A kind of recovery treatment method of low concentration platinum in organic waste liquid

An organic waste liquid, recycling and processing technology, applied in the direction of process efficiency improvement, instruments, electrolysis components, etc., can solve the problems of difficult recovery of low-concentration platinum and high energy consumption, shorten the electrolysis time, reduce energy consumption, and solve the problem of recycling difficult effect

Active Publication Date: 2022-02-15
WANHUA CHEM GRP CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for recovering and treating low-concentration platinum in organic waste liquid. The platinum element in anhydrous (approximately anhydrous) organic waste liquid is recovered by a three-dimensional electrode electrodeposition method, and at the same time, positive ions are set in the three-dimensional electrode The exchange resin adsorbs and intercepts platinum ions, which can solve the technical problems of difficult recovery and high energy consumption of low-concentration platinum in organic waste liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Take 10g of 732-type cation exchange resin, 10g of carbon steel balls and 10g of titanium balls, mix them evenly, and fill them into the three-dimensional electrode bed.

[0056] 200g dimethyl sebacate rectification still raffinate, 2g water, 1g potassium hydroxide and 4g methanol are stirred evenly (platinum content after mixing is 19.3ppm), the material after mixing is pumped with the feeding rate of 80L / h Put it into the three-dimensional electrode electrolytic cell, react at 60°C for 20 minutes, and the current density of the electrolytic cell is 200A / m 2 , Electrolysis voltage 4.2V. After the reaction was completed, the platinum ion content in the waste liquid was detected to be 0.3 ppm, and the platinum recovery rate was calculated to be 98.45%.

[0057] Post-processing of metal platinum recovery: take out the filling material in the three-dimensional electrode bed, and use a 14-mesh sieve (mesh size 1.40mm) to sieve and separate the inert conductive material dep...

Embodiment 2

[0059] Take 4.3g of D113 type cation exchange resin, 8.6g of magnesium balls and 17.2g of spherical ferrite, mix them evenly and fill them into the three-dimensional electrode bed.

[0060] 200g dimethyl sebacate rectifying still raffinate, 6g water, 2g sodium hydroxide and 8g ethanol are stirred evenly (platinum content after mixing is 18.5ppm), the material after mixing is pumped with the feeding rate of 80L / h Put it into the three-dimensional electrode electrolytic cell, react at 20°C for 10 minutes, and the current density of the electrolytic cell is 400A / m 2 , Electrolysis voltage 5.0V.

[0061] The post-treatment method in Example 1 was adopted to obtain high-quality pure platinum. The platinum ion content in the waste liquid was detected to be 0.1ppm, and the calculated platinum recovery rate was 99.5%.

Embodiment 3

[0063] Take 5.5g of D001 type cation exchange resin, 2.73g of aluminum balls and 16.4g of spherical activated carbon, mix them evenly and fill them into the three-dimensional electrode bed.

[0064] 200g dimethyl sebacate rectification still raffinate, 12g water, 6g potassium methylate and 20g amyl alcohol are stirred evenly (platinum content after mixing is 16.8ppm), the material after mixing is pumped with the feed rate of 80L / h Put it into the three-dimensional electrode electrolytic cell, react at 80°C for 5 minutes, and the current density of the electrolytic cell is 800A / m 2 , Electrolytic voltage 4.8V.

[0065] The post-treatment method in Example 1 was adopted to obtain high-quality pure platinum. The platinum ion content in the waste liquid was detected to be 153ppb, and the calculated platinum recovery rate was 99.1%.

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Abstract

The invention provides a method for recovering and treating low-concentration platinum in organic waste liquid. The method includes the following steps: A. Filling ion exchange resin, inert conductive material, and sacrificial anode metal balls into the electrochemical three-dimensional electrode bed, constructing Three-dimensional electrode system; B. Using the above-mentioned three-dimensional electrode system to carry out electrodeposition recovery of platinum in organic waste liquid. The invention not only solves the problem of difficult recovery of low-concentration platinum, but also has the advantages of simple process and low energy consumption, and is suitable for wide industrial applications.

Description

technical field [0001] The invention relates to a treatment method, in particular to a recovery treatment method for low-concentration platinum in organic waste liquid. Background technique [0002] Scrap containing platinum group metals (PGM) is a valuable secondary energy source, and strengthening the recovery of platinum group metals in waste is of great significance for social and economic development and the realization of circular economy. The traditional recovery method of platinum in organic waste liquid is to incinerate the organic phase and dissolve the residue with aqua regia, and then extract and recover the platinum-containing substance in the residue with an extraction agent. However, the further separation process of the platinum-containing substance and the extraction agent is relatively complicated. Long cycle, intermittent operation, incomplete separation and large loss of platinum in the separation process. At present, platinum in organic waste liquid with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/20C25C7/04C25C7/02
CPCC25C1/20C25C7/04C25C7/02Y02P10/20
Inventor 栾谨鑫刘释水钱向阳李俊平杜旺明
Owner WANHUA CHEM GRP CO LTD
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