Process for preparing stable copper (ii)- sulfate...

Details Process for preparing stable copper (ii)- sulfate... Process for preparing stable copper (ii)- sulfate...

C - Chemistry, Metallurgy

01

G

23/89

C01G 3/10 (2006.01) A23K 1/175 (2006.01)

Patent

CA 1143539

ABSTRACT OF THE DISCLOSURE The invention relates to an improved process for the production of practically non-hygroscopic, easily grind- able copper (II) sulfate monohydrate which is stable even in finely ground state and can be applied as trace element additive in animal fodders, by neutralizing the free sulfurio acid content of copper (II) sulfate pentahydrate with sodium, potassium or ammonium hydroxide, carbonate or hydrocarbonate (further on? alkaline agent) and removing four moles of its crystal water content by drying at 80 to 150°C for at least 30 minutes. The improvement according to the invention consists in that copper (II) sulfate pentahydrate, melted in its own crystal water, is treated with 3 to 20 % by weight, preferably 5 to 8 % by weight, of an alkaline agent calculat- ed as sodium carbonate for the weight of the copper (II) sulfate pentahydrate, over the stoichiometric amount required to neutralize the free sulfuric acid content. By the method of the invention stabilized copper (II) sulfate monohydrate can be prepared on industrial scale directly from copper (II) sulfate pentahydrate, a cheap start- ing substance. The process can be performed very easily and economically.

353874

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