Process for reducing fouling in evaporators in lithium hydroxide recovery
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United States of America Patent
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Mar 30, 2021
Grant Date -
Feb 7, 2019
app pub date -
Jul 27, 2018
filing date -
Aug 3, 2017
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Abstract
A method of concentrating and/or producing lithium hydroxide in an evaporator entails feeding a stream comprising lithium, hydroxide and carbonate to the evaporator. In the evaporator, the feed is concentrated to form lithium hydroxide and lithium carbonate crystals. Further, the method entails reducing the tendency of lithium carbonate to scale the evaporator by increasing the concentration of lithium carbonate crystals in the evaporator by: (1) clarifying at least a portion of the concentrate in the evaporator to form a clarified solution; and (2) discharging the clarified solution as a clarified solution stream from the evaporator.
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