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Catalyst regeneration process

A technology for catalysts and catalytic reactions, applied in catalyst regeneration/reactivation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of high energy consumption and unsatisfactory regeneration effect, and achieve the effect of simple operation

Active Publication Date: 2013-03-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems with this method are high energy consumption and unsatisfactory regeneration effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 5g deactivator, 50g methanol 65 ℃ after washing 30 minutes, wash 10 minutes with deionized water, adopt the formic acid of preparation, hydrogen peroxide (30wt%) mixed solution 50g (hydrogen peroxide: formic acid mass ratio is 1: 1) Wash in a three-necked flask at 40°C for 8 hours, feed slowly in a dropwise manner, and analyze the regenerant C% as 3.0%.

Embodiment 2

[0031] 5g deactivator, 50g methanol 65 ℃ after washing 30 minutes, wash 10 minutes with deionized water, adopt the formic acid of preparation, hydrogen peroxide (30wt%) mixed solution 50g (hydrogen peroxide: formic acid mass ratio is 1: 1) Wash in a three-necked flask at 80°C for 8 hours, feed slowly and dropwise, and analyze the regenerant C% as 1.5%.

Embodiment 3

[0033] 5g deactivator, 50g methanol 65 ℃ after washing 30 minutes, wash 10 minutes with deionized water, adopt the formic acid of preparation, hydrogen peroxide (30wt%) mixed solution 50g (hydrogen peroxide: formic acid mass ratio is 1: 1) Wash in a three-neck flask at 90°C for 8 hours, and feed slowly in a dropwise manner. The analysis of regenerant C% is 1.4%.

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PUM

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Abstract

The invention discloses a regeneration method of a catalyst which is characterized in that the method comprises the step of using a mixed solution to process a titanium-silicon molecular sieve deactivated in a catalytic oxidation reaction under the temperature between 40 and 120 DEG C, the mixed solution is the mixture of water solution of hydrogen peroxide and an organic acid compound with a molecular structural formula of H(CH2)nCOOH, wherein, the numeric area of n is between 0 and 3; and the weight percentage of the hydrogen peroxide and the organic acid compound ranges from 1 to 8 :1.

Description

technical field [0001] The present invention relates to a kind of regeneration method of catalyst, more specifically, the present invention relates to a kind of regeneration method of deactivated titanium silicon molecular sieve catalyst used for 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 introduced during t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/90B01J29/89B01J38/62B01J38/52
Inventor 林民王梅正朱斌汝迎春舒兴田
Owner CHINA PETROLEUM & CHEM CORP