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Method for utilizing modified polyethylene glycol to remove thiophene sulfur in gasoline

A polyethylene glycol and polyethylene glycol technology, which is applied in the petrochemical field, can solve the problems of poor performance of light oil, and achieve the effects of stable physical properties, good desulfurization effect and simple operation.

Inactive Publication Date: 2018-05-15
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, EDS works better on heavy oils like diesel but less well on light oils like gasoline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Extractant polyethylene glycol dimethyl ether, molecular weight 500, the mass ratio of extractant to fuel is 1, the extraction temperature is 20°C, the extraction time is 15min, the fuel used is n-octane-thiophene, and the initial sulfur content is 1000μg / g. After the extraction operation, the desulfurization rate is 65.5%, and the mass distribution coefficient is 1.85.

Embodiment 2

[0017] Extractant polyethylene glycol dimethyl ether, molecular weight 250, mass ratio of extractant to fuel oil 0.2, extraction temperature 30°C, extraction time 15min, fuel oil used is n-octane-thiophene, initial sulfur content is 1000μg / g, after After the extraction operation, the desulfurization rate is 27.7%, and the mass distribution coefficient is 1.90.

Embodiment 3

[0019] Extractant polyethylene glycol dimethyl ether, molecular weight 250, the mass ratio of extractant to fuel oil is 1, extraction temperature is 30°C, extraction time is 15min, fuel oil used is n-octane-toluene-thiophene, and the mass fraction of toluene is 15%. The initial sulfur content is 1000μg / g, after the extraction operation, the desulfurization rate is 64.4%, and the mass distribution coefficient is 1.70.

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Abstract

The invention relates to a method for utilizing modified polyethylene glycol to remove thiophene sulfur in gasoline. According to the method, a polyethylene glycol monomethyl ether or polyethylene glycol dimethyl ether extracting agent with the average molecular weight as 150 to 600 is mixed and extracted with high thiophene sulfur fuel oil according to a mass ratio of 0.1 to 3; thus, most sulfurin the fuel oil can be removed, and a mass distribution coefficient is 1.8 or more. The extracting agent has the advantages of stable physical property, insolubility to the fuel oil, no oil pollutionand no self loss; after recycling and regenerating, extracting and desulfurizing capacity of the extracting agent fundamentally keeps unchanged; the whole desulfurizing technology has the advantages of moderate conditions, no high-temperature and high-pressure conditions, simpleness in operation and no requirement for complex and expensive equipment; furthermore, the extracting agent can be recycled repeatedly, so that desulfurizing cost is low; the extracting agent is suitable for desulfurizing treatment of the high thiophene sulfur fuel oil.

Description

technical field [0001] The invention relates to the field of petrochemical technology, in particular to a method for removing thiophene sulfur in gasoline by using modified polyethylene glycol. Background technique [0002] Gasoline contains a lot of organic sulfides, such as sulfides, mercaptans, thiophenes, etc. Among them, sulfides and mercaptans are easier to remove by hydrodesulfurization, but the hydrogenation activity of thiophene sulfides is low, so it is difficult to remove. The S-zorb process is a commonly used gasoline desulfurization technology, but its process conditions are still harsh (>300°C; >1Mpa), and the loss of adsorbent is also relatively large. In order to make the process conditions more mild, extractive desulfurization (EDS) and adsorption desulfurization have become potential alternative technologies. Among them, EDS can achieve desulfurization at normal temperature and pressure, and is easy to operate, and has received widespread attention....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/16
CPCC10G21/16C10G2300/202C10G2400/02
Inventor 高家俊朱爽余雅黔张佳锦熊春艳姜兴茂
Owner WUHAN INSTITUTE OF TECHNOLOGY
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