对苯二酚生产中含硫酸锰废水的综合利用

根据硫酸锰废水的特性,采用中和除铁和硫化除钴、镍等方法先使废水净化,得到合格电解液.其后对该电解液通电并加入硒电解24小时,再经钝化等处理制得金属锰.利用电解硫酸锰后的阳极废水制取碳酸锰,并从碳酸锰废水中回收硫酸铵.本工艺简单可行,产品金属锰纯度达99.8％以上,经济和环境效益显著.

Comprehensive Utilization of Manganese Sulphate Containing Waste water from Hydroquinone Production

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.