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

A technology for deactivating catalysts and cleaning agents, which is used in catalyst regeneration/reactivation, chemical/physical process, physical/chemical process catalysts, etc., to reduce carbon deposits and reduce toxicity

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

[0029] Add a carbon deposit cleaning agent (see Table 1 for its specific composition and content) into a 1000ml flask to hydrodesulfurize a 100ml residue MoNiP / Al after an industrial operation 2 O 3The deactivated catalyst (coded as A, coke content of 11.45wt%) was treated separately, and the treated catalyst was treated with absolute ethanol for 30 minutes, and then the change in the content of amorphous and graphite-like coke was measured with a thermogravimetry. The results are shown in Table 1.

[0030]

[0031] It can be seen from Table 1 that compared with the deactivated catalyst treated with ethanol and benzene or kerosene and gasoline alone, the amount of coke deposited on the catalyst treated with the coke deposit cleaning agent solution of the present invention is significantly reduced, especially without The relative content of shaped coke deposits is significantly reduced.

[0032] It can also be seen from Table 1 that when benzene, ethanol, gasoline, and ke...

Embodiment 2

[0039] Add the coke deposit cleaning agent (see Table 3 for its specific composition and content) into a 1000ml flask to a 100ml Mo / HZSM-5 methane aromatization catalyst after industrial operation (code B, coke content of 10.84wt% ) Were treated separately, the treated catalyst was treated with absolute ethanol for 30 minutes, and then the content of amorphous and graphite-like carbon deposits was measured with a thermogravimetry. The results are shown in Table 3.

[0040]

Carbon deposit cleaning agent

deal with

Condition

Remaining product

Charcoal

the amount,

wt%

Thermogravimetric results: surplus

The content of residual carbon,

wt%

Amorphous

Graphite-like

-

287ml ethanol

287ml benzene

Soak for 16h, steam

Distillation 2h

10.21

86

14

350ml propylene glycol ether

150ml chlorinated ethylene

150ml isohexanol

-

6.75

76 ...

Embodiment 3

[0049] Hydrotreating 100ml of MoNiP / Al after an industrial operation 2 O 3 The deactivated catalyst (coded as C, with a carbon deposit content of 10.21wt%) is regenerated in the following way:

[0050] First put the catalyst into the regeneration unit, first use N 2 The device is replaced, the oxygen content is adjusted to 2.0v%, and the catalyst is regenerated by burning charcoal step by step. The main control conditions for each stage are: constant temperature at 120°C for 3h; constant temperature at 200°C for 2h; constant temperature at 300°C for 1.5h; constant temperature at 500°C for 3h.

[0051] The 15ml catalyst regenerated in this way was put into the micro-reactor, and the activity evaluation was carried out according to the following conditions:

[0052] Raw material oil: 950μg / g pyridine / lamp oil; volumetric space velocity: 2.0h -1 ; Temperature: 360°C: Reaction pressure: 4.0 MPa; Hydrogen flow rate: 100 ml / min. After 12 hours of stability, samples were taken for analys...

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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: propanediol ethyl ether 5-95 v%, ethylene dichloride 5-95 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 coke deposit cleaning agent and its application in the regeneration process of a deactivated catalyst, and is particularly suitable for the regeneration of a deactivated hydrogenation catalyst. Background technique [0002] Catalysts (such as hydrogenation 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 coke on the surface of the catalyst. These coke-deactivated catalysts are regenerated by removing coke-deposits through oxidation and burning, and their 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 deactivated coke deposit catalyst is burnt and regenerated, the coke deposit will react with oxygen and be removed, and a large amoun...

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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