salts

A - Human Necessities – 61 – K

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A61K 31/70 (2006.01) C07H 5/06 (2006.01)

Patent

CA 2470665

This invention relates to a process for the preparation of glucosamine sulphate, glucosamine hydroiodide, glucosamine pyruvate, glucosamine phosphate or their mixtures with glucosamine hydrochloride, by electrodialysis. Starting from glucosamine hydrochloride, the exchange of the CI- anion for an anion selected from the group consisting of SO42-, I-, CH3COCOO- and PO43- takes place during the process. The electrodialysis, that comprises a cathode, anode and means of separation composed of anion exchange membranes, cation exchange membranes, bipolar membranes or by other suitable means of separation. This invention also refers to a glucosamine sulphate containing chlorides obtainable by the process, and its therapeutical use.

L'invention concerne un procédé pour préparer par électrodialyse du sulfate de glucosamine, du iodure hydrique de glucosamine, du pyruvate de glucosamine, du phosphate de glucosamine ou leur mélange avec de l'hydrochlorure de glucosamine. A partir de l'hydrochlorure de glucosamine, l'échange de l'anion Cl?-¿ contre un anion sélectionné dans le groupe comprenant SO¿4??2-¿, I?-¿, CH¿3?COCOO?-¿ et PO¿4??3-¿ a lieu durant le procédé. L'électrodialyse est réalisée dans un électrodialyseur ou dans un empilement d'électrodialyse comportant une cathode, une anode et des dispositifs de séparation constitués de membranes échangeuses d'anions, de membranes échangeuses de cations, de membranes bipolaires ou d'autres dispositifs de séparation adaptés. La présente invention porte également sur un sulfate de glucosamine contenant des chlorures et pouvant être obtenu selon ledit procédé, ainsi que sur son utilisation thérapeutique.

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