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A kind of technology of combined extraction of platinum and ruthenium

A combined extraction and process technology, applied in the field of combined extraction of platinum and ruthenium, can solve the problems of energy, reagents and large pollution, long process time, human hazards, etc., and achieve simple operation process and production equipment, simple preparation method and high industrial value Effect

Active Publication Date: 2020-05-08
陈永福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the solvent extraction method, the technical difficulty is high, the process time is long, and there are many factors limiting the separation and phase separation. If you want to improve the process level, you need to develop a large amount of organic solvents, which wastes manpower and material resources, and the organic solvents are toxic. The working conditions are poor, There are many unfavorable factors such as high intensity; it has great pollution to water resources and the environment, and it is difficult to control.
The solvent itself will be poisoned and ineffective due to the different components of the extraction solution. Secondly, it will cause different degrees of harm to the human body. The extraction of ruthenium usually adopts the method of distillation, which requires a lot of energy, reagents and pollution. There is no direct extraction and extraction at home and abroad. Process for separating ruthenium

Method used

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Examples

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Effect test

preparation example Construction

[0065] The preparation method of the platinum ruthenium alkaline solution of the present embodiment comprises the steps:

[0066] (a) Take the cooked coke gem raw material, pulverize it into coke coke powder with a fineness of 200 mesh for subsequent use; mix and stir concentrated sulfuric acid with a mass fraction of 98% and water at a mass ratio of 0.9:1 to obtain a sulfuric acid solution, and take the molar Concentration is the hydrochloric acid solution of 1mol / L standby;

[0067] Acidify the cooked coke gemstone powder and hydrochloric acid solution at a mass ratio of 1:2, filter the waste liquid after acidification, and obtain the reaction material; mix the reaction material with sodium chloride, sulfuric acid solution and hydrochloric acid solution at a ratio of 4.5:1:4.5:31.5 The mass ratio is mixed to obtain a mixed material;

[0068] Heat the mixed material to 60°C for 12 minutes under the light of the firelight, and filter out the coarse residue after cooling for 5...

Embodiment 1

[0073] A kind of combined extraction process of platinum and ruthenium of the present embodiment comprises the following steps:

[0074] (1) transfer the platinum ruthenium alkaline solution into the reaction vessel and let stand for 16 hours;

[0075] (2) Slowly drop in the reaction vessel with dilute sulfuric acid, the concentration of dilute sulfuric acid is 1mol / L, produces white flocculent precipitate H 2 [Pt(OH) 6 ] and the gas RuO 4 , stop dripping until the white flocculent precipitate is full of the whole solution, the volume ratio of the volume of dilute sulfuric acid to the platinum ruthenium alkaline solution is 0.3:1;

[0076] (3) the gas is recovered with dilute hydrochloric acid at 0° C., the concentration of dilute hydrochloric acid is 0.5 mol / L, and the volume ratio of the volume of dilute hydrochloric acid to the platinum-ruthenium alkaline solution is 2.5:1 until the color of the solution is golden yellow, The chloride salt of ruthenium is obtained, end. ...

Embodiment 2

[0078] A kind of combined extraction process of platinum and ruthenium of the present embodiment comprises the following steps:

[0079] (1) The platinum ruthenium alkaline solution is transferred to the reaction vessel and left to stand for 24 hours;

[0080] (2) Slowly drop in the reaction vessel with dilute sulfuric acid, the concentration of dilute sulfuric acid is 3mol / L, produces white flocculent precipitate H 2 [Pt(OH) 6 ] and the gas RuO 4 , stop dripping until the white flocculent precipitate is full of the whole solution, the volume ratio of the volume of dilute sulfuric acid to the platinum ruthenium alkaline solution is 0.5:1;

[0081] (3) The gas is recovered with dilute hydrochloric acid at 10°C, the concentration of dilute hydrochloric acid is 1mol / L, and the volume ratio of the volume of dilute hydrochloric acid to the platinum-ruthenium alkaline solution is 3:1 until the solution color is golden yellow, obtaining Chloride salt of ruthenium, end.

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Abstract

The invention discloses a process for jointly extracting platinum and ruthenium. The process comprises the following steps: (1) transferring a platinum-ruthenium alkaline solution into a reaction vessel for standing; (2) slowly dropwise adding dilute sulfuric acid into the reaction vessel to produce white flocculent precipitate and gas, and stopping the dropwise addition until the whole solution is fully filled with white flocculent precipitate; (3) recovering the gas with cold dilute hydrochloric acid, and stopping until the color is golden yellow. The method can be operated at the room temperature without needing the conditions of heating, pressurizing, using an extraction agent and the like; the process has the advantages of being simple in preparation method, low in production cost, rapid in reaction speed, high in separating efficiency, and the like.

Description

technical field [0001] The invention belongs to the technical field of precious metal smelting, and in particular relates to a process for jointly extracting platinum and ruthenium. Background technique [0002] Platinum group metals are precious metals, which are metals with a small amount of resources among all the metals stored in the earth's crust. The incomparable and excellent comprehensive physical and chemical properties of metals, the bright and bright colors that remain unchanged all year round, the long-lasting and stable service life and long-term storage without depreciation, and the unique biological and catalytic activities have become a class of irreplaceable and widely used materials. Special metals used in various fields of human life. [0003] The output from natural minerals of the platinum ore type containing high concentrations of platinum group elements is very small, and the raw materials for industrial production of platinum group elements are mostl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/44C22B11/00
CPCC22B3/44C22B11/04Y02P10/20
Inventor 陈永福
Owner 陈永福