A kind of method for separating gasoline fraction and gasoline desulfurization method

A gasoline fraction and fraction technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, hydrocarbon oil treatment products, etc., can solve problems such as loss of octane number, difficulty in obtaining gasoline products, and incomplete separation of olefins.

Active Publication Date: 2020-04-21
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the incomplete separation of olefins, there is still a partial loss of octane number, and the sulfur content of mixed gasoline after the light and heavy fractions are treated separately is greater than 10ppm
[0008] It can be seen that, if desulfurization treatment is carried out according to the composition difference of different fractions, some olefins will still be hydrogenated and saturated, so the loss of octane number is unavoidable, and may even affect the desulfurization effect, so that the final gasoline product It is difficult to meet the requirements of the National VI gasoline standard

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method for separating gasoline fraction and gasoline desulfurization method
  • A kind of method for separating gasoline fraction and gasoline desulfurization method
  • A kind of method for separating gasoline fraction and gasoline desulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] use image 3 The separation device shown and the above-mentioned process flow are used to separate the full-fraction FCC gasoline from Daqing. The composition and physical properties of this raw material are shown in Table 1.

[0102] The raw material enters from the lower part of the extraction section 1, and the extraction solvent (92v% sulfolane, 7v% tetraethylene glycol, 1v% water) enters from the upper part of the extraction section 1.

[0103] The solvent-poor raffinate obtained from the top of the extraction section 1 enters the solvent removal tower 3 for water washing, and the amount of washing water is about 4 times the mass flow rate of the poor-solvent raffinate oil, and the obtained raffinate is discharged from the top of the solvent removal tower 3 .

[0104] The solvent-rich extraction oil obtained at the bottom of the extraction section 1 enters the olefin recovery column 4 from the stripping section 2 . The olefin-rich fraction is obtained at the top...

Embodiment 2

[0117] use image 3 The separation device shown and the above process flow are used to separate the distillates from Jingbo FCC gasoline. The composition and physical properties of the raw material are shown in Table 4, the control of specific process conditions is shown in Table 5, and the composition of raffinate oil, extracted oil and light olefin fraction is shown in Table 6.

[0118] Table 4 Composition of Distillate Raw Materials in FCC Gasoline

[0119]

[0120] Table 5 Process condition parameters of each equipment

[0121]

[0122]

[0123] Table 6 The composition of the properties of the three streams

[0124]

[0125] It can be seen from Table 6 that by using the separation method in this example, the FCC gasoline fraction with an end boiling point not higher than 130°C can be separated into raffinate, extracted oil and light olefin fraction, which have significant hydrocarbon composition differences. part. After calculation, the sum of the olefin co...

Embodiment 3

[0128] With Prime-G + technology, the extracted oil obtained in Example 2 is subjected to selective hydrodesulfurization to obtain desulfurized oil, wherein the reaction pressure is 2.3MPa, the hydrogen-oil volume ratio is 9.6, and the space velocity is 4.9 / h -1 , the reaction temperature is 250°C;

[0129] The raffinate oil in Example 2 was mixed with the above-mentioned desulfurized oil to obtain a mixed oil.

[0130] Among them, the specific composition and physical properties of the gasoline fraction in Example 2 (from Chambord FCC gasoline), and the specific composition and physical properties of the mixed oil can be found in Table 7.

[0131] It can be seen from Table 7 that the olefin content in the mixed oil is significantly lower than that in the gasoline fraction, but the octane number is slightly increased.

[0132] By mixing the mixed oil with blended gasoline such as isomerized gasoline and aromatic gasoline, gasoline products with an olefin content of less than...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for separating gasoline fraction and gasoline desulphurization. The method comprises the following steps: respectively using a gasoline fraction and an extraction solvent for penetration into an extraction segment from a lower middle part and an upper part, performing counter current contact, removing an extraction solvent for a lean solvent raffinate oil to obtainraffinate oil, performing back-extraction processing on the solvent-rich raffinate oil, returning the lean solvent soil to an extraction segment, introducing the solvent-rich soil into an alkene recovery tower from the bottom of a back-extraction segment, performing fractional distillation, returning an alkene-rich fraction part flowed out from the top of the alkene recovery tower to the back-extraction segment from the bottom, realizing circulation, leading a part of the material as an alkene fraction, and performing solvent separating extraction on a sulfur-rich fraction flowed from the bottom of the alkene recovery tower to obtain the extraction oil. The provided separating method can realize effective separating for the alkene in a gasoline fraction, is benefit for reducing the alkenecontent in a gasoline product, can guarantee no influence for octane number, realizes deep desulphurization, realizes structural adjusting of a gasoline product, and can obtain the high-quality gasoline.

Description

technical field [0001] The invention relates to a method for separating gasoline fractions and a gasoline desulfurization method, belonging to the technical field of gasoline processing and refining. Background technique [0002] Proven oil resources around the world are becoming increasingly heavy, and the production of clean oil products is becoming more and more difficult. With the increasing impact of vehicle exhaust emissions on the atmospheric environment, countries around the world have increasingly stringent requirements on the quality of gasoline for vehicles. . From January 1, 2019, my country plans to implement the National VI motor gasoline standard, which requires that the sulfur content of gasoline is less than 10ppm, the olefin content is less than 15v%, and the octane number is not reduced. Therefore, reducing the sulfur content and olefin content of motor gasoline at the same time without reducing the octane content is the most important task at present. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/16
CPCC10G67/16C10G2300/202C10G2300/305C10G2400/02
Inventor 赵亮高金森郝天臻张宇豪陈丰王永涛王晓琴曹丽媛徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap