A kind of recovery method of rhodium catalyst

The technology of a rhodium catalyst and a recovery method is applied in the direction of improving the process efficiency, etc., and can solve the problems of low recovery rate of rhodium, complicated process and the like, and achieve the effect of high efficiency and quickness of the recovery method.

Inactive Publication Date: 2015-10-28
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to: provide a kind of simple, efficient rhodium recovery method, to overcome the defective that original recovery method technique is complicated or / and rhodium recovery rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take by weighing 200.0 milliliters of catalyst waste liquid containing rhodium 3.1 mg / ml, wherein containing 0.62 grams of rhodium, add 0.4338 grams of elemental magnesium, heat and stir at 60 ° C for 1 hour, then add 4.4 grams of 10% hydrochloric acid to dissolve residual magnesium, After 2 hours, the upper liquid was decanted, and the remaining solid was dried at 100°C to obtain 0.6116 g, with a rhodium recovery rate of 98.65%.

Embodiment 2

[0017] Weigh 200.0 milliliters of catalyst waste liquid containing rhodium 3.1 mg / ml, wherein contains 0.62 grams of rhodium, add 0.1193 grams of elemental aluminum, heat and stir at 100 ° C for 3 hours, then add 0.22 grams of 10% hydrochloric acid to dissolve residual aluminum, After 2 hours, the upper liquid was decanted, and the remaining solid was dried at 100°C to obtain 0.6083 g, with a rhodium recovery rate of 98.11%.

Embodiment 3

[0019] Take by weighing 200.0 milliliters of catalyst waste liquid containing rhodium 3.1 mg / ml, wherein containing 0.62 grams of rhodium, add 0.7833 grams of elemental zinc, heat and stir at 80 ° C for 2 hours, then add 2.2 grams of 10% hydrochloric acid to dissolve residual zinc, After 2 hours, the upper liquid was decanted, and the remaining solid was dried at 100°C to obtain 0.6095 g, with a rhodium recovery rate of 98.31%.

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Abstract

The invention discloses a method for recovering a rhodium catalyst, which belongs to the field of catalysts. Active metals are used as displacing agents to separate rhodium in a solution from waste rhodium catalyst liquid in the form of precipitation. The invention is a simple and efficient rhodium recovery method, which overcomes the defects of complex process and / or low recovery rate of rhodium in the original recovery method.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a method for recovering spent rhodium catalysts for oxo synthesis. Background technique [0002] Rhodium catalysts are widely used in oxo synthesis of aldehydes, acetic anhydride and other chemicals. They are important organic chemical raw materials and are widely used in many fields of the national economy such as medicine, food, spices and plastics. In the production process, in addition to the products, by-products such as tar are often generated. The tar is very destructive to the catalyst and will wrap the rhodium to deactivate the catalyst and stop the reaction. Therefore, the tar generated during the reaction must be removed from the reaction system. Since the tar discharged from the reaction system is wrapped with expensive rhodium, it is necessary to recover rhodium. There are many recovery methods, and there are three typical ones: the first one is the temperature-programmed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/00
CPCY02P10/20
Inventor 张华西李荣雍永怙蒋贵仲
Owner HAO HUA CHENGDU TECH
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