Method for accelerating platinum dissolution

Abstract

The invention relates to the field of platinum purification, and particularly relates to a method for accelerating platinum dissolution. The method solves the problem of high cost caused by excessiveaddition amount of base metal in the existing platinum dissolution process. The method comprises the following steps that S1, platinum ingots and base metal are mixed together to be molten into moltengold; S2, the molten gold is slowly poured into a container downwards, and the falling molten gold is impacted horizontally through high-pressure water, so that the molten gold is broken into gold particles; and S3, the gold particles and aqua regia are added into a reaction kettle and are stirred and heated to a slightly boiling state, and stirring and dissolution are carried out in the slightlyboiling state; and the weight ratio of the platinum ingots to the base metal is (0.93-0.97) to (0.07-0.03). According to the method, the required amount of the base metal is greatly reduced while theplatinum dissolving speed can be guaranteed, and the effect of saving cost is achieved.

Description

technical field [0001] The application relates to the field of platinum purification, in particular to a method for accelerating the dissolution of platinum. Background technique [0002] Platinum (Pt) is a naturally occurring white precious metal with superior chemical stability. It can be used as jewelry decorations or handicrafts, as well as high-grade chemical vessels, platinum crucibles, electrodes or catalysts in chemical reactions. In addition, in the field of special materials, platinum can be used as an important raw material for the production of high-temperature thermocouples. Platinum 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. [0003] In the processing flow of platinum purification, the dissolution of platinum is a very important link in the platinum purification process. Solid platinum ingots are dissolved into the solution to become compound...

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Problems solved by technology

[0005] In view of the prior art mentioned above, the chemical properties of copper are more active than platinum, and aqua regia will react more easily with copper in the alloy, and copper ions will be continuously generated in the reaction system. The proportion of copper in the alloy is very high, and copper will consume a large part of the aqua regia. Water, the amount of aqua regia required to actually dissolve platinum has increased a lot, the cost has increased, and the cost of copper is also high, so the overall cost is very high

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