Process for preparation of stable aqueous solutions of zirconium

Details Process for preparation of stable aqueous solutions of zirconium Process for preparation of stable aqueous solutions of zirconium

1991-04-25

1993-01-26

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

C07F 700

Patent

active

051824086

ABSTRACT:
The present invention comprises reacting ammonium, sodium or potassium hydroxide or water soluble amines or amine derivatives with alpha-hydroxy carboxylic acid to prepare a neutral solution of the corresponding alpha-hydroxy carboxylic salt in a stoichiometric reaction.
The alkali metal, ammonium, amine or amine derivative, alpha-hydroxy carboxylic acid salt is then added to solutions of zirconium which may be zirconium oxychloride, zirconium hydroxy chloride, zirconium acetate and the like, ammonia, water soluble amines or amine derivatives, diisopropylamine or a mixture of two or more of these bases, as well as soluble carbonates and/or bicarbonates of ammonium and alkali metals such as sodium and potassium, while mixing the solutions. The procedure produces a mildly acidic or basic solution of the zirconium alpha-hydroxy carboxylic chelate.

REFERENCES:
patent: 4460751 (1984-07-01), Hanlon et al.
patent: 4477360 (1984-10-01), Almond
patent: 4692254 (1987-09-01), Kucera
patent: 4958038 (1990-09-01), Smeltz

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