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Technology method for extracting precious metal from homogeneous phase waste liquid

A process method and precious metal technology, applied in the field of precious metal extraction, can solve the problems that triphenylphosphine cannot be effectively treated and recycled, the process operating environment is harsh, and the precious metal recovery rate is low, so as to reduce one-time investment costs and operation and maintenance costs. Low, the effect of flexible control of production management

Inactive Publication Date: 2020-08-14
上海御盾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the one-time investment of the equipment using the above-mentioned process is relatively large, and there are the following problems in actual industrial production: the operating environment of the process is harsh, a large amount of triphenylphosphine remains in the distillation residue and cannot be effectively treated and recycled, and the recovery rate of precious metals Low, the operation process has a certain risk of explosion, and the operation and maintenance costs are high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] S1. Measure 5kg of homogeneous waste liquid and place it in a heating container, heat it to 80°C, add resin accounting for 10% of the volume of the homogeneous waste liquid to the heated homogeneous waste liquid for adsorption. The resin is added in the process Stir continuously, after the resin is completely added, let it settle for 2 hours, and obtain the adsorption solid phase containing precious metals and the lean phase waste liquid through filtration and separation;

[0021] S2. Transfer the lean phase waste liquid in step S1 to a distillation kettle for heating and distillation to 95°C to obtain triphenylphosphine and a light organic phase;

[0022] S3. Place the noble metal-containing adsorption solid phase in step S1 in an incinerator at 600°C for full incineration to obtain a solid slag containing noble metal;

[0023] S4. Dissolve the noble metal-containing solid slag obtained in step S3 in aqua regia, obtain the filtrate through filtration, which is the noble metal...

Embodiment 2

[0026] S1. Measure 10kg of homogeneous waste liquid and place it in a heating container, heat it to 95°C, add silica gel accounting for 20% of the volume of the homogeneous waste liquid to the heated homogeneous waste liquid for adsorption, during the process of adding resin Stir continuously, after the resin is completely added, let it settle for 2 hours, and obtain the adsorption solid phase containing precious metals and the lean phase waste liquid through filtration and separation;

[0027] S2. Transfer the lean phase waste liquid in step S1 to a distillation kettle for heating and distillation to 80°C to obtain triphenylphosphine and a light organic phase;

[0028] S3. Place the noble metal-containing adsorption solid phase in step S1 in an incinerator at 700° C. for full incineration to obtain a solid slag containing noble metal;

[0029] S4. Dissolve the noble metal-containing solid residue obtained in step S3 in hydrochloric acid / sodium chlorate, obtain the filtrate through f...

Embodiment 3

[0032] S1. Measure 15kg of homogeneous waste liquid and place it in a heating container, heat it to 120°C, add a mixture of resin and activated carbon accounting for 25% of the volume of the homogeneous waste liquid to the heated homogeneous waste liquid for adsorption. Stir continuously during the adding process, after the resin is completely added, let it settle for 2 hours, and obtain the adsorption solid phase containing precious metals and the lean phase waste liquid after filtration and separation;

[0033] S2. Transfer the lean phase waste liquid in step S1 to a distillation kettle for heating and distillation to 170° C. to obtain triphenylphosphine and a light organic phase;

[0034] S3. Place the noble metal-containing adsorption solid phase in step S1 in an incinerator at 750°C for full incineration to obtain a solid slag containing noble metals;

[0035] S4. Dissolve the noble metal-containing solid slag obtained in step S3 in aqua regia, obtain the filtrate through filtra...

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Abstract

The invention discloses a technology method for extracting precious metal from homogeneous phase waste liquid. The technology method includes the steps that firstly, the homogeneous phase waste liquidis heated to 80 DEG C-300 DEG C, then an adsorbing agent is added in the heated homogeneous phase waste liquid, stirring and adsorbing are conducted continuously, an adsorption solid phase containingprecious metal and lean phase waste liquid are obtained through filtering separation, and the adsorption solid phase and the lean phase waste liquid are cooled to the room temperature respectively; the obtained lean phase waste liquid is subjected to proper distillation separation, triphenylphosphine and a light organic phase are obtained; the obtained adsorption solid phase containing the precious metal is subjected to high-temperature firing treatment so that organic matter can be removed, and solid slag containing precious metal is obtained; and the obtained solid slag containing the precious metal is subjected to acid liquid dissolving, then purification is conducted, and pure precious metal is obtained. The technology method for extracting the precious metal from the homogeneous phase waste liquid has the beneficial effects of being low in cost, high in recovery rate, easy and convenient to operate, environment-friendly and the like.

Description

Technical field [0001] The invention relates to the technical field of precious metal recovery, in particular to a process method for extracting precious metals from homogeneous waste liquid. Background technique [0002] Noble metals mainly refer to gold, silver and platinum group metals. Platinum group metals include ruthenium, rhodium, palladium, osmium, iridium, and platinum. Most of these metals have beautiful colors and are highly resistant to chemicals. They are not easy under normal conditions. Causes a chemical reaction, so it has high value and is widely used in various fields. In recent years, the consumption of precious metals has been increasing year by year. However, the abundance of precious metals in the earth's crust is low, the distribution is sparse, and separation and purification are difficult. In order to solve the contradiction between resource shortage and increasing demand, one of the most important solutions is to recover and reuse precious metals from ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/00C22B1/00
CPCC22B1/005C22B7/00C22B7/007C22B11/042
Inventor 刘炳安
Owner 上海御盾新材料科技有限公司
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