Rhodium catalyst recycling method

A technology of rhodium catalyst and recovery method, which is applied in the direction of improving process efficiency, etc., can solve the problems of low recovery rate of rhodium and complex process, etc., and achieve the effect of efficient and fast recovery method

Active Publication Date: 2014-01-08
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%.

[0016]

Embodiment 2

[0018] 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%.

[0019]

Embodiment 3

[0021] 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 rhodium catalyst recycling method and belongs to the field of catalysts. The rhodium catalyst recycling method includes utilizing active metal as displacer so as to separate rhodium in solution from waste liquid of rhodium catalyst in a precipitation manner. The rhodium catalyst recycling method is simple and efficient and overcomes the defects of complexity in process and/or low rhodium recycling rate.

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 Applications(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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