METHOD OF PURIFYING BRINE FOR ELECTROLYSIS

摘要

A streamlined method of purifying brine for electrolysis. There is provided a method of purifying brine for electrolysis, comprising dissolving raw salt in water, adding a flocculating agent to the obtained crude brine, filtering the resultant crude brine and carrying our chelating resin treatment so that divalent metal ions are removed from the crude brine, wherein after the addition of the flocculating agent and before the filtration, an alkali agent is added to the crude brine so that its pH value is adjusted to fall within the range of 7.5 to 9.5 and thereafter the removal of divalent metal ions is carried out without changing of the pH value of the crude brine.