Production process of lithium hydroxide

Production process of lithium hydroxide

  • CN 104,724,729 A
  • Filed: 12/23/2013
  • Published: 06/24/2015
  • Est. Priority Date: 12/23/2013
  • Status: Active Application
First Claim
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1. a production technique for lithium hydroxide, is characterized in that, with the crystalline mother solution containing high concentration sodium sulfate and lithium hydroxide after crystallization sal glauberi in Lithium Sulphate method production lithium hydroxide process for raw material, adopts following steps to produce lithium hydroxide:

  • A, sodium sulfate are separated with lithium hydroxideCrystalline mother solution is imported nanofiltration membrane separation system, trapped fluid is concentrated metabisulfite solution, and permeate is lithium hydroxide solution;

    B, sulfate crystalSteps A gained metabisulfite solution is cooled to-10-5 DEG C, centrifugation, dry, obtain sal glauberi crystallization;

    Or after concentrated, cool to-10-5 DEG C, centrifugation, dry, obtain sal glauberi crystallization;

    C, Lithium Hydroxide Monohydrate crystallizationSteps A gained lithium hydroxide solution is concentrated through evaporator, then enter crystallizer continue concentrated after, through cooling, crystallization, centrifugation, drying, obtain Lithium Hydroxide Monohydrate crystallization.

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