A kind of platinum wet purification method

Abstract

A platinum wet purification method adopts the technical scheme that an aqua regia solution is twice added to enable a platinum alloy material to be completely dissolved, and a 20 percent sodium hydroxide solution is added to cooperate with reduction. Through optimal solution heating curves, reasonable solution ratio and improvement on both the concentration and the purity of an oxidant and a reducing agent, the purification process is optimized; the conventional purification period (10-12 days) is shorted by 7-8 days; the purification consumption is reduced by 15-20 percent; the energy consumption is reduced by 20-30 percent; the work environment is remarkably improved; and the purified platinum material is high in purity, so that the service life of a platinum product made of the purified platinum material is far longer than that of a platinum product processed by a traditional purification process.

Description

technical field [0001] The invention relates to the field of platinum processing and production, in particular to a platinum wet purification method. Background technique [0002] Purification is an important process in platinum processing, and the purity of platinum has a direct impact on the quality and service life of processed products. The traditional wet purification process has long purification cycle, high energy consumption, poor working environment, and high purification consumption. At present, platinum purification methods include dissolving precious metal method, full melting method, dry purification, wet purification, etc., but their The highest purity of recovered platinum is only 99%. Recycling of Platinum in Glass Fiber Industry by Dissolving Precious Metals Kunming Institute of Precious Metals proposes that Pt, Rh and Au alloy wastes should be decomposed with aqua regia, nitrate-removed to sodium salt, hydrogen peroxide will be reduced to separate gold, io...

AI Technical Summary

Problems solved by technology

However, the recovery rate is low. In view of the above-mentioned shortcomings of platinum purification, the purification of platinum has been optimized to overcome the shortcomings of low degree of "poisoning" and relatively low purity of the purified product.