Method of extracting and separating crude oil

A technology for extraction and crude oil, which is applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problems of inconspicuous separation effect and incomplete removal of metal components, so as to reduce operating costs and equipment costs, and reduce processing costs. The effect of pressure, prolonging the service life
CN106833719AInactive Publication Date: 2017-06-13CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Publication Date
2017-06-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method of extracting and separating crude oil. The method comprises the step of extracting the crude oil by adopting a selective solvent, wherein the selective solvent comprises a polar non-proton solvent. According to a polarity effect and hydrogen-bond interaction, the crude oil is divided into polar and nonpolar two components. During solvent separation, an inorganic salt component in the crude oil is enriched, and corrosion of Cl to equipment is reduced. A demulsifier can be added into the solvent extraction process so that moisture in the crude oil can be removed through the solvent better. While the crude oil is separated, the content of S, N and metal in a light component can be reduced at the same time, and the processing pressure of subsequent devices is reduced. According to the method of extracting and separating the crude oil, not only is energy consumption far lower than that of distillation, but also coking, polymerization or dissociation of heavy distillates of petroleum in the process can be avoided, a high-vacuum apparatus during reduced pressure distillation is not needed either, and the operation cost and equipment cost are remarkably reduced.
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Description

technical field

[0001] The invention relates to a method for extracting and separating crude oil, belonging to the technical field of petroleum processing. Background technique

[0002] Inferiority and heavyness of crude oil have become the development trend in recent years, and most of the crude oil imported by my country is heavy oil with poor quality. In order to make better use of petroleum resources, it is very necessary to lighten heavy oil.

[0003] To realize the lightening of crude oil, the separation of light and heavy components of crude oil should be realized first. The traditional method of processing crude oil is to cut crude oil fractions by atmospheric and vacuum distillation. However, since distillation is separated according to different boiling points, there are heavy components in each side stream. These heavy components include polycyclic aromatic hydrocarbons, colloids, and asphaltenes, which are easily adsorbed on the surface of the catalyst, causing...

Claims

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