Method for recovering rhodium from rhodium-containing organic wastewater to prepare rhodium chloride

An organic waste liquid, rhodium trichloride technology, applied in chemical instruments and methods, inorganic chemistry, preparation of ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, etc., to achieve large adsorption capacity, easy operation, high adsorption rate high effect

Active Publication Date: 2019-12-24
XIAN CATALYST NEW MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is easy to operate, does not produce secondary waste gas and waste water, and is environmentally friendly. It is suitable for rhodium-containing organic waste liquid produced in the production process of homogeneous catalysts, and solves the problem of recovering rhodium from the organic phase. The recovery rate of rhodium can reach above 95

Method used

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  • Method for recovering rhodium from rhodium-containing organic wastewater to prepare rhodium chloride
  • Method for recovering rhodium from rhodium-containing organic wastewater to prepare rhodium chloride
  • Method for recovering rhodium from rhodium-containing organic wastewater to prepare rhodium chloride

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Step 1. Adsorption: Adsorb the rhodium in the rhodium-containing organic waste liquid produced in the production process of the rhodium homogeneous catalyst onto the polymer adsorbent in the form of dynamic adsorption to obtain the rhodium-containing adsorbent; the specific process is: A polymer adsorbent with imino groups (such as a polymer bonded with dihydrocarbyl sulfide, the polymer is a polymer of N,N-methylenebisacrylamide and vinylimidazole, or Polymer of ethylene glycol dimethacrylate and acrylic acid) 10g filled into In the adsorption column, use a peristaltic pump to pass 1500mL rhodium-containing organic waste liquid through the adsorption column at a speed of 1mL / min, and the rhodium in the rhodium-containing organic waste liquid is adsorbed on the polymer adsorbent in the form of dynamic adsorption to obtain agent; the temperature of the adsorption is 25 ℃, and the mass content of rhodium in the rhodium-containing organic waste liquid is 156ppm; the rhod...

Embodiment 2

[0042] Step 1. Adsorption: Adsorb the rhodium in the rhodium-containing organic waste liquid produced in the production process of the rhodium homogeneous catalyst onto the polymer adsorbent in the form of dynamic adsorption to obtain the rhodium-containing adsorbent; the specific process is: the rhodium containing sulfoxide Polymer adsorbents with groups and imino groups (such as polymers bonded with dihydrocarbyl sulfoxides, wherein the polymers are polymers of N,N-methylenebisacrylamide and vinylimidazole, or polymer of ethylene glycol dimethacrylate and acrylic acid) 10g filled into In the adsorption column, use a peristaltic pump to pass 30000mL rhodium-containing organic waste liquid through the adsorption column at a speed of 30mL / min, and the rhodium in the rhodium-containing organic waste liquid is adsorbed on the polymer adsorbent in the form of dynamic adsorption to obtain agent; the temperature of the adsorption is 40 ℃, and the mass content of rhodium in the rhod...

Embodiment 3

[0050] Step 1. Adsorption: Adsorb the rhodium in the rhodium-containing organic waste liquid generated during the production process of the rhodium homogeneous catalyst onto the polymer adsorbent in the form of dynamic adsorption to obtain the rhodium-containing adsorbent; the specific process is: containing sulfoxide group and a polymer adsorbent of imino group (such as a polymer bonded with dihydrocarbyl sulfoxide, wherein the polymer is a polymer of N,N-methylenebisacrylamide and vinylimidazole, or Polymer of ethylene glycol dimethacrylate and acrylic acid) 50g filled into In the adsorption column, use a peristaltic pump to pass 5000mL of rhodium-containing organic waste liquid through the adsorption column at a speed of 1mL / min, and the rhodium in the rhodium-containing organic waste liquid is adsorbed on the polymer adsorbent in the form of dynamic adsorption to obtain agent; the temperature of the adsorption is 60 ℃, and the mass content of rhodium in the rhodium-cont...

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Abstract

The invention discloses a method for recovering rhodium from rhodium-containing organic wastewater to prepare rhodium chloride. The method includes the steps that first, a macromolecule adsorbent is adopted for adsorbing the rhodium in the rhodium-containing organic wastewater produced in the production process of a rhodium homogeneous catalyst onto an adsorbent in a dynamic adsorption mode; second, the rhodium-containing adsorbent is put into acid solvent, a certain amount of stannous chloride is added, backflow stirring is conducted, the rhodium is transferred into the solvent from the solidadsorbent, and a rhodium-containing aqueous phase solution is obtained by means of filtration; third, purification is performed; and fourth, the rhodium chloride is obtained through evaporation and concentration. The method is suitable for the rhodium-containing organic wastewater produced in the production process of the homogeneous catalyst, and the problem of recovering the rhodium from an organic phase is solved. The method is easy and simple to handle, no secondary exhaust gas and wastewater can be produced, going green and environmental protection are realized, and the recovery rate ofthe rhodium can reach 95% or above.

Description

technical field [0001] The invention belongs to the technical field of precious metal recovery, in particular to a method for recovering rhodium from rhodium-containing organic waste liquid to prepare rhodium trichloride. Background technique [0002] Rhodium-containing homogeneous catalysts play an important role in chemical synthesis, and are widely used in the catalytic hydrogenation of olefins, the carbonylation of methanol to acetic acid, and the hydrogenation of propylene to aldehydes. The main rhodium-containing homogeneous catalysts are: triphenylphosphine rhodium chloride, rhodium octanoate, triphenylphosphine carbonyl rhodium acetylacetonate (rhodium parka), etc. The yield of these catalysts cannot reach 100% when they are prepared, and organic waste liquid containing rhodium will inevitably be produced. Due to the high price of rhodium and the scarcity of resources, the rhodium content in these waste liquids is already very high relative to the rhodium content in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00C01G55/00
CPCC01G55/001C01G55/005C22B7/00C22B11/00
Inventor 潘丽娟张蕾校大伟魏芳玲黎鹏万克柔曾永康张之翔
Owner XIAN CATALYST NEW MATERIALS CO LTD
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