Method for separating saturated hydrocarbons and aromatic hydrocarbons from lightweight cycle oil

A technology for light cycle oil and aromatics, applied in the preparation of test samples, weighing by removing certain components, etc., can solve problems such as distortion of saturated hydrocarbons and aromatics analysis results, and achieve good technical effects

Active Publication Date: 2012-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem of distorted analysis results of saturated hydrocarbons and aromatics in light cycle oil wit

Method used

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  • Method for separating saturated hydrocarbons and aromatic hydrocarbons from lightweight cycle oil
  • Method for separating saturated hydrocarbons and aromatic hydrocarbons from lightweight cycle oil
  • Method for separating saturated hydrocarbons and aromatic hydrocarbons from lightweight cycle oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The accuracy of the method for separating saturated hydrocarbons and aromatics in samples with high aromatics content was investigated.

[0023] A solid phase extraction column with a column height of 60 mm and an internal diameter of 70 mm is packed with 1.0 g of active silica, whose particle size is 100)200 mesh. 1.0 g of active neutral alumina is packed in a solid-phase extraction column with a column height of 60 mm and an internal diameter of 7.0 mm, and its particle size is 100)200 mesh. Two solid-phase extraction columns are connected together with a column joint, the silica column is located at the upper part, and the alumina column is located at the lower part.

[0024] According to the method of ASTM D2549, the saturated hydrocarbons and aromatics of diesel oil samples were separated, and after constant weight weighing, four samples with different contents of saturated hydrocarbons and aromatics were prepared. According to the method described in claim 1, fou...

Embodiment 2

[0029] The accuracy of the method for separating saturated hydrocarbons and aromatics in samples with high aromatics content was investigated.

[0030] A solid phase extraction column with a column height of 60 mm and an internal diameter of 70 mm is packed with 1.0 g of active silica, whose particle size is 100)200 mesh. 1.0 g of active neutral alumina is packed in a solid-phase extraction column with a column height of 60 mm and an internal diameter of 7.0 mm, and its particle size is 100)200 mesh. Two solid-phase extraction columns are connected together with a column joint, the silica column is located at the upper part, and the alumina column is located at the lower part.

[0031] According to the method of ASTM D2549, the saturated hydrocarbons and aromatics of diesel oil samples were separated, and after constant weight weighing, four samples with different contents of saturated hydrocarbons and aromatics were prepared. According to the method described in claim 1, fou...

Embodiment 3

[0036]The accuracy of the method for separating saturated hydrocarbons and aromatics in samples with high aromatics content was investigated.

[0037] Pack 1.0 g of activated silica in a solid-phase extraction column with a column height of 60 mm and an internal diameter of 7.0 mm, and its particle size is 100)200 mesh. 1.0 g of active neutral alumina is packed in a solid-phase extraction column with a column height of 60 mm and an internal diameter of 70 mm, and its particle size is 100)200 mesh. Two solid-phase extraction columns are connected together with a column joint, the silica column is located at the upper part, and the alumina column is located at the lower part.

[0038] According to the method of ASTM D2549, the saturated hydrocarbons and aromatics of diesel oil samples were separated, and after constant weight weighing, four samples with different contents of saturated hydrocarbons and aromatics were prepared. According to the described method of claim 1, four s...

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Abstract

The invention relates to a method for separating saturated hydrocarbons and aromatic hydrocarbons from lightweight cycle oil to mainly solve a problem of analytic result distortion of the saturated hydrocarbons and the aromatic hydrocarbons in the high-aromatic-hydrocarbon-content lightweight cycle oil in present separation technologies. The method which treats the lightweight cycle oil as an analytic material comprises the following steps: 1, adsorbing the analytic material with an adsorption column of a silica adsorbent I, flushing with an n-pentane solvent I to obtain a solution I, adsorbing through allowing the solution I to enter an adsorption column of an alumina adsorbent II, and flushing with the n-pentane solvent I to obtain a solution II; 2, flushing the adsorption column of the silica adsorbent I with a dichloromethane solvent II to obtain a solution III; 3, flushing the adsorption column II of the alumina adsorbent II with the dichloromethane solvent II to obtain a solution IV; 4, steaming the solution II to remove the n-pentane solvent I, and obtaining the content of the saturated hydrocarbons through a normalization method; and 5, steaming a mixture of the solution III and the solution IV to remove the dichloromethane solvent II, and obtaining the content of the aromatic hydrocarbons through the normalization method. The method well solves the problem through above technical scheme and can be applied to the industrial analysis of the saturated hydrocarbons and the aromatic hydrocarbons in the lightweight cycle oil.

Description

technical field [0001] The invention relates to a method for separating saturated hydrocarbons and aromatic hydrocarbons in light cycle oil. Background technique [0002] Light cycle oil, usually used as a lower quality blended diesel component, is typically blended with straight run diesel. The annual processing capacity of catalytic cracking units in my country has exceeded 68 million tons, and the annual production capacity of LCO has exceeded 10 million tons. The content of sulfur, nitrogen and aromatics in FCC light cycle oil is relatively high, and the cetane number is low, so it cannot be used as a blending component of clean diesel oil, but can only be used as a blending component of fuel oil. However, the demand for fuel oil is relatively small, and how to use catalytic light cycle oil to get the maximum benefit is a growing problem. At present, the demand for aromatics and olefins in the international market is growing even faster than gasoline and diesel. In th...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N1/34
Inventor 李诚炜张育红王川
Owner CHINA PETROLEUM & CHEM CORP
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