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Method for hydrotreatment of heavy fraction of pyrolysis gasoline

A technology of pyrolysis gasoline and hydrogenation treatment, which is applied in the direction of hydrogenation treatment process, hydrocarbon oil treatment, petroleum industry, etc. It can solve the problems of large differences and inability to reduce other impurities, so as to reduce the reaction temperature, reduce equipment investment and operating costs , Guarantee the effect of the operation cycle

Active Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this hydrotreating process only aims at reducing diolefins in pyrolysis gasoline, and cannot reduce other impurities, and the catalyst used is completely different from this method. No matter the process flow, catalyst and processing purpose are quite different from this method.

Method used

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  • Method for hydrotreatment of heavy fraction of pyrolysis gasoline
  • Method for hydrotreatment of heavy fraction of pyrolysis gasoline
  • Method for hydrotreatment of heavy fraction of pyrolysis gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] pyrolysis gasoline C 9 ~C 10Fraction 1 enters the first reactor after being contacted with hydrogen, and the reaction conditions are: hydrogen partial pressure 3.5MPa, volume space velocity 2.0h -1 , The reaction temperature is 178°C, and then directly enters the second reactor. The reaction conditions are: hydrogen partial pressure 3.5MPa, volume space velocity 1.5h -1 , The reaction temperature is 280°C. The total hydrogen to oil volume ratio is 350:1. The properties of raw oil and test results are listed in Table 2.

[0025] It can be seen from Table 2 that this technology can effectively remove heteroatoms such as sulfur and nitrogen, and the product can meet the index requirements.

[0026] Table 2 Raw oil properties and test results

[0027]

Embodiment 2

[0029] pyrolysis gasoline C 9 ~C 10 Fraction 2 enters the first reactor after being contacted with hydrogen, and the reaction conditions are: hydrogen partial pressure 4.0MPa, volume space velocity 2.2h -1 , The reaction temperature is 172°C, and then directly enters the second reactor. The reaction conditions are: hydrogen partial pressure 4.0MPa, volume space velocity 1.4h -1 , The reaction temperature is 285°C. The total hydrogen to oil volume ratio is 380:1. The properties of raw oil and test results are listed in Table 3.

[0030] It can be seen from Table 3 that this technology can effectively remove heteroatoms such as sulfur and nitrogen, and the product can meet the index requirements.

[0031] Table 3 Raw oil properties and test results

[0032]

[0033]

Embodiment 3

[0035] pyrolysis gasoline C 9 ~C 10 Fraction 3 enters the first reactor after being contacted with hydrogen. The reaction conditions are: hydrogen partial pressure 3.6MPa, volume space velocity 2.5h -1 , The reaction temperature is 175°C, and then directly enters the second reactor. The reaction conditions are: hydrogen partial pressure 3.6MPa, volume space velocity 1.6h -1 , The reaction temperature is 278°C. The total hydrogen to oil volume ratio is 400:1. The properties of raw oil and test results are listed in Table 4.

[0036] It can be seen from Table 4 that this technology can effectively remove heteroatoms such as sulfur and nitrogen, and the product can meet the index requirements.

[0037] Table 4 Raw oil properties and test results

[0038]

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Abstract

The invention relates to a method for hydrotreatment of heavy fraction of pyrolysis gasoline, which adopts the one-section series process flow, and particularly comprises the following steps that: raw materials of the heavy fraction of the pyrolysis gasoline and hydrogen gas are contacted with a first reactor hydrogenation catalyst first under the condition of hydrofining, and the W-Mo-Ni based hydrogenation catalyst with high content of active metal is used in the first reactor; and the product flowed out of the first reactor directly enters a second reactor to be contacted with two hydrogenation catalysts in the second reactor, the reaction materials are contacted with the W-Mo-Ni based hydrogenation catalyst first and then the Mo-Co based hydrogenation catalyst, and the reaction products are subjected to the separating treatment. Aiming at the pyrolysis gasoline C9 to C10 fractions which are difficultly treated by petrochemical enterprises, the economic benefits are improved by adopting the method; moreover, the method also has the advantages of simple process flow, stable operation and good product property, and the hydrogenation device used in the method can be newly built or improved from the old hydrogenation device.

Description

technical field [0001] The invention relates to a hydrogenation treatment method for the heavy fraction of pyrolysis gasoline, specifically a method for hydrogenating the heavy fraction of pyrolysis gasoline as a raw material to produce high value-added products, which is suitable for use by petrochemical enterprises with cracking devices. Background technique [0002] Pyrolysis gasoline heavy fraction generally refers to C 9 ~C 10 Distillates, due to poor product properties, have not been fully utilized by most companies, and are generally only sold as fuel oil or cheap products. With the insufficient supply of crude oil resources and the continuous increase of the heavy fraction of pyrolysis gasoline caused by the increase in the output of ethylene units, whether this part of resources can be fully utilized will play an increasingly important role in the growth of corporate profits. [0003] In prior art, to pyrolysis gasoline C 6 ~C 8 The treatment technology of disti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04
Inventor 徐大海李扬王震牛世坤佟德群
Owner CHINA PETROLEUM & CHEM CORP
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