Process for the purification of solutions containing a sodium or

Details Process for the purification of solutions containing a sodium or Process for the purification of solutions containing a sodium or

1981-11-23

1984-05-29

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 11, 423 15, 423 17, 423 1, 423 65, 423165, 423199, 423206R, C01G 3906, C01F 1118, C01D 500

Patent

active

044514395

ABSTRACT:
A process for the purification of solutions containing sodium or potassium carbonate, sulphate, hydroxide or hydrogen carbonate, and mainly at least one of the metals belonging to the group formed by vanadium, uranium or molybdenum, in the form of sodium or potassium salts, and inorganic and/or organic impurities, wherein the above-mentioned solutions are completely or partially caustified by the addition of an adequate amount of lime, whereby a first precipitate essentially containing calcium carbonate is separated, and the separated liquor is concentrated by evaporation until the hydroxide content is at most equal to 50%, to cause the production of a second precipitate which essentially comprises sodium or potassium sulphate, then, after separation thereof, a hydroxide-rich liquor is collected.
This process is more particularly adapted for treatments of liquors resulting from the alkaline attach of vanadiferous and uraniferous ores.

REFERENCES:
patent: 2813003 (1957-11-01), Thunaes et al.
patent: 2815263 (1957-12-01), Eldredge
patent: 2949339 (1960-08-01), Marvin
patent: 2982602 (1961-05-01), Sherk et al.
patent: 3112275 (1963-11-01), Pollock et al.
patent: 3130460 (1964-04-01), Martin
patent: 3227515 (1966-01-01), Reusser
patent: 3288569 (1966-11-01), Henrickson et al.
patent: 3306714 (1967-02-01), Goren
patent: 4024216 (1977-05-01), Finch et al.

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