SE100373C1 - - Google Patents

Claims (1)

Patent claim: 1: o) Examination of technically pure copper sulphate from telmic copper salt solutions, containing sodium sulphate and sodium chloride and also as impurities other heavy metals, e.g. Cd, Co, Ni, Mn and Zn, can be drawn from the fact that one. separates the copper so]. sodium sulphate-copper sulphate-double salt, CuSO4 * Na2SO -21120, preferably in acidic fermentation, Over the double temperature of the salt of the double salt, in installing the ratio of copper sulphate: sodium sulphate so that —3 at least 1 mole of sodium sulphate separates the double salt from the mother liquor, slurries it in a large amount of acidified water and split mother liquor obtained during the decomposition of the double salt which is necessary to form the sulphates, decomposes the double salt grout by cooling under its resistance temperature in the components copper sulphate and sodium sulphate and mechanically separates s8, erMilan crystalline cleavage products. 2: o) Embodiment of the set according to patent claim 1: o), characterized in that when processing zinc-containing liquors, in which the zinc is an essential component, boil salt until attes, whereby the precipitation of the zinc as zinc sulphate sodium sulphate double salt, ZnSO, • Na , SO4 • 41 {20, avoided. and Stockholm 1940. Kungl. Boktr. P. A. Norstedt & SBner 400089