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Hydrotreatment method of heavy distillate oil

A technology for hydrotreating and heavy distillate oil, which is applied in hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., and can solve problems such as inability to ease operating conditions

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operating conditions in this method are basically the same as the conventional method, and the operating conditions cannot be eased.

Method used

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  • Hydrotreatment method of heavy distillate oil
  • Hydrotreatment method of heavy distillate oil
  • Hydrotreatment method of heavy distillate oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Heavy distillate oil raw material 1 goes through the heating furnace to reach the required temperature and fully mixes and dissolves hydrogen in the gas-liquid mixer, then enters the first hydrogenation reactor. The reaction conditions are: hydrogen partial pressure 7.3MPa, reaction temperature 358°C, hydrogen oil The volume ratio is 420:1. The effluent enters the second hydrogenation reactor after passing through the gas stripping hydrogen mixer. The reaction conditions are: hydrogen partial pressure 7.1MPa, reaction temperature 360°C, hydrogen-oil volume ratio 400:1. Total volumetric space velocity 1.7h -1 . The raw material oil properties and product properties are listed in Table 2.

[0031] It can be seen from Table 2 that the impurity content in heavy distillate oil can be significantly reduced by using this technology.

Embodiment 2

[0033] The heavy distillate oil raw material 2 goes through the heating furnace to reach the required temperature and fully mixes and dissolves the hydrogen in the gas-liquid mixer before entering the first hydrogenation reactor. The reaction conditions are: hydrogen partial pressure 7.2MPa, reaction temperature 366°C, hydrogen oil The volume ratio is 480:1. The effluent enters the second hydrogenation reactor after passing through the gas stripping hydrogen mixer. The reaction conditions are: hydrogen partial pressure 7.0MPa, reaction temperature 367°C, hydrogen-oil volume ratio 430:1. Total volumetric space velocity 1.2h -1 . The raw material oil properties and product properties are listed in Table 3.

[0034] It can be seen from Table 3 that the impurity content in heavy distillate oil can be significantly reduced by using this technology.

Embodiment 3

[0036] The heavy distillate oil raw material 3 goes through the heating furnace to reach the required temperature and fully mixes and dissolves with hydrogen in the gas-liquid mixer, and then enters the first hydrogenation reactor. The reaction conditions are: hydrogen partial pressure 6.7MPa, reaction temperature 367℃, hydrogen oil The volume ratio is 500:1. The effluent enters the second hydrogenation reactor after passing through the gas stripping hydrogen mixer. The reaction conditions are: hydrogen partial pressure 6.5MPa, reaction temperature 367°C, hydrogen-oil volume ratio 520:1. Total volumetric space velocity 1.6h -1 . The raw material oil properties and product properties are listed in Table 4.

[0037] It can be seen from Table 4 that the impurity content in heavy distillate oil can be significantly reduced by using this technology.

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Abstract

The invention relates to a hydrotreatment method of heavy distillate oil. According to the invention, raw oil and hydrogen are directly delivered into a first reactor through a heating furnace; the mixture contacts a Mo-Ni series catalyst under a hydrorefining condition, such that a common hydrorefining reaction is carried out; an obtained reaction effluent is delivered into a gas stripping and hydrogen mixing apparatus, hydrogen sulfide and ammonia dissolved in the oil are removed, and hydrogen reaches a dissolved and saturated state in the oil; the oil is mixed with supplemental hydrogen, and the mixture is delivered into a second reactor; and the mixture contacts a Mo-Ni series catalyst. The method is provided aiming at heavy distillate oil of petrochemical enterprises, such as vacuum gas oil, coked gas oil, de-asphalted oil, or a mixture thereof. With the method, the produced heavy distillate oil product can be used as a high-quality raw material in a catalytic cracking apparatus or a hydrocracking apparatus. The method provided by the invention is advantaged in simple process flow, stable operation, and good product property. According to the invention, the hydrogenation apparatus can be a newly constructed apparatus or a modified old apparatus.

Description

technical field [0001] The invention relates to a method for hydrotreating heavy distillate oil. Background technique [0002] Heavy distillates are generally referred to as vacuum distillates (VGO), coker heavy distillates (CGO) or deasphalted oils (DAO). Due to the heavy distillation range, it contains more impurities such as sulfur, nitrogen and heavy metals. When used as raw material for downstream catalytic cracking or hydrocracking, it will have adverse effects on the performance of the catalyst, and even affect the stable operation of the device in severe cases. The resulting oil after hydrotreatment of heavy distillate oil has the characteristics of low content of impurities such as sulfur and nitrogen, and can be used as raw material for downstream catalytic cracking units or hydrocracking units. [0003] With the heavy and inferior quality of crude oil, the content of impurities such as sulfur and nitrogen in heavy distillates is getting higher and higher, which ...

Claims

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Application Information

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IPC IPC(8): C10G65/04
Inventor 徐大海李扬刘继华丁贺牛世坤李士才
Owner CHINA PETROLEUM & CHEM CORP
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