Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Iron group metal
Patent
1973-07-23
1978-02-14
Vertiz, O. R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Iron group metal
423101, 423561R, 423561B, C01G 5100, C01G 5300
Patent
active
040738604
ABSTRACT:
A process for the precipitation of metallic sulfides, e.g., nickel, cobalt or zinc sulfides, from aqueous metal-ion-containing solution comprising passing hydrogen sulfide through the metal-containing solution while the solution is at a temperature of about 75.degree. C. and at a pH of about 2 to about 3 and maintaining said pH during the time of hydrogen sulfide addition by continuous addition of alkali to the solution. The precipitated metal sulfide is characterized by a relatively large particle size by a high settling rate and by ease of filterability.
REFERENCES:
patent: 2722480 (1955-11-01), Roy
Spitchenko et al., "Physical-Chemical Principles of Ni and Co Sulfide Precipitation from Ferriginous Solutions," Chem. Abstracts, vol. 69, 1968, #100048q.
Fresenius; "Quantitative Chemical Analysis," John Wiley & Sons; New York, N.Y., 1891, pp. 161, 163.
Welcher, Editor, "Standard Methods of Chemical Analysis," 6th Ed., vol. II, Part A; D. Van Nostrand Co.; Princeton, N.J., 1963, pp. 98-99.
Wadsworth et al., Ed., "Unit Processes in Hydrometallurgy," Gordon & Breach, New York, N.Y.; 1964, appropriate pp. 593-615.
Huggins David A.
Nissen Norman C.
Hearn Brian E.
MacQueen Ewan C.
Mulligan, Jr. Francis J.
The International Nickel Company Inc.
Vertiz O. R.
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