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Method for hydrotreating heavy distillates

A heavy distillate oil, hydrotreating technology, applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problem of inability to moderate operating conditions

Inactive Publication Date: 2011-05-04
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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  • Method for hydrotreating heavy distillates
  • Method for hydrotreating heavy distillates
  • Method for hydrotreating heavy distillates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The heavy distillate oil raw material 1 goes through the heating furnace to reach the required temperature and fully mixes and dissolves the hydrogen in the SX static mixer, and then enters the hydrogenation reactor. The reaction conditions are: hydrogen partial pressure 7.3MPa, volume space velocity 1.7h -1 , The reaction temperature is 361° C., and the volume ratio of hydrogen to oil is 420:1. The raw material oil properties and product properties are listed in Table 2.

[0028] 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

[0030] The heavy distillate oil raw material 2 is fully mixed with hydrogen and enters the hydrogenation reactor after passing through the heating furnace. The gas-liquid mixer adopts SK type static mixer. The reaction conditions are: hydrogen pressure 7.2MPa, volume space velocity 1.0h -1 , The reaction temperature is 368°C, and the volume ratio of hydrogen to oil is 480:1. The raw material oil properties and product properties are listed in Table 3.

[0031] 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

[0033] The heavy distillate oil raw material 3 is fully mixed with hydrogen and enters the hydrogenation reactor after passing through the heating furnace. The reaction conditions are: hydrogen partial pressure 6.7MPa, volume space velocity 1.4h -1 , The reaction temperature is 365°C, and the volume ratio of hydrogen to oil is 400:1. Half of the hydrogen is mixed with the raw materials through the SH-type gas-liquid mixer, and the other half is directly added to the reactor through the pipeline. The raw material oil properties and product properties are listed in Table 4.

[0034] 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 method for hydrotreating heavy distillates, which comprises the following steps of: firstly, fully mixing raw oil with hydrogen gas through a heating furnace in a gas-liquid mixer; then, contacting with a hydrotreating catalyst at a low hydrogen-oil volume ratio under mild technological conditions, and carrying out a conventional hydrorefining reaction. Compared with the conventional hydrotreating method, the invention can obtain better refining effect under the same technological conditions. The method provided by the invention aims at heavy distillates of petrochemical enterprises, such as vacuum gas oil, coke gas oil, deasphalted oil or mixture oil thereof, and the heavy distillate products produced by using the technological method can be used as high-quality raw materials of catalytic cracking units or hydrocracking units. The method provided by the invention has simple technological flow, stable operation and good product characters; and a new hydrogenation unit can be built, and the old unit can also be used through reformation.

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): C10G45/22
Inventor 徐大海李扬刘继华李士才丁贺
Owner CHINA PETROLEUM & CHEM CORP
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