Method for extracting and separating aromatic hydrocarbon and saturated hydrocarbon in catalytic cracking slurry oil

A technology for catalytic cracking of oil slurry and aromatic hydrocarbons is applied in the direction of multi-stage series-connected refining process treatment, etc., and can solve the problems of increasing the scale and processing capacity of the extraction device, adding a large amount of the second solvent, and increasing the cost input, etc. To achieve the effect of reducing processing capacity and operation difficulty, reducing consumption and saving costs
CN102453503AActive Publication Date: 2012-05-16CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2012-05-16

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Abstract

A method for extracting and separating aromatic hydrocarbons and saturated hydrocarbons in catalytic cracking slurry oil comprises two-stage extraction and separation of aromatic hydrocarbons and saturated hydrocarbons in catalytic cracking slurry oil; the first-stage extraction adopts two solvents, wherein the first solvents are furfural, sulfolane, sulfoxide, N-methyl pyrrolidone or amide, and the second solvents are light oil, C6-C10 n-alkane or C6-C10 cycloalkane; before the second-stage extraction, the second solvents in raffinate oil obtained in the first-stage extraction are separated from the raffinate oil; the concentrated raffinate oil is treated by second-stage extraction by the first solvents, and the aromatic hydrocarbons and saturated hydrocarbons are further separated. The method can reduce the solvent using amount, and improve the extraction efficiency.
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Description

technical field

[0001] The invention is a method for separating hydrocarbon components, in particular, a method for separating aromatic hydrocarbons and saturated hydrocarbons from hydrocarbon components by solvent extraction. Background technique

[0002] Fluid catalytic cracking (FCC) is one of the important refining processes of heavy oil to light oil, and plays an important role in the production of light oil products such as gasoline and diesel.

[0003] With the increasing weight of catalytic cracking feed and the increase in the proportion of blended residual oil, the processing difficulty of the FCC unit is also increasing, especially the coking and fouling will affect the stable operation of the unit. In order to reduce catalyst carbon deposition, maintain the heat balance of the unit, and improve product distribution and quality, FCC units throw out part of the oil slurry to varying degrees, and the thrown out amount accounts for 5-12% by mass of the raw oil. The ...

Claims

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