Process for the elimination of chloride from zinc sulphate solut

Details Process for the elimination of chloride from zinc sulphate solut Process for the elimination of chloride from zinc sulphate solut

1975-06-17

1977-01-25

Vertiz, Oscar R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 46, 423103, 423493, 423544, C01G 304

Patent

active

040051749

ABSTRACT:
A process for removing chlorine from a solution of zinc sulfate, in which the pH of the solution is reduced to below 2.6 with sulfuric acid. Cupric ions are established in the solution in an amount such that after removal of the chlorine by precipitation as cuprous chloride, there remains an excess of cupric copper in the solution which is greater than 0.5 g/l. The cupric ions can be added by adding cupric sulphate and zinc powder, or cupric salt and metallic copper, or cupric copper followed by cuprous oxide. The cuprous chloride precipitate is collected and washed and treated with sodium hydroxide in an amount to raise the pH to more than 7, thereby to precipitate cuprous oxide which is separated by filtration.

REFERENCES:
patent: 1901925 (1933-03-01), O'Brien et al.
patent: 2586579 (1952-02-01), Supiro

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