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A kind of method for extracting and separating atmospheric pressure heavy oil vacuum residue

A technology for atmospheric pressure heavy oil and vacuum residue oil, which is applied in the treatment of hydrocarbon oil, petroleum industry, refined hydrocarbon oil, etc. High degree of removal, cheap and environmentally friendly solvent, effect of improving extraction rate and degree of purification

Active Publication Date: 2019-04-16
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product obtained by this method is only ordinary road asphalt, the added value of the product is low, and the quality of the obtained heavy deasphalted oil is poor
[0006] CN1315490A discloses a method for producing needle-shaped petroleum coke from heavy oil at atmospheric pressure. The heavy oil at atmospheric pressure and the circulating oil in the coking process are subjected to mild heat treatment together, and then enter the delayed coking unit for liquid phase reaction at low temperature and long residence time to produce Needle coke that meets the specifications is produced, and the yield of needle coke obtained by this method is low and takes a long time
This method is not thorough enough for separation, and the deasphalted oil still contains a large amount of polycyclic aromatic hydrocarbons, which are prone to coke
Asphaltene contains a large amount of colloid, which is directly used to blend and produce road asphalt, with low added value

Method used

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  • A kind of method for extracting and separating atmospheric pressure heavy oil vacuum residue
  • A kind of method for extracting and separating atmospheric pressure heavy oil vacuum residue
  • A kind of method for extracting and separating atmospheric pressure heavy oil vacuum residue

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Embodiment 1

[0037] This embodiment provides a method for extracting and separating heavy oil, which is carried out by using an extraction tower. The specific process is as follows figure 1 shown. The method includes the following steps:

[0038] Use dimethyl sulfoxide as solvent 1, let it enter the upper part of the extraction tower, the viscosity reducer enters the middle part of the extraction tower, heavy oil 1 enters the lower part of the extraction tower, the solvent-oil mass ratio is 3:1, the temperature is 70 °C, the pressure 1 MPa, heavy oil 1, polar solvent 1, and viscosity reducer are in countercurrent contact in the tower; the deasphalted oil phase is discharged from the top of the extraction tower, mainly containing saturated hydrocarbons and light aromatics, and enters the solvent evaporator; the bottom of the extraction tower is discharged The deoiled bituminous phase, mainly containing condensed ring aromatics, colloids and asphaltenes, enters the solvent evaporator.

[0...

Embodiment 2

[0049] This embodiment provides a method for extracting and separating heavy oil, which is carried out by using an extraction tower. The specific process is as follows figure 1 shown. The method includes the following steps:

[0050] Using sulfolane as the solvent 2, it enters the upper part of the extraction tower, the viscosity reducer enters the middle part of the extraction tower, and the heavy oil 2 enters the lower part of the extraction tower, the solvent-oil mass ratio is 3:1, the temperature is 75°C, and the pressure is 1.2MPa The heavy oil 2 is in countercurrent contact with the polar solvent 2 and the viscosity reducer in the tower; the deasphalted oil phase discharged from the top of the extraction tower mainly contains saturated hydrocarbons and light aromatics, and enters the solvent evaporator; the deoiled oil phase discharged from the bottom of the extraction tower Asphalt phase, mainly containing polycyclic aromatic hydrocarbons, colloids and asphaltenes, ent...

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Abstract

The invention provides a method for extracting and separating atmospheric heavy oil and vacuum residual oil. The method comprises the step of extracting the atmospheric heavy oil and / or the vacuum residual oil by using polar aprotic solvents, wherein a viscosity reducer is also added in the extraction process. According to the method provided by the invention, the residual oil is separated into deasphalted oil and deoiled asphalt by utilizing the difference of polarity force and hydrogen bond force and adopting the polar aprotic solvents, so that the contents of S, N and metals in the deasphalted oil are reduced to a certain extent, the technology or equipment requirements of a follow-up device are reduced, the influence of hetero-atoms and heavy metals on a catalyst is reduced, and environmental pollution is reduced; the method can be used for clearly separating the atmospheric heavy oil and the vacuum residual oil, thus improving the selectively of light and heavy components, and improving the pull-out rate of the deasphalted oil; the viscosity reducer is also added in the solvent extraction process, so that the mass transfer effect of the residual oil can be improved, and the energy consumption of equipment is reduced.

Description

technical field [0001] The invention relates to a method for extracting and separating atmospheric heavy oil and vacuum residue, belonging to the technical field of petroleum processing. Background technique [0002] Atmospheric heavy oil and vacuum residue are the bottom materials of the atmospheric and vacuum tower, with a large molecular weight, a boiling point above 350°C, a high amount of polycyclic aromatic hydrocarbons, and a colloid and asphaltene content of more than 40%. easy to decompose and condense. Due to its complex structure, it is often difficult to be effectively utilized. With the continuous development of the economy and the continuous exploitation of oil resources, resources are increasingly scarce. With the introduction of molecular refining, the effective utilization of heavy oil has become a key issue in the oil refining industry, and the effective separation of heavy oil is the prerequisite for the effective utilization of heavy oil. [0003] Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G21/06C10G21/24C10G21/22C10G21/16C10G21/28
CPCC10G21/003C10G21/06C10G21/16C10G21/22C10G21/24C10G21/28C10G2300/1077C10G2300/206C10G2300/4006C10G2300/4012
Inventor 刘艳升曹睿伍洛刘拥军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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