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Method and equipment for leaching platinum-containing waste catalyst through mechanical activation

A mechanical activation, platinum catalyst technology, applied in the field of hydrometallurgy, can solve the problem of difficult separation of platinum and matrix, and achieve the effect of improving leaching thermodynamics and kinetic conditions, reducing equipment requirements, and reducing acid consumption

Inactive Publication Date: 2011-11-23
上海派特贵金属环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional acid or alkali dissolution (melting) is used for the dissolution of the matrix. In order to increase the leaching rate of aluminum and reduce the slag rate, the leaching is usually enhanced by high acid, high alkali, high pressure, high temperature or other measures. Despite this, it is still difficult to achieve efficient separation of platinum from the matrix

Method used

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  • Method and equipment for leaching platinum-containing waste catalyst through mechanical activation
  • Method and equipment for leaching platinum-containing waste catalyst through mechanical activation
  • Method and equipment for leaching platinum-containing waste catalyst through mechanical activation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A certain spherical (particle size 1-2 mm) platinum-containing spent catalyst, containing 0.19% platinum. Firstly, it is fired at 550°C for 2 hours in an air atmosphere with a natural particle size. Weigh 100 g of the platinum-containing waste catalyst pretreated by roasting, put it in the activation leaching equipment with 500 mL of sulfuric acid (50% mass concentration), and add zirconia balls with a ratio of Φ10:Φ6:Φ4 =3:4:4 1300g, the filling rate is 40%, set the speed at 6 r / min, start heating, leaching at 100°C for 4 h and then filtering. After the slag is dried, platinum is recovered from the filter residue, and aluminum sulfate is recovered from the filtrate. After testing, the platinum content is 1.91%, enriched by 10.05 times, and the leaching rate of alumina is 95.60%.

Embodiment 2

[0034]A certain spherical (particle size 1-2 mm) platinum-containing spent catalyst, containing 0.19% platinum. Firstly, it is calcined at 600°C for 1 hour under air atmosphere and natural particle size. Weigh 100 g of the platinum-containing waste catalyst pretreated by roasting, put it in the activation leaching equipment with 500 mL of sulfuric acid (50% mass concentration), and add zirconia balls with a ratio of Φ10:Φ6:Φ4 =3:4:4 1300g, the filling rate is 50%, the speed is set at 6 r / min, heating is started, leaching at 100°C for 4 h and then filtering. After the slag is dried, platinum is recovered from the filter residue, and aluminum sulfate is recovered from the filtrate. After testing, the platinum content is 2.08%, enriched by 10.95 times, and the leaching rate of alumina is 96.09%.

Embodiment 3

[0036] A certain spherical (particle size 1-2 mm) platinum-containing spent catalyst, containing 0.19% platinum. Firstly, it is calcined at 580°C for 1 hour under air atmosphere and natural particle size. Weigh 100 g of the platinum-containing spent catalyst pretreated by roasting, place it in the activation leaching equipment with 800 mL of sulfuric acid (mass concentration: 40%), and add 1100 zirconia balls with a ratio of Φ10:Φ6:Φ4 =3:4:4. grams, the filling rate is 40%, set the rotation speed at 8 r / min, start heating, leaching at 100°C for 2 hours and then filtering. After the slag is dried, platinum is recovered from the filter residue, and aluminum sulfate is recovered from the filtrate. After testing, the platinum content is 2.02%, enriched by 10.63 times, and the leaching rate of alumina is 94.09%.

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Abstract

The invention provides a method and equipment for leaching a platinum-containing waste catalyst through mechanical activation. In the method, calcined and pretreated raw materials together with an acid solution are added into rotatable activation leaching equipment filled with an activation medium for activation extraction. The activation leaching equipment comprises a barrel body, wherein the barrel body is driven by a motor to rotate, and heating elements are arranged at the periphery of the barrel body, and are used for heating the barrel body. In the invention, the mechanical activation and the leaching process are closely combined together, so that the reaction can be carried out at a normal pressure and temperature, thus requirements for the equipment are lowered; the method has theadvantages of high matrix dissolving efficiency, high enrichment degree of platinum, less consumption of acid, reduced slag and follow-up processes, simple process flow and few operating steps; and the activation leaching equipment has the characteristics of simple structure, easiness for operation, low investment, low energy consumption, low cost and high benefit.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a method and equipment for activating and leaching waste catalysts containing platinum in the petrochemical industry. Background technique [0002] Platinum is extremely chemically inert at high temperatures and has unique catalytic properties. Therefore, platinum-containing catalysts are widely used in the automotive, chemical and petroleum refining industries. Platinum-containing catalysts in the petrochemical industry will be deactivated after being used for a period of time due to surface carbon deposition and other reasons. After several cycles of regeneration, they will become spent catalysts. [0003] Since 2003, the global supply of platinum has been in short supply, and the content of metallic platinum in the catalyst is much higher than that in the ore, so it has become a very important secondary resource of platinum and has a very high recovery value. Recov...

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 张保钢戴曦邬建辉
Owner 上海派特贵金属环保科技有限公司
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