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System and method for separating oil product by using deep eutectic solvent

A deep eutectic solvent and oil technology, applied in hydrocarbon oil treatment products, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of continuous and stable operation of polycyclic aromatic hydrocarbons, solvent-free regeneration system, high energy consumption, etc.

Active Publication Date: 2021-04-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the separation effect of PAHs is not clear
In addition, the deep eutectic solvent is used as the extractant to operate in the batch distillation column, which cannot be operated continuously, and there is no solvent regeneration system
[0005] In the current literature, there are few relevant reports on the simultaneous separation of non-aromatic, monocyclic aromatic hydrocarbons and polycyclic aromatic hydrocarbons in oil products, especially the separation of polycyclic aromatic hydrocarbons and monocyclic aromatic hydrocarbons, most of which rely on rectification and other methods , high energy consumption and low efficiency
At the same time, polycyclic aromatic hydrocarbons are likely to continue to undergo side reactions such as condensation at this heating temperature, making the quality of polycyclic aromatic hydrocarbons worse
Therefore, direct distillation or rectification cannot meet the continuous and stable operation of polycyclic aromatic hydrocarbons.

Method used

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  • System and method for separating oil product by using deep eutectic solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Build the system of described deep eutectic solvent separation oil product, specifically as follows:

[0064] The system of the described deep eutectic solvent separation oil product comprises the following units: non-aromatic removal tower A, aromatics separation tower B, single-ring aromatics separation tower C, polycyclic aromatics separation tower D, deep eutectic solvent regeneration tower E and low eutectic solvent separation tower Eutectic solvent regeneration tower F; each unit is built according to the following connection relationship:

[0065] Wherein, the outlet of the non-aromatic separation tower A is connected to the bottom of the aromatics separation tower B through the pipeline 4 and the inlet, and the top of the aromatics separation tower B is connected to the bottom of the single-ring aromatics separation tower C through the pipeline 5. an entrance;

[0066] The single-ring aromatics separation tower C-bottom outlet is connected to the polycyclic aro...

Embodiment 2

[0084] The same system as in Example 1 was used.

[0085] Carrying out the method for deep eutectic solvent separation oil product can specifically comprise the following steps:

[0086] The raw material is hydrocracking of catalytic diesel from a refinery, and the analysis results show that the mass composition of the catalytic diesel hydrocracking oil is 44% of non-aromatics, 41% of single-ring aromatics, and 15% of polycyclic aromatics. The separation process is as follows:

[0087] i) The raw oil product is introduced into the non-aromatic removal tower A through the pipeline 2, and the deep eutectic solvent X is introduced into the tower A through the pipeline 1, and the two carry out a liquid-liquid extraction process of reverse contact in the tower A, and the non-aromatics are extracted from The overhead line 3 is taken out, and the mixture of the remaining mixed aromatics and the deep eutectic solvent X flows through the pipeline 4 and enters the aromatics separation ...

Embodiment 3

[0099] The same system as in Example 1 was used.

[0100] Carrying out the method for deep eutectic solvent separation oil product can specifically comprise the following steps:

[0101] After hydrocracking of heavy diesel oil from a refinery as raw material, the analysis results show that the mass composition of diesel hydrocracked oil with this catalyst is 35% of non-aromatics, 38% of single-ring aromatics, and 27% of polycyclic aromatics. The separation process is as follows:

[0102] i) The raw oil product is introduced into the non-aromatic removal tower A through the pipeline 2, and the deep eutectic solvent X is introduced into the tower A through the pipeline 1, and the two carry out a liquid-liquid extraction process of reverse contact in the tower A, and the non-aromatics are extracted from The overhead line 3 is taken out, and the mixture of the remaining mixed aromatics and the deep eutectic solvent X flows through the line 4 and enters the aromatics separation to...

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Abstract

The invention relates to a system and a method for separating an oil product by using a deep eutectic solvent in the field of separation of polycyclic aromatic hydrocarbons in petroleum or petroleum fractions. The system for separating the oil product by the deep eutectic solvent comprises the following units: a non-aromatic removal tower A, an aromatic hydrocarbon separation tower B, a monocyclic aromatic hydrocarbon separation tower C and a polycyclic aromatic hydrocarbon separation tower D; the system can separate an oil product into three major components, namely non-aromatic hydrocarbon, monocyclic aromatic hydrocarbon and polycyclic aromatic hydrocarbon. Moreover, the system can also comprise a regeneration tower E and a regeneration tower F of the deep eutectic solvent of the extraction agent, and continuous separation and regeneration of the extraction agent can also be realized.

Description

technical field [0001] The invention relates to the field of separation of polycyclic aromatic hydrocarbons in petroleum or petroleum fractions, and furthermore, relates to a system and method for separating oil products with a deep eutectic solvent. Background technique [0002] Oil products such as coking gasoline and diesel, catalytic diesel and heavy diesel are of poor quality and require further conversion before they can be used. Due to the complex components, the above oil products are directly sent to the reactor for conversion, and the conversion target is not strong, which is easy to cause excessive conversion and excessive hydrogen consumption. At the same time, the conversion difficulty of each component in the oil product is different, which may easily cause excessive cracking of light hydrocarbons, and the conversion of single-ring aromatic hydrocarbons to polycyclic aromatic hydrocarbons, and the resource utilization rate is not high. Due to the wide distribu...

Claims

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Application Information

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IPC IPC(8): C10G21/16
CPCC10G21/16C10G2400/30C10G2300/1044C10G2300/1055C10G2300/1059
Inventor 宋奇郑均林王宗霜姜向东
Owner CHINA PETROLEUM & CHEM CORP
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