Method for producing highly pure aqueous hydroxylamine...

Details Method for producing highly pure aqueous hydroxylamine... Method for producing highly pure aqueous hydroxylamine...

C - Chemistry, Metallurgy

01

B

C01B 21/14 (2006.01)

Patent

CA 2293319

The invention relates to a method for the production of highly pure aqueous solution from free hydroxylamine, wherein the diluted aqueous hydroxylamine solution is concentrated in a column, the vapor containing hydroxylamine is removed from the bottom of the column via a side-stream and highly pure hydroxylamine is obtained through condensation of the vapors. The inventive method is simple and mild, can be used in large-scale production and yields "electronic grade" hydroxylamine.

L'invention concerne un procédé de production d'une solution aqueuse d'hydroxylamine libre de grande pureté. Ce procédé consiste à concentrer la solution aqueuse d'hydroxylamine diluée dans une colonne, par soutirage de vapeurs contenant de l'hydroxylamine par le fond de la colonne à l'aide d'un moyen de soutirage latéral. On obtient ainsi par condensation un hydroxylamine de grande pureté à partir des vapeurs. Le procédé de l'invention, simple et doux, peut être appliqué à grande échelle et permet d'obtenir un hydroxylamine de "qualité électronique".

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