杂质对磷酸萃取过程的影响  

Effect of impurities on extraction of phosphoric acid

作　　者：龚海燕[1] 李军[1] 陈亮[1] 翁贤芬[2] 

机构地区：[1]四川大学化工学院,四川成都610065 [2]四川理工学院,四川自贡646300

出　　处：《磷肥与复肥》2005年第5期11-13,共3页Phosphate & Compound Fertilizer

摘　　要：研究萃取相比与磷酸萃取率和杂质分离系数之间的关系,考察硫酸和铁2种杂质对磷酸萃取率的影响。实验结果表明:随着相比提高,磷酸萃取率上升,且各杂质分离系数提高;硫酸的存在有利于磷酸萃取,且存在一个最佳含量,使磷酸对硫酸分离系数最大;而铁离子的存在则不利于磷酸萃取。Some relationships are studied among the phase ratio, extraction efficiency and separation coefficients, and the influences of 2 impurities SO4^2- and Fe^3＋ on extraction efficiency of phosphoric acid are discussed. The experimental results show that the extraction efficiency of phosphoric acid and the separation coefficients of impurities rise with the increasing phase ratio; the impurity H2SO4 is positive to the extraction of phosphoric acid under an optimum amount of H2SO4, with the maximum separation coefficient between the phosphoric acid and sulfuric acid; meanwhile the impurity Fe^3＋ is negative.

关 键 词：磷酸 溶剂萃取 杂质分离系数 

分 类 号：TQ126.35[化学工程—无机化工]