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Method for recovering rhodium complex catalyst

A technology of catalysts and complexes, which is applied in the field of complex catalysts remaining in the recovery device, and can solve problems such as expensive, difficult recovery, and uneconomical

Inactive Publication Date: 2007-09-26
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complex catalyst, especially its component rhodium, is expensive, and it is uneconomical to discard it together with the washed wastewater
However, the concentration of the complex catalyst in the water discharged after cleaning is extremely low, so it is difficult to recover the complex catalyst or rhodium from the wastewater after cleaning.

Method used

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  • Method for recovering rhodium complex catalyst
  • Method for recovering rhodium complex catalyst
  • Method for recovering rhodium complex catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0068]Use CSTR type reactor 1, take toluene as reaction solvent, under the existence of the rhodium complex catalyst that ligand is triphenylphosphine, make the propylene supplied by pipeline 5 and the molar ratio supplied by pipeline 6 be 1 :1 hydrogen and carbon monoxide mixed gas (hereinafter referred to as "oxygen-containing gas") react to continuously produce butyraldehyde. The reaction product liquid taken out from the reactor 1 is introduced into the gas-liquid separator 2 through the pipeline 7 , and the product liquid is supplied to the distillation column 3 through the pipeline 8 after gas-liquid separation. Butyraldehyde is distilled out from the pipeline 12 at the top of the tower, and the bottom liquid of the rhodium-containing complex catalyst is taken out from the pipeline 10 at the bottom of the tower, and it is circulated in the reactor 1 as a catalytic liquid. In addition, a part of the catalytic liquid was supplied to the distillation column 4 from the line ...

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Abstract

A method for recovering a complex catalyst remaining in a reactor for a hydroformylation reaction of an olefin in the presence of a rhodium-trivalent organic phosphorus complex catalyst dissolved in a solvent for the reaction after a liquid containing the complex catalyst is withdrawn from the reactor, characterized in that it comprises washing the inside of the reactor with a liquid not deactivating the catalyst, to thereby dissolve the residual complex catalyst in the liquid used for the washing, followed by recovering the liquid. The method can be used, when a liquid is withdrawn from a reactor for a hydroformylation reaction to carry out a periodical inspection or the like, for recovering a complex catalyst remaining in the reactor with good efficiency.

Description

technical field [0001] The present invention relates to effectively recovering the complex remaining in the device when the liquid is taken out from the device in the hydroformylation reaction of olefins using a rhodium-trivalent organophosphorus complex catalyst, etc. method of catalysts. Background technique [0002] The production of aldehydes by hydroformylation of olefins with hydrogen-carbon monoxide gas mixtures is known and has been widely industrialized. As a catalyst for this hydroformylation reaction, a complex catalyst of a Group VIII B metal having a trivalent organic phosphorus compound as a ligand is generally used. Among them, rhodium shows good catalytic activity and extremely high selectivity to aldehydes even under conditions of relatively low temperature and low pressure, and is therefore widely used. [0003] Disclosed in No. 45-10730 bulletin of special publication is the hydroformylation method of the α-olefin that takes complex compound as catalyst,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22
CPCB01J2531/822B01J31/185B01J31/24B01J31/4046B01J2231/321
Inventor 藤田裕一川崎弘贵
Owner MITSUBISHI RAYON CO LTD
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