Method for recovering high-purity metal palladium from organic waste palladium contained catalyst

A high-purity, metal palladium technology, which is applied in the field of chemical technology and the recovery of high-purity metal palladium, can solve the problems of high requirements for recycled containers, low palladium recovery rate, cumbersome steps, etc., to save time and improve environmental protection indicators , the effect of simple steps

Inactive Publication Date: 2014-02-05
ZHEJIANG METALLURGICAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the methods for recovering palladium from organic waste palladium catalyst mainly include incineration method and wet adsorption tower recovery method. Most of these methods have a long process and cumbersome steps, and have high requirements for recovery containers, and the recovery rate of palladium is not high and the quality is low

Method used

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  • Method for recovering high-purity metal palladium from organic waste palladium contained catalyst
  • Method for recovering high-purity metal palladium from organic waste palladium contained catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Get 100 kilograms of viscous solid waste organic palladium catalyst, palladium content 0.08%, put into oxygen-enriched incinerator, the volume flow rate of the air of oxygen-enriched incineration is 4 cubic meters per minute, and incineration process speed carries out incineration treatment with 50 kg / hour , incineration temperature 600 ℃, incineration for 2 hours to get 1.5 kg of crude palladium. Add hydrochloric acid and hydrogen peroxide to organic waste palladium (solid-to-liquid volume ratio is 1:5), wherein the weight ratio of hydrochloric acid and hydrogen peroxide is 9:1, react at 90°C for 5 hours, filter, and add reducing agent hydrazine hydrate to the filter residue to fully After the reaction, add hydrochloric acid and hydrogen peroxide for the second leaching. At this time, the weight ratio of the filter residue to the mixed solution is 1:3.5, and the reaction time is 3 hours at a temperature of 75°C. The two leached liquids were mixed to remove the acid, an...

Embodiment 2

[0024] Get 100 kilograms of viscous solid waste organic palladium catalyst, palladium content 0.08%, put into oxygen-enriched incinerator, the volume flow rate of the air of oxygen-enriched incineration is 6 cubic meters per minute, and incineration treatment speed carries out incineration treatment with 50 kilograms / hour , incineration temperature 650 ℃, incineration for 2 hours to get 1.49 kg of crude palladium. Add the mixed solution of hydrochloric acid, hydrogen peroxide and sodium hypochlorite into organic waste palladium (solid-liquid volume ratio is 1:7), wherein the weight ratio of hydrochloric acid and the mixed solution is 10:1, and in the mixed solution composed of hydrogen peroxide and sodium hypochlorite, two The weight ratio of the former is 4:1, react at 90°C for 5 hours, filter, and then add the mixed solution of hydrochloric acid, hydrogen peroxide and sodium hypochlorite for the second leaching after the filter residue is fully reacted with the reducing agent...

Embodiment 3

[0026] Get 100 kilograms of viscous solid waste organic palladium catalyst, palladium content 0.08%, put into oxygen-enriched incinerator, the volume flow rate of the air of oxygen-enriched incineration is 8 cubic meters per minute, incineration treatment speed carries out incineration treatment with 50 kilograms / hour , incineration temperature 750 ℃, incineration for 3 hours to get 1.51 kg of crude palladium. Add the mixed solution of hydrochloric acid and nitric acid and hydrogen peroxide to the organic waste palladium (solid-liquid volume ratio is 1:7), the mixed solution of hydrochloric acid and nitric acid, the weight ratio of the two is 7:1, and react at 90°C After 5 hours, filter, the filter residue is fully reacted with reducing agent hydrazine hydrate, and then the mixed solution of hydrochloric acid, nitric acid and hydrogen peroxide is added for the second leaching. At this time, the weight ratio of the filter residue and the mixed solution is 1:5. Reaction time 5 h...

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Abstract

The invention relates to the class of chemical technologies, belongs to the field of solid waste recovery and particularly relates to a method for recovering high-purity metal palladium from an organic waste palladium contained catalyst. The method comprises the steps of waste pretreatment, leaching, extraction, purification and hydrogenation preparation, thereby finally obtaining high-purity metal palladium. The method provided by the invention is simple in reaction step, short in time and capable of saving reagents; in addition, the recovery rate of palladium is up to over 99.2%, and the purity of recovered palladium is higher than 99.98%.

Description

technical field [0001] The invention relates to chemical technology and belongs to the field of solid waste recovery. It provides a method for recovering palladium, in particular to a method for recovering high-purity metal palladium from a catalyst containing organic waste palladium. Background technique [0002] As a rare and precious metal, palladium plays the role of catalyst in industrial production, such as plastic electroplating production process, fluoropiperidine, synthesis of toluene diisocyanate, and hydroprocessing of terephthalic acid, etc., all use palladium as a catalyst. Since palladium is a noble metal with scarce resources and high price, it is very important to recover organic waste palladium from deactivated catalysts. At present, the methods for recovering palladium from organic waste palladium catalyst mainly include incineration method and wet adsorption tower recovery method. Most of these methods have a long process and cumbersome steps, and have hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B3/08C22B3/42C22B11/00
CPCY02P10/20
Inventor 潘剑明刘秋香刘斌魏青魏小娟谢智平鞠景喜
Owner ZHEJIANG METALLURGICAL RES INST
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