摘要
在25±2℃下研究了 D2EHPA—煤油从硫酸盐介质中革取分离钻(Ⅱ)、锰(Ⅱ)的工艺。考察了萃取剂浓度、平衡 pH 值,相比对萃取钻锰的影响,获得了较适宜的工艺条件,利用五级逆流萃取模拟试验将钻锰浓度比从1∶1.5提高到1000∶1。加入洗涤段后,可获得金属含量比为1000的纯钴、锰溶液。初步探索了用液膜萃取新技术从溶液中分别富集,分离钴(Ⅱ)、锰(Ⅱ)的方法,找出了体系 pH 值对液膜萃取的影响。提出了从 PTA 氧化母液中回收废催化剂、萃取分离钻、锰,再生制备醋酸钴、醋酸锰和其他含钴锰的精细化工产品的工艺。此方法可考虑用来处理含 Co、Mn 的废水。
In this paper,the most suitable technological conditions to separate manganese from cobalt in sulphate solution by di(2—ethylhexyl)phosphoric acid(D2EHPA)—diluted kerosene are studied at 25℃.The effect of D2EHPA concentration,the pH of the equilibrated aqueous phase and O/A ratio on mangnese and cobalt extraction are investigat- ed.Esperirnental results indicate that five counter—current extraction stages make concentra- tion ratio of cobalt to manganese rise from 1:1.5 to 1000:1.After adding a washing stage, we obtain the pure manganese sulphate solution only containing 1/1000 cobalt(Ⅱ).In ad- dtion,a study is made on the enrichment and separation of cobalt and manganase from an aqueous solution by means of liquid surfactant membranes.
出处
《水处理技术》
CAS
CSCD
北大核心
1993年第2期87-92,共6页
Technology of Water Treatment
关键词
P204
萃取
催化剂
废水处理
钴
锰
di (2—othylhexyl) phosphorice acid (D2EHPA)
solvent extraction
recovery or waste catalysts
water treatment
