Title:
PROCESSES FOR PREPARING HIGHLY PURE LITHIUM CARBONATE AND OTHER HIGHLY PURE LITHIUM-CONTAINING COMPOUNDS
Document Type and Number:
Japanese Patent JP2022036933
Kind Code:
A
Abstract:
To provide a method for producing highly pure lithium carbonate using alternative brine sources such as geothermal, oilfield and relict hydrothermal brines, which have been difficult to exploit conventionally.SOLUTION: The method includes reacting a raw material aqueous solution that includes Li2CO3 with CO2 to form a reaction aqueous solution comprising dissolved LiHCO3. Unreacted CO2 and insoluble compounds are separated from the reaction aqueous solution. Dissolved impurities are removed from the reaction aqueous solution by contacting the reaction aqueous solution with an ion selective medium to produce a final aqueous solution. The highly pure Li2CO3 is precipitated from the final aqueous solution to be recovered, in which the precipitated Li2CO3 has a purity of at least about 99.99%.SELECTED DRAWING: None
Inventors:
STEPHEN HARRISON
ROBERT BLANCHET
ROBERT BLANCHET
Application Number:
JP2021171651A
Publication Date:
March 08, 2022
Filing Date:
October 20, 2021
Export Citation:
Assignee:
ALL AMERICAN LITHIUM LLC
International Classes:
C01D15/08; B01D61/02; B01D61/14; B01D61/58; B01D65/06; B01J39/07; B01J39/20; B01J45/00; B01J47/02; B01J49/06; B01J49/53; B01J49/60; C02F1/44
Domestic Patent References:
| JP2020055741A | 2020-04-09 | |||
| JP2001525313A | 2001-12-11 | |||
| JP2005144315A | 2005-06-09 | |||
| JPH03245824A | 1991-11-01 |
Attorney, Agent or Firm:
Asamura patent office
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