申请人:Allied Corporation
公开号:US04578250A1
公开(公告)日:1986-03-25
The present invention is directed to a method of separating and purifying palladium which is present in a solution with at least one other platinum group metal by adjusting the pH of the solution to from about 0 to 5, contacting the acidified solution with an ortho alkoxy substituted phenyl oxime of the formula: ##STR1## or a composition comprising of one or more of said compounds dissolved in an organic solvent, wherein: n is an integer of from 1 to 4; R.sub.1 is alkyl, cycloalkyl, or aralkyl; and R.sub.2 is nitro, halogen, hydrogen or substituted ro unsubstituted alkyl, alkoxy, aryloxy, cycloalkyl, aryl, aralkyl or alkaryl, wherein permissible substituents are those which are inert to process conditions; and R.sub.3 is alkyl, aryl, alkaryl, cycloalkyl or aralkyl either unsubstituted or substituted with one or more of the above referenced permissible substituents, using solvent extractions techniques, separating the aqueous phase from the organic phase containing substantially all of the palladium in association with the oxime compound, and stripping the palladium from the association with the oxime compounds in the organic phase by extraction with an aqueous ammonia solution.
本发明涉及一种将存在于至少一种其他铂族金属溶液中的钯分离和纯化的方法,该方法通过将溶液的pH调整到约0至5,并将酸化的溶液与下列式的酚肟类化合物之一接触:##STR1## 或溶解于有机溶剂中的一种或多种该化合物组成的混合物,其中:n为1至4的整数;R.sub.1为烷基、环烷基或芳基烷基;R.sub.2为硝基、卤素、氢或取代或未取代的烷基、烷氧基、芳氧基、环烷基、芳基、芳基烷基或烷基芳基,其中可允许的取代基是对工艺条件惰性的;R.sub.3为未取代或取代的烷基、芳基、烷基芳基、环烷基或芳基烷基,其中取代基可以是上述可允许的取代基之一或多个,使用溶剂萃取技术将水相与含有与酚肟类化合物相关联的几乎所有钯的有机相分离,并通过用水溶氨溶液萃取从有机相中去除与酚肟化合物相关联的钯。