Comprehensive Utilization of Manganese Sulphate Containing Waste water from Hydroquinone Production
对苯二酚生产中含硫酸锰废水的综合利用

Waste water containing manganese sulphate was firstly neutralized to remove Fe and then sulphurated to remove Co and Ni from the water so as to obtain electrolysis liquid up to standard. After addition of Se, the liquid underwent electrolysis for 24 hrs and inactivation to get metallic manganese. Manganese Carbonate was prepared from anode waste water resulting from the electrolysis of mangar se sulphate and then ammonium sulphate was recovered from the waste water of manganese carbonate. The purity of the manganese produced herefrom can reach 99.8%. The process proved to be simple and feasible and possess tangible economical and environmental benefit.