Method for identifying extent of replacement purification reaction of platinum group metals

Abstract

The invention relates to a method for identifying the extents of replacement purification reactions of platinum group metals. The method is characterized in that the identifying process is as follows: replacing noble metal liquid containing gold extracting organic phase with copper powder to obtain different extents of standard solution, taking the colors which are obtained after dropwise adding chemical reagents tin dichloride and ethyl acetate to the different extents of standard solution as the standards to prepare colorimetric cards with the corresponding colors; and comparing the colors which are obtained after dropwise adding chemical reagents tin dichloride and ethyl acetate to the noble metal liquid sample containing gold extracting organic phase, which is being replaced with copper powder, with the colorimetric cards, and identifying the extents of reaction corresponding to the colorimetric cards with colors the same as the obtained colors as the extents of the replacement reactions which are being carried out by using copper powder. The method has the beneficial effects of realizing rapid and effective judgment of the end point of the process of replacing the noble metalliquid after gold extraction with copper powder to separate platinum and palladium from rhodium and iridium, saving numerous reagents used for judging the end point of the process, reducing the replacement period, effectively improving the replacement effect and greatly improving the once qualified rate of the platinum products.

Description

technical field [0001] A method for identifying the degree of substitution and purification reaction of platinum group metals, involving the end point of the substitution reaction in the process of substitution and purification of platinum group metals, especially the noble metal liquid containing the organic phase of gold extraction is replaced by copper powder to separate platinum, palladium, rhodium and iridium A method for the identification of the extent of the displacement process. Background technique [0002] In the replacement process of separating platinum, palladium, rhodium and iridium from the precious metal liquid containing the organic phase of gold extraction with copper powder, it is often difficult to grasp the end point of a replacement, requiring experienced operators to observe and compare repeatedly, and at the same time use a large number of The chemical reagents prepared and combined with the instrument measurement are repeatedly judged. The end point...

AI Technical Summary

Problems solved by technology

[0002] In the replacement process of separating platinum, palladium, rhodium and iridium from the precious metal liquid containing the organic phase of gold extraction with copper powder, it is often difficult to grasp the end point of a replacement, requiring experienced operators to observe and compare repeatedly, and at the same time use a large number of The chemical reagents prepared and combined with the instrument measurement are repeatedly judged. The end point judgment process consumes a lot of time, manpower, energy, and reagents, and there will be great differences due to different operators, resulting in long operation cycles and low replacement efficiency. Greatly affected the qualified rate of platinum group metal products