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为了研究2-(叔-十二烷基硫代硫呲啶刘各种金属的萃取性能,用2-氯吡啶与叔-十二烷基硫醇合成了各种萃取剂。研究发现,在氯化物介质中,该萃耽剂对于Pd(Ⅱ)、Hg(Ⅱ)的萃取选择性要优子Pt(Ⅱ)、Pt(Ⅳ)和贱金属。在硝酸介质中(0.01～5mol HNO_3)Ag(Ⅰ)几乎完全被萃取。在浓度为0.01～2mol/1和0.01～0.5mol/1的盐酸介质中,Pd(Ⅱ)和Hg(Ⅱ)可分别完全被萃取。Pd(Ⅱ)从盐酸介质中被萃取的速率要比使用二烷基硫醚和三异丁基膦硫醚萃取剂快得多。发现硫脲和盐酸混合物的水溶液是Pd(Ⅱ)的有效反萃取剂,其反萃效果取决于硫脲和盐酸的浓度.
In order to study the extraction properties of 2- (tert-dodecylthiothioparbolide), various extraction agents were synthesized from 2-chloropyridine and t-dodecylmercaptan, In the medium, the extractant has excellent selectivity to Pt (Ⅱ), Pt (Ⅳ) and base metal for the extraction of Pd (Ⅱ) and Hg (Ⅱ) Ⅰ) was almost completely extracted.Pd (Ⅱ) and Hg (Ⅱ) could be completely extracted respectively in hydrochloric acid with concentration of 0.01 ~ 2mol / 1 and 0.01 ~ 0.5mol / Was extracted at a much faster rate than using dialkyl sulfides and triisobutyl phosphine sulfide extractants.It was found that the aqueous solution of the mixture of thiourea and hydrochloric acid is an effective stripping agent for Pd (II) and the stripping effect depends on The concentration of thiourea and hydrochloric acid.