METHOD OF PRODUCING PRILLED SODIUM HYDROXIDE FROM MERCURY CELL SODIUM HYDROXIDE

摘要

Disclosed is a method of producing fused caustic soda prills from mercury cell caustic soda. Mercury cell caustic soda generally contains more than about 0.10 parts per million of mercury on an anhydrous basis and less than 0.005 weight percent of sodium chloride on an anhydrous basis. According to the disclosed process, sufficient mercury is removed from the mercury cell caustic soda to provide a mercury content of less than 0.10 parts per million of mercury, anhydrous basis, and sufficient sodium chloride is added to the caustic soda to provide a sodium chloride content of greater than 0.05 weight percent, anhydrous basis.