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A two-stage reactor hydrocracking process for heavy oil

A hydrocracking and reactor technology, applied in hydroprocessing process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems that the catalyst is difficult to exert special catalytic effect, catalyst deactivation, etc.

Active Publication Date: 2022-03-18
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the one-stage reactor hydrocracking technology is still the most widely used in the field of heavy oil hydrocracking technology. The catalyst addition scheme used in the one-stage hydrocracking technology is mainly: single or multi-component catalysts are mixed with heavy oil raw materials evenly. , mixed with hydrogen into the reactor, and reacted under the designed conditions; since heavy oil involves multiple reactions in the hydrocracking system, different types of reactions have different requirements for catalyst types. When multiple catalysts and heavy oil When the raw materials are mixed together into the reactor, the coke generated by the reaction will lead to the deactivation of various catalysts, and it is difficult for various catalysts to exert their respective special catalytic effects

Method used

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  • A two-stage reactor hydrocracking process for heavy oil

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Comparison scheme
Effect test

Embodiment 1

[0025] A heavy oil two-stage reactor hydrocracking process, the specific steps include:

[0026] step one

[0027] Iron oxyhydroxide catalyst, vacuum residue and first sulfurizing agent 4 are uniformly mixed in the first feed tank 6 and mixed with high-pressure hydrogen 1, and then enter the first-stage hydrocracking reactor 8 through the first delivery pump 19 Carrying out the reaction; the hydro-upgrading liquid product produced by the first-stage hydrocracking reactor 8 is discharged from the first-stage hydrocracking reactor 8;

[0028] step two

[0029] Molybdenum oxide / (cobalt oxide + nickel oxide) catalyst with a mass ratio of 1:1, desolidified / recycled tail oil 16 and second vulcanizing agent 18 are uniformly mixed in the second feed tank 7 and passed through the second delivery pump 20, It is mixed with the hydro-upgrading liquid product discharged from the first-stage hydrocracking reactor 8 in step 1, and enters the second-stage hydrogenation reactor 9 for reactio...

Embodiment 2

[0040] A heavy oil two-stage reactor hydrocracking process, the specific steps include:

[0041] step one

[0042]The red mud catalyst, vacuum residue and first sulfiding agent 4 are uniformly mixed in the first feed tank 6 and then mixed with high-pressure hydrogen 1, and then enter the first-stage hydrocracking reactor 8 through the first delivery pump 19 for further processing. Reaction; the hydro-upgrading liquid product produced by the first-stage hydrocracking reactor 8 is discharged from the first-stage hydrocracking reactor 8;

[0043] step two

[0044] The mass ratio is 1:1 molybdenum disulfide / (cobalt sulfide+nickel sulfide) catalyst, desolidified / recycled tail oil 16 and second sulfide agent 18 are uniformly mixed in the second feed tank 7 and passed through the second delivery pump 20 and In step 1, the hydrogenated and upgraded liquid products discharged from the first-stage hydrocracking reactor 8 are mixed, and enter the second-stage hydrogenation reactor 9 fo...

Embodiment 3

[0055] A heavy oil two-stage reactor hydrocracking process, the specific steps include:

[0056] step one

[0057] The iron sulfide catalyst, vacuum residue and the first sulfiding agent 4 are uniformly mixed in the first feed tank 6 and then mixed with the high-pressure hydrogen 1, and then enter the first-stage hydrocracking reactor 8 through the first delivery pump 19 for further processing. Reaction; the hydro-upgrading liquid product produced by the first-stage hydrocracking reactor 8 is discharged from the first-stage hydrocracking reactor 8;

[0058] step two

[0059] The mass ratio is 1:1 molybdenum sulfide / (cobalt sulfide+nickel sulfide) catalyst, desolidified / recycled tail oil 16 and second sulfide agent 18 are uniformly mixed in the second feed tank 7 and then passed through the second delivery pump 20 and step The hydrogenation-upgrading liquid products discharged from the first-stage hydrocracking reactor 8 are mixed together, and enter the second-stage hydrogen...

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Abstract

A two-stage reactor hydrocracking process for heavy oil. The heavy oil raw material, catalyst and sulfidation agent are mixed uniformly and then mixed with high-pressure hydrogen into the first stage hydrocracking reactor for reaction. The catalyst, desolidified / recycled tail oil and sulfide After the agent is mixed evenly in the second feeding tank, it is mixed with the hydro-upgrading liquid product discharged from the first-stage hydrocracking reactor through the delivery pump, and injected into the second-stage hydrocracking reactor for reaction, reducing the heavy oil The colloid, asphaltene content and coking tendency of heavy oil in the second-stage hydrocracking reactor can improve the coking potential of heavy oil and prolong the life of the catalyst in the second-stage hydrocracking reactor; Desulfurization and denitrification effects in the hydrocracking reactor; the reaction characteristics of heavy oil in the two-stage hydrocracking reactor match the catalytic function of the catalyst, optimize the catalyst activity, and be able to produce low-sulfur, low-nitrogen high-quality fuel oil and reduce hydrocracking technical operating costs.

Description

technical field [0001] The invention relates to the technical field of heavy oil hydrocracking, in particular to a heavy oil two-stage reactor hydrocracking process. Background technique [0002] Heavy oil hydrocracking technology refers to the technology of producing light fuel oil through hydrogenation reforming and cracking reaction under the action of high temperature and high pressure and hydrogenation catalyst. At present, the one-stage reactor hydrocracking technology is still the most widely used in the field of heavy oil hydrocracking technology. The catalyst addition scheme used in the one-stage hydrocracking technology is mainly: single or multi-component catalysts are mixed with heavy oil raw materials evenly. , mixed with hydrogen into the reactor, and reacted under the designed conditions; since heavy oil involves multiple reactions in the hydrocracking system, different types of reactions have different requirements for catalyst types. When multiple catalysts ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02
Inventor 黄传峰戴鑫李大鹏杨天华杨涛李伟焦有军张轩杨程朱永红
Owner SHAANXI YANCHANG PETROLEUM GRP