Lithium hydroxide monohydrate production process, including the following steps: (1) lithium sulfate solution made from spodumene by roasting, acidizing, pulping, leaching and initial concentration; (2) Adding sodium hydroxide to lithium sulfate solution to obtain a mixture of sodium sulfate and lithium hydroxide solution; Li2SO4+2NaOH →2LiOH+Na2S O4 (3) the mixed solution of sodium sulfate and lithium hydroxide is cooled and frozen, the solution temperature is reduced to 5~-10℃, and sodium sulfate is separated after crystallization; (4) The clear liquid separated by freezing, heating, evaporation and concentration; (5), crystallization and centrifugal separation, lithium hydroxide crude product; (6), in the crude product lithium hydroxide solution Barium hydroxide is added to the solution to form insoluble barium sulfate, which is filtered to remove sediment and debris. The filtered solution is condensed, crystallized and separated by evaporation to obtain wet monohydrate lithium hydroxide :Ba(0H)2+S042→BaS04+20H (7) Dry to lithium hydroxide monohydrate.   Lithium hydroxide monohydrate (Li0HH20)…

Battery grade lithium oxychloride monohydrate is an important battery material… It is a compound composed of lithium ions and chloride ions, with the formula LiOH. It is a white solid with good solubility and thermal stability, and is one of the important raw materials for the preparation of lithium-ion batteries. There are many methods for the preparation of battery grade lithium hydroxide monohydrate, of which the most common method is prepared by the reaction of lithium carbonate and sodium hydroxide. Lithium carbonate and sodium hydroxide react in water to form lithium hydroxide monohydrate and sodium carbonate. The reaction equation is as follows: Li2CO3 + NaOH →LiOH·H2O +Na2CO3 The preparation process needs to control the reaction temperature and reaction time in order to obtain high purity lithium hydroxide monohydrate. The prepared lithium hydroxide monohydrate needs to be dried and crushed to obtain a fine powder of battery grade lithium hydroxide monohydrate.…