Novel process for purifying high-purity platinum

A new process, high-purity technology, applied in the field of metallurgical process, can solve the problem of low purity, and achieve the effect of improving the purity, saving costs and simplifying the process

Pending Publication Date: 2022-04-12
深圳市博远贵金属科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a new high-purity platinum purification process to solve the problems of improving platinum refining efficiency and low purity

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  • Novel process for purifying high-purity platinum

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] The technical route of the present invention is: dissolving platinum containing more impurities with aqua regia to obtain platinum solution; adding ammonium chloride to obtain ammonium chloroplatinate precipitation; adding ammonium oxalate to obtain ammonium chloroplatinite solution; acidity, add hydrogen peroxide to obtain ammonium chloroplatinate precipitation; repeat the dissolution and precipitation for many times to obtain ammonium chloroplatinate precipitation; calcined ammonium chloroplatinate precipitation to obtain metal platinum.

[0024] With reference to the acco...

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Abstract

The invention provides a novel process for purifying high-purity platinum. The novel process comprises the following steps: 1, dissolving metal platinum to prepare a solution; 2, preparing the platinum solution into a precipitate: adding solid ammonium chloride to obtain an ammonium chloroplatinate precipitate; 3, dissolving the precipitate: adding water into the ammonium chloroplatinate precipitate for slurrying, and adding ammonium oxalate to obtain filtrate; 4, re-precipitating: adjusting the acidity of the filtrate with hydrochloric acid, and adding hydrogen peroxide to obtain ammonium chloroplatinate precipitate; 5, calcining: calcining the ammonium chloroplatinate to obtain metal platinum; and 6, ingot casting: heating and melting the metal platinum, and pouring into a cooling tank for ingot casting. According to the method, potassium sulfite or sodium sulfite in the original process is replaced with ammonium oxalate and ammonium chloride, ammonium is separated from metal platinum in the form of ammonia gas after calcination, the purity is improved, the process is simplified, time and cost are saved, and efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of metallurgical technology, in particular to a new process for purifying high-purity platinum. Background technique [0002] Platinum is a naturally occurring white precious metal with superior chemical properties and stability. It can be used as jewelry decorations or handicrafts, as well as advanced chemical vessels, platinum crucibles, electrodes or catalysts in chemical reactions. In addition, it can be used in special In the field of materials, platinum can be used as an important raw material for the production of high-temperature thermocouples. In the previous platinum purification and refining process, the process mainly used potassium oxalate as a reducing agent to redissolve the ammonium chloroplatinate precipitation to generate water-soluble potassium chloroplatinite, and the filtrate was oxidized to generate slightly water-soluble chloroplatinum Potassium acid precipitation, this double salt ...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B11/02C22B3/44C22B5/02
CPCY02P10/20
Inventor 卢传敏邓文连唐博
Owner 深圳市博远贵金属科技有限公司
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