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FCC gasoline electrochemical desulfurization method based on ionic liquid

An ionic liquid and electrochemical technology, which is applied in the field of electrochemical desulfurization based on ionic liquid, can solve the problems of large usage of ionic liquid, harsh equipment and process requirements, and non-compliance with green chemical industry, and achieve mild conditions and simple process Effect

Active Publication Date: 2015-03-11
爱瑞克(大连)安全技术集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are some patents and papers on the use of ionic liquids to catalyze desulfurization of oil products, but most of the methods used are oxidation methods, or extraction-oxidation methods. The use of ionic liquids is large, and the requirements for equipment and processes are relatively strict, which does not meet the requirements of green chemical industry. requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1: 1-butyl-3-methyl-imidazolium perrhenate ionic liquid used in electrochemical desulfurization method

[0011] Put 1-butyl-3-methyl-imidazolium perrhenate ionic liquid and FCC gasoline into the electrolytic cell, the amount of ionic liquid added is 1 / 50 (volume ratio) of FCC gasoline, and the working electrode, counter electrode, The reference electrode is connected to the electrolysis line with the corresponding chuck of the electrochemical workstation, adjust the height of the electrode so that the electrode is fully immersed in the liquid, control the reaction temperature at 20°C, turn on the power, control the voltage 1.6V, and under normal pressure, the power-on time is 2 hours . Take out the reacted oil product and measure the sulfur content with a microcoulomb comprehensive analyzer. The desulfurization rate reaches over 98%, and the sulfur content is reduced from the initial 500ppm to below 10ppm, meeting the Euro V emission standard.

Embodiment 2

[0012] Embodiment 2: Ethylpyridine trifluoroacetate ionic liquid is used in electrochemical desulfurization method

[0013] Put ethylpyridine trifluoroacetate ionic liquid and FCC gasoline into the electrolytic cell, the amount of ionic liquid added is 1 / 50 (volume ratio) of FCC gasoline, and the working electrode, counter electrode and reference electrode are respectively connected with electrochemical Connect the corresponding chuck of the workstation to the electrolysis line, adjust the height of the electrode so that the electrode is completely immersed in the liquid, control the reaction temperature at 20°C, turn on the power, control the voltage at 1.0V, and under normal pressure, the power-on time is 0.5 hours. Take out the reacted oil product and measure the sulfur content with a microcoulomb comprehensive analyzer. The desulfurization rate reaches over 95%, and the sulfur content is reduced from the initial 500ppm to below 10ppm, meeting the Euro V emission standard...

Embodiment 3

[0014] Example 3 Tetraoctylammonium acetate ionic liquid used in electrochemical desulfurization method

[0015] Put tetraoctylammonium acetate ionic liquid and FCC gasoline into the electrolytic cell, the amount of ionic liquid added is 1 / 25 (volume ratio) of FCC gasoline, and the working electrode, counter electrode, and reference electrode are respectively connected to the corresponding electrodes of the electrochemical workstation. Connect the chuck to the electrolysis line, adjust the height of the electrode so that the electrode is fully immersed in the liquid, control the reaction temperature at 50°C, turn on the power, control the voltage at 1.6 V, and under normal pressure, the power-on time is 1.5 hours, take out the oil after the reaction with a microcoulomb The comprehensive analyzer determines the sulfur content. The sulfur content is reduced from the initial 100ppm to less than 10ppm, meeting the Euro V emission standard.

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PUM

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Abstract

The invention relates to an FCC gasoline electrochemical desulfurization method based on ionic liquid. The method comprises the following steps of: putting a fixed amount of ionic liquid and gasoline into an electrolytic tank, wherein the addition amount of the ionic liquid is 1 / 25-1 / 50 of that of the FCC gasoline by volume; connecting a working electrode, a counter electrode and a reference electrode with an electrolysis line with a chuck corresponding to an electrochemical workstation respectively; adjusting the electrode height so that the electrode is totally soaked in the liquid; controlling the reaction temperature to 20-80 DEG C; starting the power; and controlling the voltage to 1.0-2.5V, wherein the power-on time is 0.5-2 hours. Through the method provided by the invention, the desulfurization rate exceeds 95%, the sulfur content in the FCC gasoline can be reduced to below 10ppm, other quality indexes are not influenced, and the gasoline quality is upgraded to the European V standard. According to the invention, the technology is simple and can be performed at normal temperature under normal pressure; and moreover, the conditions are mild, byproducts are avoided, and the sulfides in fuel can be removed without changing the fuel composition.

Description

technical field [0001] The invention belongs to the fields of chemical catalysis and gasoline and diesel desulfurization, and in particular relates to an ionic liquid-based electrochemical desulfurization method. Background technique [0002] Since the electrochemical reaction is usually carried out at normal temperature and pressure, the toxicity and hazards are less than those of traditional organic synthesis methods. Electrochemical process is also an important part of clean technology. In today's increasingly severe global environmental problems, electrochemical technology has shown its importance even more. Ionic liquids have high ionic conductivity, negligible vapor pressure, and wide electrochemical window, all of which are important for electrochemical reactions. [0003] Countries around the world have put forward stricter requirements on the sulfur content in oil products, and the production of clean oil products with low sulfur content has become a top priority. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G32/02
Inventor 臧树良房大维宋笑雨
Owner 爱瑞克(大连)安全技术集团有限公司
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