Method for smelting and extracting platinum metal from alumina-supported petrochemical catalyst

A petrochemical catalyst, alumina carrier technology, applied in the direction of improving process efficiency, can solve the problems of complex tail liquid treatment process, high viscosity, high ion concentration in solution, avoid waste liquid treatment and filtration difficulties, and strong material adaptability , the effect of efficient capture

Inactive Publication Date: 2013-04-03
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are high acid consumption, high solution ion concentration, high viscosity, difficult filtration, and complicated tail liquid treatment process
[0008] To sum up, various methods have the

Method used

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  • Method for smelting and extracting platinum metal from alumina-supported petrochemical catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, see attached figure 1 , Weigh 25 grams of ≥ 100 mesh alumina carrier petrochemical catalyst (containing palladium 1865g / t), add 50 grams of iron oxide, 10 grams of carbon powder, 25 grams of sodium salt, mix well, put it into a No. 3 clay graphite crucible, and place The temperature was raised to 1400° C. in the muffle furnace, and the temperature was kept constant for 30 minutes. The separated slag phase was taken out, the slag weighed 56.85 grams, and contained 6.54 g / t of palladium. Precious metal alloy phase powder, add 4 N sulfuric acid solution, solid-liquid ratio S:L=1:12. The reaction temperature is room temperature at the beginning, after the reaction is slow, the temperature is raised to 70°C, stirred at constant temperature for 4 hours, filtered, the palladium content in the filtrate is all <0.0005 g / L, the obtained precious metal concentrate is added with 6N hydrochloric acid, the reaction temperature is 90°C, and the reaction time For 8 hours, ...

Embodiment 2

[0026] Embodiment 2, see attached figure 1 , weigh 25 grams of ≥ 100 mesh alumina carrier petrochemical catalyst (containing palladium 1865g / t), add 25 grams of iron copper powder, 5 grams of carbon powder, 25 grams of sodium salt, mix well, put it into a clay graphite crucible No. 3, and place The temperature was raised to 1400° C. in the muffle furnace, and the temperature was kept constant for 30 minutes. The separated slag phase was taken out, the slag weighed 42.02 grams and contained 151g / t of palladium. Precious metal alloy phase powder, add 4 N sulfuric acid solution, S:L=1:12. The reaction temperature is room temperature at the beginning, after the reaction is slow, the temperature is raised to 70°C, stirred at constant temperature for 4 hours, filtered, the palladium content in the filtrate is all <0.0005 g / L, the obtained precious metal concentrate is added with 6N hydrochloric acid, the reaction temperature is 90°C, and the reaction time For 8 hours, the oxidizin...

Embodiment 3

[0027] Embodiment 3, see attached figure 1 , weigh 25 grams of ≥100 mesh alumina carrier petrochemical catalyst (containing platinum 2200g / t), add 25 grams of iron oxide, 5 grams of carbon powder, 25 grams of sodium salt, mix well, put it into a No. 3 clay graphite crucible, and place The temperature was raised to 1400° C. in the muffle furnace, and the temperature was kept constant for 30 minutes. The separated slag phase was taken out, the slag weighed 49.44g and contained 8.50g / t of platinum. Precious metal alloy phase powder, add 4 N sulfuric acid solution, S:L=1:12. The reaction temperature is room temperature at the beginning, after the reaction is slow, the temperature is raised to 70°C, stirred at constant temperature for 4 hours, filtered, the palladium content in the filtrate is all <0.0005 g / L, the obtained precious metal concentrate is added with 6N hydrochloric acid, the reaction temperature is 80-90°C, The reaction time is 8 hours, the oxidant is sodium chlorat...

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Abstract

The invention discloses a method for smelting and extracting platinum metal from an alumina-supported petrochemical catalyst, and the method comprises the following steps: mixing the alumina-supported petrochemical catalyst with a trapping agent, a reductant and a slag forming agent and then smelting to trap the platinum metal from the alumina-supported petrochemical catalyst to obtain subsidiary product and alloy containing the platinum metal; using a sulfuric acid solution to dissolve the alloy containing the platinum metal to separate noble metal and base metal so as to obtain noble metal ore; and refining the noble metal ore to obtain the platinum metal product. The method disclosed by the invention has the characteristics that the process design does not produce wastewater, the wastewater treatment and filtration difficulty in a wet treatment process of the alumina-supported petrochemical catalyst are avoided, the recycling rate is higher than 98%, and the product purity is 99.95%.

Description

technical field [0001] The invention relates to a method for extracting precious metals, in particular to a method for smelting and extracting platinum group metals from alumina carrier petrochemical catalysts. Background technique [0002] The total grade of platinum group metals in the ore is as low as 0.1g / t, generally about 3-6g / t, so it is difficult to extract and the output is very small. Platinum group metals have many unique and superior physical and chemical properties. As a strategic material, they are widely used in modern industry, military industry and high-tech industries. Petrochemical catalysts generally contain 1,000-3,000 g / t of platinum group metals, and the extraction of platinum group metals from them has a short process and low cost. [0003] Most of the petrochemical catalysts are based on alumina. There are several methods for extracting platinum group metals from alumina-supported petrochemical catalysts: [0004] Pyrochlorination and volatilizatio...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/00
CPCY02P10/20
Inventor 吴晓峰董海刚童伟锋范兴祥陈家林赵家春雷云吴跃东李博捷杨海琼闫君禺
Owner KUNMING INST OF PRECIOUS METALS
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