摘要
目前,在氯酸钠生产中常用化学沉淀法处理硫酸根,但是会产生大量含铬污泥,污染环境。提出利用离子交换树脂和纳滤膜装置综合处理结晶母液的方法,既能回收重铬酸钠又能脱除硫酸根。实验结果表明,重铬酸钠的回收率可达98%,结晶母液处理后硫酸钠质量浓度低于3 g/L,达到母液循环利用的要求。
Recently,chemical precipitation is used for treating sulfate radicals in the sodium chlorate production,butproduces a considerable amount of sludge containing Cr, causing pollution to the environment.The use of ion exchange resin and nanofihration membrane device integrated treatment of sodium chlorate industry crystallization mother liquor was presented.This method not only could recover sodium dichromate but also could remove sulfate radicals.Results showed that the recovery rate of sodium dichromate could reach 98%, and the content of sodium sulfate in the crystallization mother liquor was less than 3 g/L after treatment ,reaching the recycling requirements.
出处
《无机盐工业》
CAS
北大核心
2012年第10期37-38,共2页
Inorganic Chemicals Industry
关键词
离子交换树脂
纳滤膜
氯酸钠
硫酸钠
ion exchange resin
nanofiltration membrane
sodium chlorate
sodium sulfate
