Novel process for preparing high-purity platinum

A new process, high-purity technology, applied in the field of chemical separation, can solve the problems of long production cycle, inconvenient operation, occupying space and space, and achieve the effect of improving the dissolution rate, reducing production cost and increasing the contact area.

Inactive Publication Date: 2018-10-16
南京东锐铂业有限公司 +1
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Problems solved by technology

The sodium bromate hydrolysis method and the oxidized carrier hydrolysis method have a large amount of solution and need to stand for a long time to settle, occupying space and space, and the producti

Method used

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Examples

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Example Embodiment

[0018] The present invention will be further described below in conjunction with specific embodiments.

[0019] 1. Grinding. Put the platinum-containing material into a ball mill to grind finely, keep the machine speed at 2000 revolutions per hour, stop the machine after 30-40 minutes, cool to room temperature, and turn it out to obtain a negative 200 mesh particle size waste.

[0020] 2. Acid soluble. According to the capacity of the reactor, weigh a proper amount of raw materials and add 3-4 mol / L hydrochloric acid to soak, heat to a temperature of 75°C to 85°C, and add 30% hydrogen peroxide solution dropwise until the dissolution is complete. Filter out the insoluble matter.

[0021] 3. Precipitation. Adding 1 to 1.5 times the weight of platinum of ammonium chloride for platinum precipitation, after precipitation is completed, standing and cooling to room temperature, ammonium chloroplatinate is filtered and washed.

[0022] 4. Alkali soluble. Under stirring, add solid sodium h...

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Abstract

The invention relates to a novel process for preparing high-purity platinum. The high-purity platinum is prepared with the novel method that dissolution by hydrochloric acid and hydrogen peroxide, andplatinum precipitation by ammonium chloride are combined with sodium hydroxide dissolution and hydrazine hydrate reduction. The dissolution method with hydrochloric acid and hydrogen peroxide is adopted, impurities are not brought in, nitrate removal is not needed, the process is simplified, energy consumption is lowered greatly, enterprise production cost is reduced, and environmental protectionis achieved. An alkali dissolution method is adopted for secondary dissolution, the reaction time is much shorter than the reaction time of traditional aqua regia dissolution, nitrate removal is notneeded, the process is simplified, energy consumption is lowered greatly, enterprise production cost is reduced, and environmental protection is achieved.

Description

technical field [0001] The invention relates to a chemical separation method, in particular to a new process for preparing high-purity platinum. Background technique [0002] There are many refining methods for platinum, which can be summarized as carbonyl platinum chloride method, molten salt electrolysis method, zone smelting method, ammonium chloride repeated precipitation method, sodium bromate hydrolysis method, oxidation carrier hydrolysis method, etc. Among them, the carbonyl chloride method and the molten salt electrolysis method are complicated in process and cumbersome in operation, which limits their large-scale production and application. The zone smelting method is mainly used to produce ultra-high purity platinum, and it is rarely used in large-scale industrial production. The sodium bromate hydrolysis method and the oxidized carrier hydrolysis method have a large amount of solution and need to stand for a long time to settle, occupying space and site, and the...

Claims

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Application Information

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IPC IPC(8): B22F9/24C22B11/00
CPCB22F9/24C22B11/04
Inventor 姚志刚王健李忠飞
Owner 南京东锐铂业有限公司
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