MINERALIZATION METHOD OF CALCIUM CHLORIDE-TYPE FROM LITHIUM-CONTAINING SALT LAKE BRINE BY EVAPORATION AND BRINE MIXING
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United States of America Patent
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Issued Date -
Aug 8, 2024
app pub date -
Aug 26, 2022
filing date -
Feb 28, 2022
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Abstract
The invention discloses a mineralization method of a calcium chloride-type from lithium-containing salt lake brine by evaporation and brine mixing, comprising the following steps of: (1) naturally evaporating the calcium chloride-type from lithium-containing salt lake brine to precipitate sodium salt and potassium-containing mixed salt; and (2) when calcium in the brine is saturated, adding saturated solution of magnesium chloride in a certain proportion for brine mixing operation, and then naturally evaporating to precipitate carnallite, wherein a lithium-containing old brine with low potassium and sodium contents is obtained when magnesium in the brine is saturated. The method has the characteristics of simple process, simple and convenient operation, high potassium yield and easy extraction of lithium from lithium-containing brine, and has practical significance for the development and utilization of potassium and lithium resources in calcium chloride salt lakes.
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