Process for producing high purity lithium carbonate

Details Process for producing high purity lithium carbonate Process for producing high purity lithium carbonate

1978-03-27

1980-06-10

Gantz, Delbert E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

423421, 423641, C01D 1508, C01D 1502

Patent

active

042072972

ABSTRACT:
A continuous integrated process for the production of lithium hyroxide monohydrate and high purity lithium carbonate of large average particle size comprising converting impure lithium carbonate to lithium hydroxide by a causticization step, separating precipitated calcium carbonate from the resulting lithium hydroxide solution, precipitating lithium hydroxide monohydrate from a major portion of the lithium hydroxide solution and recovering same, introducing carbon dioxide or lithium carbonate to the remaining minor portion of the lithium hydroxide solution to precipitate additional calcium as calcium carbonate, separating the precipitated calcium carbonate from the lithium hydroxide solution, introducing carbon dioxide to the lithium hydroxide solution to precipitate high purity lithium carbonate of large average particle size, separating and recovering said lithium carbonate from the resulting lithium carbonate solution, and recycling said lithium carbonate solution to said causticization step.

REFERENCES:
patent: 2413644 (1946-12-01), Nicholson
patent: 2940820 (1960-06-01), Mazza et al.
patent: 3007771 (1961-11-01), Mazza et al.
Hader, R. N. et al., Lithium and its Compounds, I and EC, Dec. 1951, pp. 2636-2646, particularly 2642-2643.

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