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Method for removing sulfide in sulfur-containing raw oil by using ionic liquid

A technology of ionic liquid and raw oil, which is applied in the field of removing sulfide in atmospheric residual oil, marine residual fuel oil, and vacuum residual oil. It can solve the problems of high cost, low sulfide removal efficiency, and difficult adsorbent treatment, etc. problems, achieve the effect of reducing desulfurization cost, stable desulfurization treatment, and avoiding difficulties in subsequent treatment

Inactive Publication Date: 2021-02-02
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for removing sulfides in atmospheric residual oil, vacuum residual oil, and marine residual fuel oil mainly include hydrodesulfurization, adsorption desulfurization, etc., but all of them have the problem of low sulfide removal efficiency.
In addition, the use of hydrodesulfurization also has problems such as high cost of the hydrogenation process and difficulties in subsequent treatment of the adsorbent to remove sulfide. Therefore, it is necessary to develop a method that can effectively remove atmospheric residues, vacuum residues, New technology of sulfide in sulfur-containing feedstock oil such as marine residual fuel oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a method for removing sulfides in marine residual fuel oil by using ionic liquid, which specifically includes the following steps:

[0035]S1. Add marine residual fuel oil, ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, oxidant hydrogen peroxide and catalyst phosphomolybdic acid into the reactor, at 40°C, normal pressure, stirring rate of 30rpm Under full contact for 6 hours, the above-mentioned various substances are fully mixed to obtain a mixed system;

[0036] Wherein, the hydrogen peroxide used is 30% hydrogen peroxide (analytical pure AR, the same below), and the mass ratio between hydrogen peroxide and marine residual fuel oil is 1:8; 1-butyl-3-methylimidazole tetrafluoroboric acid The volume ratio between salt and marine residual fuel oil is 1:8; the mass ratio between phosphomolybdic acid and marine residual fuel oil is 1:40.

[0037] S2. Keeping the mixed system heat-preserved for about 3 hours, it can be observed that th...

Embodiment 2

[0052] This embodiment provides a method for removing sulfides in marine residual fuel oil by using ionic liquid, which specifically includes the following steps:

[0053] S1. Add marine residual fuel oil, ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, oxidant hydrogen peroxide and catalyst phosphomolybdic acid into the reactor, at 40°C, normal pressure, stirring rate of 30rpm Under full contact for 2 hours, the above-mentioned substances are fully mixed to obtain a mixed system;

[0054] Among them, the concentration of hydrogen peroxide is 30%, the mass ratio between hydrogen peroxide and marine residual fuel oil is 1:8; the volume ratio between 1-butyl-3-methylimidazolium tetrafluoroborate and marine residual fuel oil The mass ratio between phosphomolybdic acid and marine residual fuel oil is 1:40.

[0055] S2. The mixed system was kept warm for about 3 hours, and it can be observed that the mixed system is stratified, wherein the lower layer is a sulfur-rich ...

Embodiment 3

[0061] This embodiment provides a method for removing sulfides in marine residual fuel oil by using ionic liquid, which specifically includes the following steps:

[0062] S1. Add marine residual fuel oil, ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, oxidant hydrogen peroxide and catalyst phosphomolybdic acid into the reactor, at 60°C, normal pressure, stirring rate of 30rpm Under full contact for 6 hours, the above-mentioned substances are fully mixed to obtain a mixed system;

[0063] Among them, the concentration of hydrogen peroxide is 30%, the mass ratio between hydrogen peroxide and marine residual fuel oil is 1:8; the volume ratio between 1-butyl-3-methylimidazolium tetrafluoroborate and marine residual fuel oil The mass ratio between phosphomolybdic acid and marine residual fuel oil is 1:40.

[0064] S2. The mixed system was kept warm for about 3 hours, and it can be observed that the mixed system is stratified, wherein the lower layer is a sulfur-rich ...

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Abstract

The invention provides a method for removing sulfide in sulfur-containing raw oil by utilizing ionic liquid. The method comprises the following steps: sulfur-containing raw oil is contacted with ionicliquid, an oxidizing agent and a catalyst and then stands still so that an obtained mixed system is layered, the lower layer is a sulfur-rich ionic liquid phase, and the upper layer is a sulfur-pooroil phase; and the mixed system is separated, and the sulfur-poor oil phase at the upper layer is collected. According to the method for removing the sulfide in the sulfur-containing raw oil by utilizing the ionic liquid, the sulfide in the sulfur-containing raw oil can be effectively removed, and the operation cost is relatively low.

Description

technical field [0001] The invention relates to petroleum processing technology, in particular to a method for removing sulfides in sulfur-containing raw oil by using ionic liquids, in particular to a method for removing sulfides in atmospheric residue oil, vacuum residue oil, and marine residue fuel oil by using ionic liquids. sulfide method. Background technique [0002] With the improvement of my country's environmental protection requirements, the allowable sulfur content in marine residual fuel oil used by large ships has been continuously reduced. The allowable value of fuel sulfur content has been lowered from 3.5% to 0.5% (commonly known in the industry as the IMO 2020 New Deal). At present, the sulfur content in marine residual fuel oil is generally as high as more than 2%, so it is urgent to remove the sulfur compounds in marine residual fuel oil. [0003] In addition, in order to produce more light oil products, my country's refineries often adopt coking process....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/14C10G27/00C10G27/02C10G27/12
CPCC10G27/00C10G27/02C10G27/12C10G53/14C10G2300/10C10G2300/107C10G2300/1077C10G2300/202
Inventor 刘爱贤郭绪强孙强李兴洵王逸伟
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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