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Method for enriching rhodium from rhodium-containing organic waste liquid

An organic waste liquid, enrichment technology, applied in the field of enrichment of rhodium, can solve problems such as difficulty in generating precipitation, and achieve the effects of simple subsequent treatment process, cost reduction, and simple process

Inactive Publication Date: 2012-11-28
KUNMING INST OF PRECIOUS METALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the higher the deactivation degree of the rhodium catalyst, the more difficult it is to generate precipitation. The advantage of the precipitation method is that the partially deactivated catalyst can be directly activated to obtain a fresh catalyst, but the catalyst with a higher degree of deactivation is not suitable for activation by this method.

Method used

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  • Method for enriching rhodium from rhodium-containing organic waste liquid

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1, see attached figure 1 In the experiment, we weighed 500g of trapping agent, reducing agent (including 82.19% of fixed carbon) with a ratio of 5% of the trapping agent, additives with a ratio of 30% of the trapping agent, mixed with a three-dimensional mixer, and added organic rhodium The solution is 500ml, and it is reduced and smelted in a high-temperature resistance furnace, the reduction temperature is 1300°C, and the reduction time is 10h. The obtained rhodium alloy is selectively leached base metals with dilute acid (20%) to obtain rhodium enrichment, and the direct recovery rate is 99.2%.

Embodiment 2

[0022] Embodiment 2, see attached figure 1 In the experiment, we weighed 500g of trapping agent, reducing agent (including 82.19% of fixed carbon) with a ratio of 5% of the trapping agent, additives with a ratio of 30% of the trapping agent, mixed with a three-dimensional mixer, and added organic rhodium The solution is 500ml, and it is reduced and smelted in a high-temperature resistance furnace, with a reduction temperature of 1350°C and a reduction time of 8 hours. The obtained rhodium alloy is selectively leached base metals with dilute acid (20%) to obtain rhodium enrichment, and the direct recovery rate is 99.5%.

Embodiment 3

[0023] Example 3, the experiment weighed 500g of trapping agent, reducing agent (containing 82.19% of fixed carbon) ratio is 5% of trapping agent, additive ratio is 30% of trapping agent, using a three-dimensional mixer to mix, Add 500ml of organic rhodium solution, and carry out reduction smelting in a high-temperature resistance furnace, the reduction temperature is 1400°C, and the reduction time is 6h. The obtained rhodium alloy is selectively leached base metals with dilute acid (20%) to obtain rhodium enrichment, and the direct recovery rate is 99.5%.

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Abstract

The invention discloses a method for enriching rhodium from a rhodium-containing organic waste liquid, which comprises the following steps: mixing a rhodium-containing organic waste liquid with collector, additive and reducer according to a certain ratio; performing reduction smelting to obtain a rhodium-containing alloy; and using dilute acid to leach base metal from the alloy to obtain a rhodium-enriched substance. The method has the advantages of simple operation, concise process, high recovery rate and the like; the noble metal rhodium content of smelting slag is smaller than 0.5g / t; the rhodium-enriched substance content is greater than 25%; and the direct yield is greater than 99.2%.

Description

technical field [0001] The invention belongs to the field of precious metal metallurgy and relates to a method for enriching rhodium. In particular, it relates to a method for enriching rhodium from rhodium-containing organic waste liquid. Background technique [0002] At present, there are mainly the following methods for enriching rhodium in rhodium-containing organic waste liquid: 1. Precipitation method: using hydrolysis precipitation or other chemical reagent precipitation to enrich rhodium and other precious metals is a classic method and is also the current production practice. One of the rare methods. However, the higher the deactivation degree of the rhodium catalyst is, the more difficult it is to generate precipitation. The advantage of the precipitation method is that the partially deactivated catalyst is directly activated to obtain a fresh catalyst, but the catalyst with a higher degree of deactivation is not suitable for activation by this method. 2. Washing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00
CPCY02P10/20
Inventor 吴跃东董海刚付光强范兴祥赵家春李博捷刘扬
Owner KUNMING INST OF PRECIOUS METALS
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