| 摘要 |
Copper sulfate, sodium hydroxide and aqueous ammonia are mixed at a pH of 10 to 12.5, the reaction mixture containing 3 to 10 grams of ammonia per liter of reaction mixture. The reactants may be fed to the reaction zone as separate streams or, if desired, the copper sulfate solution and the aqueous ammonia may be initially mixed and fed together to the reaction zone for mixture with the sodium hydroxide. The reaction temperature is maintained at less than 112 DEG F. and the retention time is controlled so as to avoid the undesired decomposition of the cupric hydroxide product to copper oxide. The product thus obtained comprises an essentially pure cupric hydroxide product suitable for use as a chemical intermediate. In addition, the product obtained at a pH of above about 11.7 has a particle size sufficiently small so as to make the product highly suitable for use as a fungicide.
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