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Regeneration and reactivation method for carbon deposition inactivation catalyst

A technology for deactivating catalysts and catalysts, which is used in catalyst regeneration/reactivation, catalyst activation/preparation, chemical instruments and methods, etc.

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the deactivated catalyst caused by carbon deposition, its activity can be restored by regeneration, but for the deactivated catalyst caused by metal deposition pollution, it cannot be regenerated to restore its activity, so it can only be discarded.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take a deactivated type II active phase hydrotreating catalyst with a carbon deposit of 4.9% and a sulfur content of 10.1%, and perform charcoal regeneration under different conditions in an oxygen-containing atmosphere.

[0023] Condition 1: Take 500mL deactivated catalyst, raise the temperature to 550°C at a heating rate of 3°C / min, and keep the temperature at 550°C for 3 hours. The obtained sample is named C1, and its carbon content is 0.05%.

[0024]Condition 2: Take 500mL deactivated catalyst, heat up to 230°C at a heating rate of 3°C / min, keep the temperature at 230°C for 10 hours, then continue to heat up to 350°C at a constant temperature of 3°C / min for 3 hours, and obtain The sample named C2 has a carbon content of 1.42%.

[0025] Condition 3: take 500mL deactivated catalyst, heat up to 300°C at a heating rate of 3°C / min, keep the temperature at 300°C for 6 hours, then continue to heat up at a heating rate of 3°C / min to 380°C for 5 hours, and obtain The sample...

Embodiment 2

[0027] Activate the regenerants C1 and C2 with ammonia water and citric acid. Take the mixed solution of ammonia water and citric acid and spray and immerse C1 and C2 in equal volumes. The molar ratio of NH3 and citric acid in the solution to the Ni atom on the regenerant is 2:0.8:1. After the sample is left for 4 hours, dry it at 120°C for 4 hours. The obtained catalysts were designated as C1-1 and C2-1, respectively.

Embodiment 3

[0029] Regenerant C2 is activated with ethanolamine and ethylene glycol. Take the mixed solution of ethanolamine and ethylene glycol and spray and immerse C2 in equal volume. The molar ratio of ethanolamine and ethylene glycol in the solution to the Ni atom on the regenerant is 0.8:1:1. After the sample is left for 4 hours, dry it at 120°C for 4 hours. The obtained catalysts were designated as C2-2, respectively.

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PUM

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Abstract

The present invention relates to a regeneration and reactivation method for a carbon deposition inactivation catalyst. The carbon deposition inactivation catalyst comprises a VIB group metal component and a VIII group metal component. According to the method, under the effect of oxygen-containing gas, the carbon deposition of the inactivated catalyst is removed, such that the mass of the carbon is 0.5-2% of the mass of the catalyst; then the resulting catalyst contacts a solution containing an alkaline substance and a solution containing an organic additive; finally a heat treatment is performed to obtain the catalyst with the recovered activity. Compared to the prior art, the catalyst regenerated and reactivated by the method of the present invention has good activity and good stability.

Description

technical field [0001] The invention relates to a method for regenerating and revitalizing a carbon-deposited deactivated hydrogenation treatment catalyst, in particular to a method for regenerating and reviving a catalyst containing type II active centers. Background technique [0002] Hydroprocessing is a very important process for converting crude oil into high-value products, and its core is a hydroprocessing catalyst. In order to improve the activity of the catalyst, people have prepared type II active phase catalysts with high latent activity of the active center. The interaction between the active metal and the support is low, so it is easier to be completely vulcanized, and it is a stacked (stacked) MoS2 structure, which is a high-sulfur coordination. The active phase, usually stacked (laminated) together in larger sheets, is not connected to the support. In the preparation process of the type II active phase catalyst, the active hydrogenation metal components are n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/12B01J37/00
Inventor 杨占林姜虹彭绍忠王继锋唐兆吉魏登凌温德荣
Owner CHINA PETROLEUM & CHEM CORP