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Method for extracting platinum group metals from waste automotive three-way catalyst

A three-way catalyst, platinum group metal technology, applied in the direction of improving process efficiency, can solve problems such as complex process and environmental pollution, and achieve the effects of short process, low environmental pollution and low cost

Inactive Publication Date: 2011-07-27
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These existing methods have problems such as complex process and environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 302g of a waste automobile three-way catalyst, in which the grades of Pt, Pd, and Rh are 101.2g / t, 1362.2g / t, and 36.8g / t, respectively, and the platinum-group metals are obtained after using the existing technology to smelt and trap lead. Lead alloy 50g, including Pt 600g / t, Pd 8155g / t, Rh 220g / t. After the material was distilled for 60 minutes at a temperature of 900°C and a vacuum of 1Pa, the weight of the residue was 12g, which contained 2499g / t of Pt, 33977g / t of Pd, and 916g / t of Rh; the grade of platinum group metals in the condensate was <1g / t .

Embodiment 2

[0012] 352g of a certain waste automobile three-way catalyst, in which the grades of Pt, Pd, and Rh are 76.2g / t, 1905.7g / t, and 22.91g / t respectively, and the platinum group metals are obtained after using the existing technology to smelt and capture lead. 100g of lead alloy, containing Pt 266g / t, Pd 6663g / t, Rh 80g / t. After the material was distilled for 90 minutes at a temperature of 1200°C and a vacuum of 600Pa, the weight of the residue was 18g, which contained 1476g / t of Pt, 37014g / t of Pd, and 444g / t of Rh; the grade of platinum group metals in the condensate was <1g / t .

Embodiment 3

[0014] A certain waste automobile three-way catalyst 390g, wherein the grades of Pt, Pd, and Rh are 118.0g / t, 1724.2g / t and 35.3g / t respectively, which is obtained by using the prior art to smelt and capture lead containing platinum group metals Lead alloy 80g, including Pt 422g / t, Pd 6200g / t, Rh 126g / t. After the material was distilled for 80 minutes at a temperature of 1050°C and a vacuum of 60Pa, the weight of the residue was 15g, which contained 2250g / t of Pt, 33065g / t of Pd, and 671.5g / t of Rh; the grade of platinum group metals in the condensate was <1.5g / t.

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Abstract

The invention relates to a method for extracting platinum group metals from a waste automotive three-way catalyst. The method is characterized in that the platinum group metals in the waste automotive three-way catalyst are captured through lead smelting to obtain a material with Pt, Pd and Rh, and the material is heated to a certain temperature under the vacuum condition to volatilize the lead of the material and achieve the aim of highly enriching the platinum group metals of the material. By adopting the method, the extraction process of the platinum group metals in the waste automotive three-way catalyst is short, the efficiency is high and the environmental pollution of the process is lower.

Description

Technical field: [0001] The invention relates to a method for recovering platinum group metals from waste automobile three-way catalysts, in particular to a method for capturing platinum group metals in waste automobile three-way catalysts with lead, and obtaining materials after platinum group metals are captured. The method The process for extracting platinum group metals from waste automobile three-way catalysts is short and efficient, and the process has less environmental pollution. Background technique: [0002] Platinum group metals play an irreplaceable role in the fields of national defense, aerospace, information energy, petrochemicals, and environmental protection. However, due to the scarcity of platinum group metal mineral resources, it is extremely important to strengthen the recovery and utilization of platinum group metal secondary resources. The exhausted automotive three-way catalyst is the largest and most important secondary resource of platinum group me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00
CPCY02P10/20
Inventor 吴国元陈景
Owner YUNNAN UNIV
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