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Method for removing asphalt in raw oil

A technology for raw oil and deasphalting tower, which is applied in the petroleum industry, processing hydrocarbon oil, and only multi-stage series refining process treatment, etc., can solve the problems of low processing capacity, low yield of deasphalted oil, and low separation efficiency , to achieve the effect of improving separation efficiency, rapid phase separation, and increasing separation rate

Active Publication Date: 2021-09-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some processes increase the contact between the solvent and the residual oil by adding high-efficiency separation packing in the separation tower, the separation process still relies on the natural sedimentation of the heavy components under the action of gravity, and the separation efficiency is low, which leads to low processing capacity of the device and high removal rate. Problems such as low asphalt oil yield

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  • Method for removing asphalt in raw oil
  • Method for removing asphalt in raw oil
  • Method for removing asphalt in raw oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for removing bitumen in raw oil, comprising the following steps:

[0047] (1) Mix the vacuum residue and n-pentane in a mass ratio of 1:1 to form a residue mixture;

[0048] (2) Heat the mixture to 150°C and enter the electric field treatment device from the upper part of the electric field treatment device; wherein, the electric field strength in the upper area of ​​the electric field treatment device is 10000V / cm, the middle area is 5000V / cm, and the electric field in the bottom area The strength is 0; the residence time of the residual oil mixture in the electric field treatment device is 15min.

[0049] (3) The residual oil mixture treated by the electric field treatment device enters the deasphalting tower from the middle part of the deasphalting tower for sedimentation and separation.

[0050] (4) The deasphalted oil mixture discharged from the upper part of the deasphalting tower and the deoiled bitumen mixture discharged from the bottom enter the solve...

Embodiment 2

[0053] A method for removing bitumen in raw oil, comprising the following steps:

[0054] (1) Mix the vacuum residue and n-pentane in a mass ratio of 1:1 to form a residue mixture;

[0055] (2) Heat the mixture to 150°C and enter the electric field treatment device from the upper part of the electric field treatment device; wherein, the electric field strength in the upper area of ​​the electric field treatment device is 10000V / cm, the middle area is 1000V / cm, and the electric field in the bottom area is 10000V / cm. The strength is 0; the residence time of the residual oil mixture in the electric field treatment device is 30min.

[0056] (3) The residual oil mixture treated by the electric field treatment device enters the deasphalting tower from the middle part of the deasphalting tower for sedimentation and separation.

[0057] (4) The deasphalted oil mixture discharged from the upper part of the deasphalting tower and the deoiled bitumen mixture discharged from the bottom e...

Embodiment 3

[0060] A method for removing bitumen in raw oil, comprising the following steps:

[0061] (1) Mix the vacuum residue and n-pentane in a mass ratio of 1:1 to form a residue mixture;

[0062] (2) Heat the mixture to 150°C and enter the electric field treatment device from the upper part of the electric field treatment device; wherein, the electric field strength in the upper area of ​​the electric field treatment device is 8000V / cm, the middle area is 5000V / cm, and the electric field in the bottom area The strength is 0; the residence time of the residual oil mixture in the electric field treatment device is 60min.

[0063] (3) The residual oil mixture treated by the electric field treatment device enters the deasphalting tower from the middle part of the deasphalting tower for sedimentation and separation.

[0064] (4) The deasphalted oil mixture discharged from the upper part of the deasphalting tower and the deoiled bitumen mixture discharged from the bottom enter the solven...

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Abstract

The invention discloses a method for removing asphalt in raw oil, which comprises the following steps of: treating a mixture formed by mixing the raw oil and a solvent through an electric field treatment device to quickly coalesce and grow colloid and asphaltene in the raw oil, feeding the mixture passing through the electric field treatment device from the middle part of a deasphalting tower, settling and separating in the deasphalting tower, enabling a deasphalted oil mixture from the upper part of the deasphalting tower to enter a solvent separation system to be separated to obtain deasphalted oil, and enabling a deoiled asphalt mixture from the lower part of the deasphalting tower to enter the solvent separation system to obtain deoiled asphalt. According to the invention, rapid separation, coalescence and growth of asphaltene in the raw oil are realized by adopting an electric field treatment technology, and the separation efficiency and the treatment capacity of the device are improved while the deasphalting requirement of the raw oil is met.

Description

technical field [0001] The invention relates to the field of petrochemical technology, in particular to a method for removing bitumen from raw oil. Background technique [0002] As the quality of crude oil continues to become heavy and inferior and the quality standards of light oil are becoming increasingly stringent, the deep processing technology and capacity of heavy oil, especially residual oil, has become one of the main factors affecting the profitability of refineries, and has also become a hot spot and focus of refining technology development. focus. [0003] The application of the solvent deasphalting process (SDA) can basically separate the vacuum residue, the saturates in the catalytic slurry, and the single-ring aromatics from the colloids and asphaltenes, laying the foundation for the efficient utilization of inferior components. The deasphalted oil rich in saturates and single-ring aromatics obtained by the SDA process can be used as feedstock for catalytic c...

Claims

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Application Information

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IPC IPC(8): C10G53/04
CPCC10G53/04C10G2300/206
Inventor 崔新安王雪蒋兴家王洪彬李春贤施振东
Owner CHINA PETROLEUM & CHEM CORP