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Regeneration method of deactivated hydrogenation catalyst

A hydrogenation catalyst, catalyst technology, applied in catalyst regeneration/reactivation, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as environmental pollution

Pending Publication Date: 2020-10-02
湖北中超化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the drying process of the catalyst, ammonia nitrogen compounds are released, causing certain pollution to the environment

Method used

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  • Regeneration method of deactivated hydrogenation catalyst
  • Regeneration method of deactivated hydrogenation catalyst
  • Regeneration method of deactivated hydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Catalyst A1 after taking by weighing a certain amount of burning charcoal (deactivated catalyst A1 active component is Mo, Ni, and the content of Mo is 23%, and the content of Ni is 3.85%, all the other are Al 2 o 3 ; The regeneration temperature is 430°C), with an aqueous solution containing glycerol for immersion, and the immersion time is 35min. The molar ratio of glycerol to Mo and Ni metal atoms in the impregnation solution is 0.5:1, the microwave power is 8W / g, the vacuum pressure is 0.07MPa, and the treatment time is 15min. Catalyst F-1 was obtained.

Embodiment 2

[0037] Catalyst A2 after taking by weighing a certain amount of burning charcoal (deactivated catalyst A2 active component is Mo, Ni, and the content of Mo is 22.5%, and the content of Ni is 4.0%, all the other are Al 2 o 3 ; the regeneration temperature is 440°C), impregnate with an aqueous solution containing maleic acid, the impregnation time is 38min, the molar ratio of maleic acid to Ni metal atoms in the impregnation solution is 0.6:1, the microwave power is 10W / g, vacuum The pressure is 0.07MPa, and the treatment time is 20min. Catalyst F-2 is obtained.

Embodiment 3

[0039] Catalyst A3 after taking by weighing a certain amount of burning charcoal (deactivated catalyst A3 active component is W, Ni, and the content of W is 22.5%, and the content of Ni is 3.75%, and all the other are Al 2 o 3; The regeneration temperature is 430°C), impregnated with an aqueous solution containing butanediol, the impregnation time is 40min, the molar ratio of butanediol to Ni metal atoms in the impregnation solution is 0.7:1, the power of the microwave is 12W / g, vacuum The pressure is 0.08MPa, and the processing time is 18min. Catalyst F-3 is obtained.

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Abstract

The invention provides a regeneration method of an deactivated hydrogenation catalyst. The regeneration method comprises the following steps: carrying out charking treatment on the inactivated hydrogenation catalyst; dipping the charked deactivated hydrogenation catalyst in a solution containing a hydroxyl and / or carboxyl chelated ligand compound; and carrying out microwave vacuum drying on the catalyst subjected to dipping treatment so that the deactivated hydrogenation catalyst then recovers the activity. According to the technical scheme, microwave vacuum drying is adopted, due to the factthat operation is carried out under the condition of air isolation, oxygenolysis cannot occur in the drying process even if the decomposition temperature of an organic additive is high, and the utilization rate of the organic additive is remarkably increased.

Description

technical field [0001] The invention relates to a catalyst regeneration and revival method. In particular, it is suitable for the hydrogenation catalyst regeneration and revival method in the hydrogenation denitrogenation and desulfurization process of heavy distillate oil. Background technique [0002] The hydrotreating process of petroleum fractions is one of the effective means to produce clean fuels, and its core is a hydrotreating catalyst. During long-term use, due to chemical reactions such as condensation and dehydrogenation on the surface of the catalyst, macromolecular carbon-containing compounds are formed, covering the active center of the catalyst, reducing the effective surface area of ​​the catalyst reaction, and finally making the catalyst completely inactive. By means of regeneration-resurrection, the activity of the old catalyst is restored, the disposal of the old catalyst is reduced, the operating cost of the refinery is reduced, the environment is prote...

Claims

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Application Information

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IPC IPC(8): B01J31/40B01J38/00B01J38/02B01J38/52B01J38/48B01J31/22B01J37/34B01J37/20C10G45/08C10G45/04
CPCB01J31/403B01J31/4084B01J38/02B01J38/52B01J38/485B01J31/2213B01J31/2239B01J37/346B01J37/20C10G45/08C10G45/04C10G2300/202
Inventor 张锋
Owner 湖北中超化工科技有限公司
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