METHOD OF RECEIVING MONOHYDRATE OF LITHIUM HYDROXIDE

摘要

FIELD: metallurgy. ^ SUBSTANCE: method includes causticisation of lithium carbonate by slaked lime with receiving of lithium hydroxide solution and insoluble calcium carbonate. After separating of lithium hydroxide solution from calcium carbonate it is implemented evaporation of lithium hydroxide solution, crystallisation of rough monohydrate of lithium hydroxide from evaporated solution, separation of rough monohydrate of lithium hydroxide from growth solution. Additionally lithium hydroxide solution from the stage of causticisation is evaporated per 8590% volume. Growth solution after crystallisation of rough monohydrate of lithium hydroxide is evaporated and from it there is crystallised technical monohydrate of lithium hydroxide. Technical monohydrate of lithium hydroxide is separated from growth solution, which is evaporated in closed loop in common to growth solution from the stage of crystallisation of rough monohydrate of lithium hydroxide. ^ EFFECT: reduction of volume of rough monohydrate of lithium hydroxide, requiring recrystallisation, and reduction on this basis expenditures for recrystallisation. ^ 1 tbl, 1 ex