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Method of recycling ruthenium trichloride from waste carbon ruthenium-supporting catalyst

A ruthenium catalyst, ruthenium trichloride technology, applied in chemical recovery, chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum halide, etc., can solve the problems of large environmental pollution and low recovery efficiency of precious metals , to achieve the effect of less solid impurities and good quality

Inactive Publication Date: 2016-12-07
陕西瑞科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for reclaiming ruthenium trichloride from waste carbon-supported ruthenium catalysts, which solves the problems of large environmental pollution and low recovery efficiency of precious metals in existing recovery processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1, treating the recovered carbon-supported ruthenium or other noble metal catalysts at 600°C for 10 hours to fully ash the activated carbon;

[0023] Step 2, put the incinerated ashes in step 1 into NaOH and NaNO 3 in the mixed solution, then put it in a muffle furnace for 500°C roasting for 5 hours, cool to room temperature, and the roasted product is ready for use; wherein, the ratio of ash powder to the mixed solution is 1:8, and the NaOH and NaNO in the mixed solution 3 The dosage ratio is 1:1.

[0024] Step 3, soak the roasted product obtained in step 2 with hot water at 60°C, after filtering, add an oxidant to the filtrate while raising the temperature to 40°C, stir for 30 minutes, and then add concentrated H 2 SO 4 , after stirring, absorb the generated RuO with 20% HCl solution 4 , get RuCl 3 solution, put the solution in a rotary evaporator in a water bath at 80°C and dry it to obtain solid ruthenium trichloride. Among them, the oxidizing agent is NaC...

Embodiment 2

[0026] Step 1, treating the recovered carbon-supported ruthenium or other noble metal catalysts at 700°C for 8 hours to fully ash the activated carbon;

[0027] Step 2, put the incinerated ashes in step 1 into NaOH and NaNO 3 in the mixed solution, and then put it in a muffle furnace for 550°C roasting for 4 hours, cool to room temperature, and the roasted product is ready for use; wherein, the ratio of ash powder to the mixed solution is 1:9, and NaOH and NaNO in the mixed solution 3 The dosage ratio is 1:1.2.

[0028] Step 3, soak the roasted product obtained in step 2 with hot water at 60°C, after filtering, add an oxidant to the filtrate while raising the temperature to 40°C, stir for 30 minutes, and then add concentrated H 2 SO 4 , after stirring, absorb the generated RuO with 20% HCl solution 4 , get RuCl 3 solution, put the solution in a rotary evaporator at 110°C in a water bath and dry it to obtain solid ruthenium trichloride. Among them, the oxidizing agent is N...

Embodiment 3

[0030] Step 1, treating the recovered carbon-supported ruthenium or other noble metal catalysts at 800°C for 6 hours to fully ash the activated carbon;

[0031] Step 2, put the incinerated ashes in step 1 into NaOH and NaNO 3 Then put it in a muffle furnace for 3h at 600°C, cool to room temperature, and the roasted product is ready for use; wherein, the ratio of ash powder to the mixed solution is 1:10, and NaOH and NaNO in the mixed solution 3 The dosage ratio is 1:1.5.

[0032] Step 3, soak the roasted product obtained in step 2 with hot water at 60°C, after filtering, add an oxidant to the filtrate while raising the temperature to 40°C, stir for 30 minutes, and then add concentrated H 2 SO 4 , after stirring, absorb the generated RuO with 20% HCl solution 4 , get RuCl 3 solution, put the solution in a rotary evaporator at 140°C in a water bath to dry it up to obtain solid ruthenium trichloride. Among them, the oxidizing agent is NaClO 3 , the dosage ratio of oxidant a...

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PUM

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Abstract

The invention discloses a method of recycling ruthenium trichloride from waste carbon ruthenium-supporting catalyst. The recycled carbon ruthenium-supporting catalyst or other noble metal catalysts are subjected sequentially to incineration, alkali solution, leaching, oxidative absorption and smelt-drying to finally extract ruthenium trichloride; by combining the alkali solution method, the oxidative absorption method and the traditional recycling process for the noble metal, ruthenium, it is possible to solve the problem that the metal ruthenium is insoluble in a strong acid; the oxidative absorption method may effectively separate ruthenium from other metals; the ruthenium trichloride recycled by using method has little impurity and good quality and may serve as a raw material for direct use in the preparation of catalysts, and no secondary pollution is caused to the environment during recycling.

Description

technical field [0001] The invention belongs to the technical field of precious metal recovery, and in particular relates to a method for recovering ruthenium trichloride from spent carbon-supported ruthenium catalysts. Background technique [0002] Catalysts containing precious metals are widely used in oxidation, dehydrogenation, organic synthesis, formaldehyde, carbonylation and other fields. The annual production and use of waste catalysts in various industries around the world is 3 to 3.5 million tons. Catalysts containing precious metals contain A large number of platinum group precious metals and their oxides mainly include silver, palladium, platinum, ruthenium, etc. Therefore, recycling precious metals from waste industrial catalysts and recycling them as secondary resources can not only obtain objective economic benefits, but also It can improve the utilization rate of resources and realize the sustainable development of resources. At present, the main recovery pr...

Claims

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Application Information

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IPC IPC(8): C01G55/00
CPCY02P20/584C01G55/005
Inventor 蔡万煜杜继山田洁
Owner 陕西瑞科新材料股份有限公司
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