摘要
P538 P204及其混合物从盐酸溶液中萃取Fe(Ⅲ)的平衡可分别表达为: P538: Fe^(3+)+4/j(H_2A)j(o) K′_A Fe(HA)_3·H_2A(o)+3H^+ P204: Fe^(3+)+2H_2B_2(o) K′_B FeB_3·HB(o)+3H^+ P538+P204:Fe^(3+)+2/j(H_2A)j(o)+H_2B_2(o) K′_(AB) Fe(HA)_2B·HB(o)+3H^+其表观萃取平衡常数分别为 lgK_A=4.46±0.09 lgK_B=3.44±0.08 lgK_(AB)=5.47±0.10 等摩尔的P538,P204混合物有最大的协同萃取系数。
The mechanisms of extraction of Fe(Ⅲ) from hydrochloric acid solution with P538,P204 and their mixture were studied. The extraction equations under the experimental condi-tions could be as follows: p538: Fe^(+3)+4/j(H_2A)_(j(o)) K'_A Fe(HA)_3·H_2A_((o))+3H^+ p204: Fe^(3+)+2H_2B_(2(o)) K'_B FeB_3·HB_((o))+3H^+ p538+p204: Fe^(3+)+2/j(H_2A)_(j(o))+H_2B_(2(o)) K'_(AB) Fe(HA)_2B·HB_((o))+3H^+with the apparent extraction constants1gK_A = 4.46±0.09, 1gK_B = 3.44±0.08, 1gK_(AB) = 5.47±0.10respectively. The equimolar mixture of P538 and P204 showed a maximum synergistic effect on theextraction.
出处
《应用化学》
CAS
CSCD
北大核心
1991年第4期43-47,共5页
Chinese Journal of Applied Chemistry
基金
山东省自然科学基金
