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

A deactivated catalyst and cleaning agent technology, applied in the direction of catalyst regeneration/reactivation, chemical/physical process, physical/chemical process catalyst, etc., to achieve the effect of low toxicity and reduce carbon deposition

Active Publication Date: 2007-10-03
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

[0030]In the flask of 1000ml, add carbon deposit cleaning agent (its specific composition and content are shown in Table 1) to hydrodesulfurization MoNiP / Al of 100ml deactivated residual oil after an industrial operation 2 o 3 Catalyst (numbering is A, and coke content is 11.45wt%) is processed respectively, and the catalyst after the treatment continues to process 30min with dehydrated alcohol, then measures the content change of amorphous and graphite-like shape coke with thermogravimeter, and the result See Table 1.

[0031]

[0032] As can be seen from Table 1, compared with the deactivated catalysts that have only been processed with ethanol and benzene or kerosene and gasoline, the catalyst that adopts the carbon deposit cleaning agent solution of the present invention to process, the amount of carbon deposits all significantly reduces, especially without The relative content of fixed carbon deposits decreased significantly.

[0033] It can also be seen from ...

Embodiment 2

[0040] In the flask of 1000ml, add carbon deposit cleaning agent (its concrete component and 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 for 30 min, 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.

[0041]

Carbon cleaning agent

deal with

condition

residual product

Charcoal

quantity,

wt%

Thermogravimetric Results: Accounting for Residue

Carbon content, wt%

amorphous

graphite-like

-

287ml ethanol

287ml benzene

to soak

16h,

direct

to distill

2 hours

10.21

86

14

150ml propylene glycol ...

Embodiment 3

[0050] 100ml deactivated hydrofining MoNiP / Al after an industrial operation 2 o 3 Catalyst (numbering is C, carbon deposit content is 10.21wt%) adopts the following method to regenerate:

[0051] 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.

[0052] The 15ml catalyst that regenerates like this is packed in microreactor, carry out activity evaluation according to following condition:

[0053] 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...

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PUM

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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: propylene glycol methyl ether acetate 5-95 v%, propanediol ethyl ether 5-95 v%, dipropylene glycol methyl ether 0-90 v%, propanediol methyl ether 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): B01J38/52
Inventor 张喜文凌凤香孙万富王少军
Owner CHINA PETROLEUM & CHEM CORP
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