摘要
用Na2S.9H2O和1-溴丁烷合成了二丁基硫醚(简写为M)。以二丁基硫醚为萃取剂进行了钯、铂萃取分离的研究,并采用正交实验,得出了钯、铂分离的最佳条件为cM=0.344mo.lL-1,O/A=1∶1,t=6min,cH+=2mol·L-1。测得二丁基硫醚萃取钯的容量大于17g.L-1。研究了二丁基硫醚萃钯的机理,测得二丁基硫醚萃取钯的反应方程式为PdCl42-+2M→PdCl2.2M+2Cl-。用9mol·L-1的氨水可以有效反萃钯,反萃率达到96.3%。以12g.L-1的NaCl溶液对铂的反萃率为88.9%。用含[PdCl4]2-、[PtCl6]2-、Cu2+、Fe2+和Ni2+离子的混合液验证了钯、铂分离的适宜条件。
Dibutyl sulfide （abbreviated as M） was synthesized with Na2S·9H2O and n-butyl bromide. The performance for extraction and separation of palladium and platinum was studied and the optimum conditions for separation of Pd and Pt were 0.344 mol·L^-1 for dibutyl sulfide, 1：1 for Organic/Aqueous phase ratio （O/A）, 6 min extraction and 2 mol·L^-1 H^＋ in aqueous phase as obtained by rhombic experiments. The capacity of palladium extraction was determined with dibutyl sulfide to be exceeded 17 g·L^-1. The possible mechanism of palladium extraction with dibutyl sulfide was also studied. The extraction equation was ascertained and signified as PdCl4^2- ＋ 2M → PdCl2·2M ＋ 2Cl^-. Palladium could be stripped effectively by ammonia of 9 mol·L^-1, and the palladium stripped was 96.3%. Platinum could be stripped by sodium chloride, the percentage stripping of platinum was 88.9% when concentration of sodium chloride was 12 g·L^-1. The optimum conditions of separating palladium and platinum were verified with mixed solution containing [PdCl4]^2-, [PtCl6]^2-, Cu^2＋, Fe^2＋ and Ni^2＋.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2008年第4期520-526,共7页
Chinese Journal of Inorganic Chemistry
关键词
二丁基硫醚
萃取
钯
铂
分离
dibutyl sulfide
extraction
palladium
platinum
separation
