Zinc recovery from acidic aqueous streams

Details Zinc recovery from acidic aqueous streams Zinc recovery from acidic aqueous streams

1974-07-26

1976-09-21

Vertiz, Oscar R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iib metal

423 24, 423622, C01G 902

Patent

active

039819663

ABSTRACT:
A process for the recovery of metal values, principally zinc and copper, from an aqueous acidic purge stream in a hydrometallurgical process by contacting the stream containing the iron, copper and zinc sulfates, along with trace amounts of other metallic sulfates with calcium oxide to bring the pH in the range 3.0-4.0, thence with sufficient ammonia to form the soluble tetrammine sulfates of copper and zinc, then separating the copper from the zinc, e.g. by hydroxy oxime-solvent extraction and thereafter recovering the zinc as zinc oxide by converting the zinc tetrammine sulfate to the hydroxide and removing ammonia from the complex.

REFERENCES:
patent: 1154602 (1915-09-01), Best
patent: 1331334 (1920-02-01), Field
patent: 2128311 (1938-08-01), Mertes
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patent: 3453072 (1969-07-01), Vian-Ortuno et al.
patent: 3794719 (1974-02-01), Lowenhaupt et al.
C.I.M. Bulletin, Feb., 1975, pp. 105, 106, 113, (Ritcey et al.).
Fletcher et al., "Napthenic Acid as a Liquid-Liquid Extraction Reagent for Metals" Inst. Mining & Metallurgy, England 1961, pp. 355, 365.

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