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Method for Reducing Olefin Content in Crude Gasoline

A technology of olefin content and gasoline, which is applied in the field of reducing olefin content in crude gasoline, can solve the problems of reducing olefin content, large differences in solvent systems, and no teaching, etc., and achieve the effect of reducing olefin content and realizing effective utilization

Active Publication Date: 2020-10-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] It can be seen from the above patent documents 1-5 that although maleic anhydride can be copolymerized with various olefins, including dienes and styrene; However, in these copolymerization systems, the solvent systems suitable for the precipitation of the respective obtained copolymers during the copolymerization process are quite different.
In addition, these patent documents only focus on obtaining specific copolymers, and do not pay attention to the changing characteristics of the liquid phase system, nor do they teach whether this polymerization method can be used to reduce the olefin content of various crude gasolines

Method used

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  • Method for Reducing Olefin Content in Crude Gasoline
  • Method for Reducing Olefin Content in Crude Gasoline
  • Method for Reducing Olefin Content in Crude Gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Add 1.0g of maleic anhydride and 0.09g of AIBN as shown in the formula in Table 1 to the pre-ether gasoline; make the above-mentioned monomer maleic anhydride and the olefin in the pre-ether gasoline carry out copolymerization at 70°C for 10 hours, with the reaction progressing , a precipitate of a polymer product is produced in the system; the precipitate is separated by filtration, and the crude gasoline after the olefin reduction treatment can be obtained.

[0085] In order to evaluate the reduction degree of olefin content, the precipitate was alternately washed with toluene and petroleum ether to remove unreacted maleic anhydride and impurities, and the obtained polymer product was vacuum-dried to constant weight.

Embodiment 2

[0087] Add 1.5g of maleic anhydride, 0.105g of BPO, and 12g of xylene as shown in the formula in Table 1 to gasoline before ether; make the above-mentioned monomer maleic anhydride and olefins in gasoline before ether self-stabilize at 70°C Precipitation polymerization, reaction for 10 hours, as the reaction progresses, a precipitate of the polymer product is produced in the system; the precipitate is separated by filtration, and the filtrate is further fractionated, and the fraction before 80°C is collected to obtain the olefin-reduced crude gasoline.

[0088] In order to evaluate the reduction degree of olefin content, the precipitate was alternately washed with toluene and petroleum ether to remove unreacted maleic anhydride and impurities, and the obtained polymer product was vacuum-dried to constant weight.

Embodiment 3

[0090] Add 2g of maleic anhydride, 0.2g of ABVN and 20g of toluene as shown in the formula in Table 1 to gasoline before ether; make the above-mentioned monomer maleic anhydride and olefins in gasoline before ether undergo self-stable precipitation polymerization at 50°C, After 20 hours of reaction, as the reaction proceeds, a precipitate of a polymer product is produced in the system; the precipitate is separated by filtration, the filtrate is further fractionated, and the fraction before 80°C is collected to obtain crude gasoline after olefin reduction treatment .

[0091] In order to evaluate the reduction degree of olefin content, the precipitate was alternately washed with toluene and petroleum ether to remove unreacted maleic anhydride and impurities, and the obtained polymer product was vacuum-dried to constant weight.

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Abstract

The invention relates to a method for reducing the content of olefin in crude gasoline. The method comprises the following steps: a) putting a copolymerization monomer, an initiator and an optional solvent into crude gasoline, wherein the difference of the boiling point of the solvent and the boiling point of the crude gasoline is 30 DEG C or greater; b) performing polymerization on the copolymerization monomer with olefin in the crude gasoline so as to generate precipitate as a polymerization product; and c) separating the precipitate. By adopting the method, the content of olefin in the crude gasoline can be effectively reduced, meanwhile, a maleic anhydride-olefin polymer can be prepared, and thus effective utilization of resources and emission control on pollutants in the field of gasoline can be simultaneously achieved.

Description

technical field [0001] The invention relates to a method for reducing the olefin content in crude gasoline, in particular to a method for reducing the olefin content in crude gasoline by means of polymerization. Background technique [0002] As people pay more and more attention to the living environment, the effective use of resources and the emission control of pollutants have become two major concerns. Therefore, countries all over the world have higher and higher requirements on the quantity and quality of petroleum products, especially strict restrictions on the emissions of automobiles and other internal combustion engines. [0003] Due to differences in raw materials and refining processes, the volume fraction of olefins in motor gasoline in my country can generally reach more than 25%. Olefins are unsaturated hydrocarbons with active chemical properties, such as diolefins and cyclodiolefins with two double bonds, which have poor oxidation stability. During the work...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02
CPCC10G53/02C10G2400/02
Inventor 杨万泰陈慧彬高易蒋汶杏曲家利陈冬
Owner BEIJING UNIV OF CHEM TECH
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