Method for refining enhanced oil product solvent

A solvent refining and solvent technology, applied in the direction of refining with two or more solvents, refining hydrocarbon oil, petroleum industry, etc., can solve the problems of small improvement and no obvious effect of reduction.

Inactive Publication Date: 2012-07-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some researchers use the method of extracting liquid external circulation to increase the yield of refined oil, but the increase is very small, about 1-2%, and has no obvious effect on the reduction of saturated hydrocarbons in the extracted oil

Method used

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  • Method for refining enhanced oil product solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The second-line distillate produced by a refinery is refined with furfural as a solvent. The refining process is carried out in a packed extraction tower with a height of 3000mm and an inner diameter of 30mm. The top of the tower is the outlet of the refined liquid, and the bottom of the tower is the discharge of the extracted liquid 300mm from the top of the tower is the inlet of furfural, 400mm from the bottom of the tower is the inlet of enhanced extractant, and 1000mm from the bottom of the tower is the inlet of raw material oil. The interface with the oil, the refined liquid and the extracted liquid are evaporated to recover the solvent to obtain the refined oil and the extracted oil. Control tower top temperature 100 ℃, tower bottom temperature 70 ℃, the agent oil mass ratio of furfural and raw oil is 2: 1, the yield of refined oil is 65%, viscosity index is 86, and saturated hydrocarbon content in the extracted oil is 32%; The enhanced extraction process provided...

Embodiment 2

[0013] The content of saturated hydrocarbons in the catalytic cracking oil slurry produced by a refinery is 31%. Using the refining equipment in Example 1, the temperature at the top of the tower is 70°C, the temperature at the bottom of the tower is 50°C, and the mass ratio of agent to oil is 1:1. After being refined with a solvent, the yield of its refined oil is 20%, of which the saturated hydrocarbon content is 81.0%, and the saturated hydrocarbon content in the extracted oil is 15.1%; the enhanced extraction process is adopted, and the mixed alkanes of C7-C12 are used as the enhanced solvent. The amount accounts for 20% of the raw oil, and other conditions remain unchanged, the yield of refined oil reaches 35%, of which the saturated hydrocarbon content is 81.5%, and the saturated hydrocarbon content in the extracted oil is reduced to 5.5%. The yield of refined oil reaches 38%, wherein the saturated hydrocarbon content is 80.7%, and the saturated hydrocarbon content in the...

Embodiment 3

[0015] The content of saturated hydrocarbons in the catalytic cracking oil slurry produced by a refinery is 31%. Using the refining equipment in Example 1, the temperature at the top of the tower is 70°C, the temperature at the bottom of the tower is 50°C, and the mass ratio of agent to oil is 1:1. After being refined by solvent, the yield of its refined oil is 21%, wherein the content of saturated hydrocarbon is 80.2%, and the content of saturated hydrocarbon in the extracted oil is 17.2%; the enhanced extraction process is adopted, and the mixed alkanes of C7-C12 are used as the enhanced solvent, and the The amount accounts for 20% of the raw oil, and other conditions remain unchanged. The yield of refined oil reaches 36.1%, of which the saturated hydrocarbon content is 81.3%, and the saturated hydrocarbon content in the extracted oil is reduced to 5.2%. The yield of refined oil reaches 38%, wherein the saturated hydrocarbon content is 80.1%, and the saturated hydrocarbon con...

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Abstract

The invention discloses a method for refining enhanced oil product solvent, which aims at separating saturated hydrocarbon and aromatic hydrocarbon with less rings and long side chains in raw oil to refined oil as much as possible, so that the yield and the quality of the refined oil can be improved. The method is characterized in that furaldehyde, N-methyl pyrrolidone, phenol or dimethyl sulfoxide is taken as an extracting solvent, C7-C12 alkane is taken as an enhancing solvent, the extraction process is carried out in an extraction tower, the extracting solvent enters from the upper part of the solvent extraction tower, raw oil enters from the middle-lower part of the extraction tower, and the enhancing solvent enters from the lower part of the extraction tower; refined liquid comes out from the top of the extraction tower, and the refined oil, the extracting solvent and the enhancing solvent are obtained by evaporating and recovering the solvent; extraction liquid comes from the bottom of the extraction tower, and extracted oil, the extracting solvent and the enhancing solvent are obtained by evaporating and recovering the solvent; and the extracting solvent and the enhancing solvent can be recycled after being separated.

Description

technical field [0001] The invention belongs to the field of petroleum and petroleum fraction refining, and relates to a method for refining oil products in the petroleum processing process. The International Patent Classification belongs to C10G 21 / 00. Background technique [0002] In the process of petroleum processing, solvent extraction (also called extraction in industry) is often used to refine petroleum products. For example, the solvent refining of lubricating oil uses furfural, N-methylpyrrolidone (NMP for short) or phenol as the extraction solvent for refining. Lubricating oil, using solvents to selectively dissolve non-ideal components of lubricating oil such as polycyclic aromatic hydrocarbons and colloids in distillate oil, and separate ideal components of lubricating oil from non-ideal components; some studies have shown that using furfural, NMP , phenol or dimethyl sulfoxide (DMF for short) can also be used to refine the catalytic cracking oil slurry, separat...

Claims

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Application Information

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IPC IPC(8): C10G21/00C10G21/02C10G21/27C10G21/28
Inventor 王延臻赵浩浩李宁韩晓彤徐鸿宋春敏段红玲崔久涛董艳丽
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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