论文部分内容阅读
文章报道了25℃时,用叔胺和DEHPA分别萃取钼和钨,及用DEHPA分离硫酸溶液中钼-钨的平衡数据。有机相的体积比为10％萃取剂-2％乙基己醇-煤油,其中萃取剂溶解于煤油中,乙基己醇作相调节剂。萃取数据是在钼的初始浓度为1～10g/l和钨的初始浓度5～10g/l,改变pH值、相比(O/A)和钨钼比的条件下得到的。叔胺在pH°=1～2时萃取钼和在pH°=3时萃取钨都有很高的萃取率,而DEHPA只在pH°=3时选择性地萃取钼。在pH°=3和O/A=1/2条件下,钨钼有最佳的分离效果。
The article reports the extraction of molybdenum and tungsten with tertiary amines and DEHPA at 25 ° C and the equilibrium data of molybdenum-tungsten in sulfuric acid solutions by DEHPA. The volume ratio of the organic phase is 10% of the extractant - 2% of ethylhexanol - kerosene, wherein the extractant is dissolved in kerosene and ethylhexanol is used as a phase modifier. The extraction data is obtained at an initial concentration of 1 to 10 g / l of molybdenum and an initial concentration of 5 to 10 g / l of tungsten, changing the pH, the ratio of (O / A) and the ratio of tungsten to molybdenum. Tertiary amines have very high extraction rates for molybdenum extraction at pH ° = 1-2 and tungsten extraction at pH ° = 3 whereas DEHPA only selectively extracts molybdenum at pH ° = 3. Under the conditions of pH ° = 3 and O / A = 1/2, tungsten and molybdenum have the best separation effect.