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Carbon deposit cleaning agent and its application in reproduction of carbon deposit deactivation catalyst

A technology for deactivating catalysts and cleaning agents, applied in catalyst regeneration/reactivation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effect of low toxicity and reduced carbon deposition

Active Publication Date: 2006-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reason for the deactivation of the catalyst deactivated by carbon deposition is obviously different from that of the titanium-containing heterogeneous catalyst used in the ethylene epoxidation reaction in the above patent, so the reaction principle of the above method cannot be applied to the catalyst deactivated by carbon deposition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]In a 1000ml flask, add a carbon deposit cleaning agent (see Table 1 for specific composition and content) to hydrodesulfurize MoNiP / Al 100ml deactivated residue after an industrial operation 2 o 3 Catalyst (numbering is A, carbon deposition content is 11.45wt%) is processed respectively, and the catalyst after processing continues to process with dehydrated alcohol, measures the content change of amorphous and graphite-like shape carbon deposition with thermogravimeter then, its result sees Table 1.

[0032]

[0033] As can be seen from Table 1, compared with the deactivated catalysts that are only processed with kerosene and gasoline, the amount of carbon deposits of the catalysts processed with the carbon deposit cleaning agent of the present invention are all significantly reduced, especially the relative amount of amorphous carbon deposits. The decrease in content is very obvious.

[0034] It can also be seen from Table 1 that the higher the ethyl acetate...

Embodiment 2

[0041] In the flask of 1000ml, add carbon deposit cleaning agent (concrete composition and content see Table 3) to the 100ml Mo / HZSM-5 methane aromatization catalyst (numbering is B, carbon deposit content is 10.84wt%) after an industrial operation After the treatment, the treated catalyst was continued to be treated with absolute ethanol for 30 minutes, and then the content changes of amorphous and graphite-like carbon deposits were measured with a thermogravimeter. The results are shown in Table 3.

[0042]

Carbon cleaning agent

solvent

deal with

condition

residual product

carbon content,

wt%

Thermogravimetry Results: Occupancy

The content of residual carbon deposits,

wt%

amorphous

graphite-like

-

431ml kerosene

144ml petrol

Soak for 16h, straight

Distillation 2h

10.21

86

14

15ml benzene

20ml ethanol

2...

Embodiment 3

[0051] 100ml hydrotreating MoNiP / Al after an industrial operation 2 o 3 Deactivated catalyst (coded as C, carbon deposit content is 10.21wt%) is regenerated in the following way:

[0052] First, the catalyst is loaded into the regeneration unit, and the N 2 The device is replaced, and then the oxygen content is adjusted to 2.0v%, and the catalyst is regenerated by burning charcoal step by step. The main control conditions at each stage are: 120°C, constant temperature for 3h; 200°C constant temperature for 2h; 300°C constant temperature for 1.5h; 500°C constant temperature for 3h.

[0053] The 15ml catalyst that regenerates like this is packed in microreactor, carry out activity evaluation according to following condition:

[0054] Raw oil: 950μg / g pyridine / kerosene; volumetric space velocity: 2.0h -1 ;Temperature: 360°C: Reaction pressure: 4.0MPa; Hydrogen flow rate: 100ml / min. Samples were taken for analysis after 12 hours of stabilization. The nitrogen content in the ...

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Abstract

The invention discloses a carbon build-up cleaning agent and its use in the regeneration process of devitalized catalyst, the carbon build-up cleaning agent comprises the following components: acetic ether 5-95 v%, acetone 5-95 v%, ethanol 0-90 v%, benzene 0-90 v%. The carbon build-up cleaning agent can be used for catalysts with appreciable heat release during regeneration, especially for devitalized hydrogenation catalyst and methane aromatization catalyst requiring oxidation burning-out for carbon build-up cleaning.

Description

technical field [0001] The invention relates to a carbon deposit cleaning agent and its application in the regeneration process of deactivated catalysts, especially suitable for the regeneration of deactivated hydrogenation catalysts. Background technique [0002] Catalysts used in refining and chemical processes will gradually lose their activity during long-term operation. The reason is largely due to the deposition of carbon deposits on the surface of the catalyst. These coke-deactivated catalysts are regenerated by oxidizing and burning off the coke, and the activity can be partially or completely restored, and they can still be used in industrial production. Some catalysts can even be regenerated multiple times to achieve the purpose of saving energy and increasing efficiency. [0003] When the carbon deposition deactivation catalyst is regenerated by burning carbon, the carbon deposition will react with oxygen and be removed, and a large amount of heat will be generat...

Claims

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Application Information

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IPC IPC(8): B01J38/52C10G45/04C10G47/00
Inventor 张喜文凌凤香孙万富王少军
Owner CHINA PETROLEUM & CHEM CORP
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