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Coal liquefied oil boiling bed hydrogenation technique

A technology for coal liquefied oil and hydrogenation treatment, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment. It can solve the problems of difficult removal of aromatics and difficulty in hydrogenation saturation of aromatics, and it is easier to control the reaction temperature , Reduce the content of polycyclic aromatic hydrocarbons, the effect of low investment

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of the difficulty of hydrogenation saturation, the hydrogenation of the first aromatic hydrocarbon of fused-ring aromatics is easier, followed by the hydrogenation of the two rings, but it is very difficult to hydrogenate all aromatics
That is to say, the three-ring aromatics in the raw material, that is, the aromatics with more than three rings, are easily hydrogenated and saturated into bicyclic or single-ring aromatics, but the number of total aromatics in the raw material does not decrease. Therefore, the content of polycyclic aromatics in the raw material The more, the more difficult it is to remove aromatics

Method used

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  • Coal liquefied oil boiling bed hydrogenation technique

Examples

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Comparison scheme
Effect test

Embodiment 1

[0056] Example 1 is to divide the filtered decant oil into 350°C fraction with 350°C as the cut point. Among them, the >350°C distillate and hydrogen enter the hydro-upgrading unit in reverse for hydro-upgrading. After hydro-upgrading, the clarified oil, <350°C light fraction and coal liquefied oil (the weight ratio of oil slurry / coal liquefied oil is 1:9) is mixed with the mixing tank and then mixed with hydrogen and enters from the bottom of the reactor. When it flows upwards, it drives the catalyst in the reactor to fluidize, so that the reactor is in a fully mixed flow state. After the reacted material is separated, the catalyst is returned to the reaction zone or discharged, and part of the circulating oil (the circulating ratio is 2:1, that is, the weight ratio of the circulating liquid to the coal liquefied oil) enters the reactor to mix with the raw material to continue the reaction; Enter the hot high fraction for gas-liquid separation. The gas rich in hydrogen is re...

Embodiment 2

[0058] Example 2 is to put the filtered >350°C clarified oil fraction into the hydrogenation unit for hydrotreating, and combine the hydrogenated and upgraded clarified oil, the light fraction <350°C and the coal liquefied oil (oil slurry: coal liquefaction The oil weight ratio is 1:4) and mixed with hydrogen after passing through the mixing tank and enters from the bottom of the reactor. When it flows upwards, it drives the catalyst in the reactor to fluidize, so that the reactor is in a fully mixed flow state. After the reacted material is separated, the catalyst is returned to the reaction zone or discharged, and part of the circulating oil (the circulating ratio is 2:1, that is, the weight ratio of the circulating liquid to the coal liquefied oil) enters the reactor to mix with the raw material to continue the reaction; Enter the hot high fraction for gas-liquid separation. The gas rich in hydrogen is recycled after passing through the scrubber. The resulting oil separate...

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Abstract

The invention discloses a boiling bed hydrogenation technique for improving the coal liquefied oil light oil yield; catalytic cracking oil slurry clarified oil is distilled to obtian a light fraction and a heavy fraction, the heavy fraction is countercurrent mixed with hydrogen for hydro-upgrading reaction, the upgraded heavy fraction and the light fraction are mixed, and enter, together with coal liquefied oil and cycled liquid production oil, into a boiling bed reactor for hydrogenation reaction; a reaction effluent is separated to obtain liquid production oil, part of the liquid production oil returns back to the boiling bed reactor, and the rest of the liquid production oil is fractionally distillated to obtain various products. After upgrading of oil slurry, the content of mononuclear aromatics and polyaromatic hydrocarbons is greatly increased, the upgraded oil slurry is used as a hydrogen donor for the coal liquefaction oil boiling bed hydrogenation process, by the synergy of the coal liquefied oil and the hydrogen donor, the coal liquefied oil conversion rate can be significantly improved, the yield of light oil can be increased, at the same time, catalytic cracking slurry oil being difficult to process can be well utilized, and the economic benefit is very good.

Description

technical field [0001] The invention relates to a fluidized bed hydrogenation process for improving the yield of light oil of coal liquefied oil, more specifically, a method for converting coal liquefied oil into light oil in the largest amount. Background technique [0002] Since coal liquefied oil contains a large amount of olefins, the nitrogen content is generally above 0.5wt%, and it also contains a large amount of oxygen. If it is not pretreated in time, it is very easy to generate substances that are not conducive to subsequent transportation and processing. Therefore, hydrogenation is used. Pretreat coal liquefied oil, saturate olefins in coal liquefied oil, remove oxygen, remove nitrogen and sulfur and other heteroatoms to the maximum extent, and improve the stability of coal liquefied oil, so this hydrogenation process is also called stable hydrogenation . [0003] Under normal circumstances, coal liquefied oil is heavy and contains more mechanical impurities, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 吕振辉彭绍忠王刚袁胜华
Owner CHINA PETROLEUM & CHEM CORP
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