SELECTIVE LITHIUM RECOVERY AS LITHIUM CARBONATE FROM NATURAL BRINES

    公开(公告)号:US20180222761A1

    公开(公告)日:2018-08-09

    申请号:US15728784

    申请日:2017-10-10

    IPC分类号: C01D15/08 C22C24/00

    摘要: Embodiments relate to methods, systems And apparatus tor generating lithium from brine. The brine is heated in a first vessel to greater than 260° C. and CO2 gas is injected mixing with the brine such that the CO2/P is greater than 18 g/atm. The brine is held at greater than 18 g/atm for longer than 20 minutes so that any impurities precipitate as solids leaving only lithium ions and chlorine ions. The brine is moved to a second vessel screening out solid precipitates leaving a brine containing only chlorine and lithium. CO2 gas is injected and mixed with the brine at 260° C. so that the CO2/P is greater than 200 g/atm. The brine is held at greater than 200 g/atm for longer than 20 minutes suppressing the chlorine as dissolved ions while lithium precipitates out as lithium carbonate. The lithium carbonate precipitate is removed from the brine solution.

    SELECTIVE MATERIAL RECOVERY FROM NATURAL BRINES

    公开(公告)号:US20210047196A1

    公开(公告)日:2021-02-18

    申请号:US16537985

    申请日:2019-08-12

    摘要: Embodiments relate to methods for generating selected materials from a natural brine. A natural brine comprising at least a portion of a selected material is heated. CO2 is added and mixes with the natural brine forming a mixture such that the CO2/P is a first predetermined value. The mixture is held so that impurities in the natural brine precipitate as solids leaving a second brine substantially comprising the selected material. The second brine is heated. CO2 gas is injected into the second brine, mixing so that the CO2/P is a second predetermined value. The mixture is held so that the selected material precipitates out and are removed.