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Improved titanium-containing catalyst regeneration method

A technology of titanium catalyst and compound, applied in the field of regeneration of titanium-containing catalyst, can solve the problem of high energy consumption, and achieve the effects of improving selectivity, reducing dosage and reducing cost

Active Publication Date: 2009-06-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem with this method is the high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]5g of the deactivated catalyst was mixed and washed with 50g of formic acid and 50g of hydrogen peroxide (30wt%) at 90°C under normal pressure for 8h, followed by washing, filtering and drying. The dried regenerant is then treated with high-temperature steam at 300°C for 6 hours. The evaluation experiment shows that the selectivity of propylene oxide is 97.52%, and the conversion rate of hydrogen peroxide is 39.00%.

Embodiment 2

[0045] 5g of the deactivated catalyst was mixed and washed with 50g of formic acid and 50g of hydrogen peroxide (30wt%) at 90°C under normal pressure for 8h, followed by washing, filtering and drying. The dried regenerant is then treated with high-temperature steam at 350°C for 12 hours. The evaluation experiment shows that the selectivity of propylene oxide is 98.02%, and the conversion rate of hydrogen peroxide is 42.00%.

Embodiment 3

[0047] 5g of the deactivated catalyst was mixed and washed with 50g of formic acid and 50g of hydrogen peroxide (30wt%) at 80°C under normal pressure for 8h, followed by washing, filtering and drying. The dried regenerant is then treated with high-temperature steam at 300°C for 6 hours. The evaluation experiment shows that the selectivity of propylene oxide is 97.40%, and the conversion rate of hydrogen peroxide is 37.50%.

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PUM

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Abstract

The invention discloses an improved method for regenerating titanium-containing catalysts. The method is characterized by comprising the steps of using a mixed solution of a hydrogen peroxide aqueous solution and organic acidic compounds to treat a deactivated titanium-containing catalyst and then adopting high-temperature water vapor or a high-temperature organic solvent for treatment. The method can realize the complete regeneration of deactivated agents, and has the advantages of regeneration effects superior to the methods in the prior patents, simple operation, energy conservation and high efficiency.

Description

technical field [0001] The present invention relates to a method for regenerating a deactivated titanium-containing catalyst, and more particularly, the present invention relates to a method for regenerating a deactivated titanium-containing catalyst used in an oxidation reaction. Background technique [0002] In 1983, Italian scientist Taramasso et al. discovered a titanium-silicon molecular sieve with an MFI structure, which exhibited excellent catalytic performance in catalytic oxidation reactions. Since then, titanium-silicon molecular sieves have been widely used in the direct oxidation reaction of hydrogen peroxide and organic matter, such as the ammoximation reaction of aromatics, olefins, alcohols, nitrogen-containing compounds, and carbonyl-containing compounds. However, usually after a period of operation, the catalytic performance of the catalyst will deteriorate, and the catalyst will be deactivated. The cause of catalyst deactivation may be that impurities intr...

Claims

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Application Information

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IPC IPC(8): B01J29/90B01J29/89B01J38/70B01J38/06B01J38/04
Inventor 林民王梅正朱斌汝迎春舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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