| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a manganese sulfate in which a calcium concentration is decreased by purifying rough manganese sulfate that contains calcium.SOLUTION: A method of manufacturing a manganese sulfate includes: a process 1 that prepares an aqueous solution of roughness manganese sulfate that contains calcium and in which a manganese concentration in a liquid is below a saturation concentration; and a process 2 in which the aqueous solution is then added with sulfuric acid, further a liquid volume is adjusted, thereby calcium sulfate is made to be below a saturation concentration and a sulfuric acid concentration is made to be at least 450 g/L, and the manganese sulfate is deposited. |
