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

A technology for deactivating catalysts and cleaning agents, which is used in catalyst regeneration/reactivation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effect of reducing carbon deposits and reducing toxicity

Active Publication Date: 2009-06-10
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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  • Carbon deposit cleaning agent and its application in reproduction of deactivation catalyst
  • Carbon deposit cleaning agent and its application in reproduction of deactivation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]In the flask of 1000ml, add carbon deposit cleaning agent (its specific composition and its content are shown in Table 1) to the hydrodesulfurization MoNiP / Al of 100ml deactivated residual oil 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.

[0031] Table 1 Residual oil hydrodesulfurization MoNiP / Al 2 o 3 Change results of coke content of deactivated catalyst after treatment

[0032]

[0033] As can be seen from Table 1, compared with the deactivated catalyst that only ethanol and benzene or kerosene and gasoline are processed, with the catalyst that the carbon deposit cleaning agent solution of the present invention is processed, the amount of carbon deposits all significan...

Embodiment 2

[0042] In the flask of 1000ml, add carbon deposit cleaning agent (its concrete composition and its content are shown in Table 3) to the 100ml Mo / HZSM-5 methane aromatization catalyst (numbering is B, and carbon deposit content is 10.84wt% after an industrial operation) ) were processed respectively, and the treated catalyst continued to be processed with absolute ethanol, and then the content changes of amorphous and graphite-like carbon deposits were measured with a thermogravimeter, and the results are shown in Table 3.

[0043] Table 3 Change results of coke content in methane aromatization Mo / HZSM-5 catalyst after treatment

[0044]

[0045] As can be seen from Table 3, the carbon deposit cleaning agent of the present invention contains other at least An organic substance, which is more conducive to reducing the carbon deposition on non-hydrogenation catalysts, especially has a special effect on the removal of amorphous structure carbon deposition.

[0046] The above-m...

Embodiment 3

[0054] 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:

[0055] 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.

[0056] The 15ml catalyst that regenerates like this is packed in microreactor, carry out activity evaluation according to following condition:

[0057] 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: butyl acetate 5-95 v%, diethyleneglycol monobutyl ether 5-95 v%, isopropanol 0-90 v%, and toluene 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 benefits. [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 generated...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/52B01J38/02
Inventor 张喜文凌凤香孙万富赵荣林
Owner CHINA PETROLEUM & CHEM CORP
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