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Method for separating precious metal from waste liquid-phase organic matters through thermal cracking

A technology of organic matter and waste liquid, which is applied in the field of separating precious metals, can solve the problems of low overall recovery rate of precious metals and serious environmental pollution, and achieve the effects of low cost, reduced energy consumption, and improved efficiency

Active Publication Date: 2021-10-22
NIUTECH ENVIRONMENT TECHNOLOGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The adsorption separation method is to add a selective adsorbent to the spent catalyst to adsorb the precious metal catalyst, and then use benzene as a solvent to thoroughly wash off the high boiling point by-products in the catalyst, The corresponding precious metals are obtained after analysis-purification and purification. Using this method, a large amount of organic solvents are used in the recovery process, which seriously pollutes the environment, and the overall recovery rate of precious metals is not high.

Method used

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  • Method for separating precious metal from waste liquid-phase organic matters through thermal cracking
  • Method for separating precious metal from waste liquid-phase organic matters through thermal cracking
  • Method for separating precious metal from waste liquid-phase organic matters through thermal cracking

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Embodiment 1

[0034] A method for separating precious metals from waste liquid-phase organic matter by thermal cracking. The waste liquid-phase organic matter is a rhodium-containing homogeneous waste catalyst in the petrochemical industry, and its form is relatively viscous liquid. The specific steps of the method are as follows:

[0035] The rhodium-containing homogeneous spent catalyst is placed in the sub-packaging container, and the addition is 80% of the volume of the sub-packaging container, and then the sub-packaging container is sent into a cracking device, and a hot air chamber is arranged outside the cracking device. The containers are distributed in the middle and upper part of the cracking device, and the lower part of the cracking device is the inlet of the hot air chamber, which can ensure the uniform heat transfer of the hot air between each sub-packaging container and improve the overall cracking efficiency;

[0036] After that, control the temperature of the cracker to even...

Embodiment 2

[0040] A method for separating precious metals from waste liquid-phase organic matter by thermal cracking. The waste liquid-phase organic matter is a palladium catalyst in the petrochemical industry, and its form is relatively viscous liquid. The specific steps of the method are as follows:

[0041] The liquid palladium catalyst is placed in the sub-packaging container, and the addition is 60% of the volume of the sub-packaging container, and then the sub-packaging container is sent into the cracking device, and a hot air chamber is arranged on the outside of the cracking device. In the middle and upper part of the cracking device, the lower part of the cracking device is the inlet of the hot air chamber, which can ensure the uniform heat transfer of the hot air between each sub-packaging container and improve the overall cracking efficiency;

[0042] The cracking device is connected with a gas collection device, which is used to collect and recycle the gaseous products produce...

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Abstract

The invention provides a method for separating precious metal from waste liquid-phase organic matters through thermal cracking. The method for separating the precious metal from the waste liquid-phase organic matters through thermal cracking comprises the following steps that the waste liquid-phase organic matters containing the precious metal are placed in a split charging container and fed into a cracking device, then the temperature of the cracking device is controlled to uniformly rise to 380-400 DEG C, and staying is conducted for 0.5-3 hours; and the waste liquid-phase organic matters containing the precious metal are supplemented into the split charging container until the volume of the waste liquid-phase organic matters reaches the initial volume, continued to stay at 380-400 DEG C for 1-3 hours, uniformly heating to 580-620 DEG C is conducted until no gas product is generated in the cracking device, residues in the split charging container is the products with higher content of precious metal, and the precious metal in the split charging container is recycled through the prior art. According to the method for separating the precious metal from the waste liquid-phase organic matters through thermal cracking, the pyrolyzable organic matters can be partially converted into the gaseous products in a high-temperature pyrolysis mode, so that the gaseous product is separated from solid components, compared with an existing adsorption treatment mode, the cost is lower, and the gaseous product can be recycled.

Description

technical field [0001] The invention belongs to the field of recycling precious metals, and in particular relates to a method for separating precious metals from waste liquid-phase organic matter by thermal cracking. Background technique [0002] The contents of ruthenium, rhodium, palladium, osmium, iridium, and platinum in the earth's crust are very small. These 6 elements are chemically called platinum group elements. Together with silver and gold, they are collectively called noble metals. The above-mentioned noble metals are All kinds of homogeneous catalysts composed of carrier heterogeneous catalysts of catalytically active components and platinum group metal inorganic compounds or organometallic complexes are collectively referred to as noble metal catalysts; platinum group metals are easy to adsorb on the surface because their d electron orbitals are not filled. The reactant, with moderate strength, is conducive to the formation of intermediate "active compounds", h...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/02
CPCC22B7/001C22B11/026Y02P10/20
Inventor 牛晓璐牛小川赵凤娇时圣玉侯家彤张海敏童兰英韩国乾牛斌
Owner NIUTECH ENVIRONMENT TECHNOLOGY CORPORATION