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Ultrasonic oxidation-extraction and deep desulfurization method for diesel oil

A technology for deep desulfurization and diesel oil, which is applied in the multi-stage series refining process, etc., can solve the problems of difficult separation, long reaction time, poor oxidation performance, etc., and achieves the advantages of short process route, short reaction time, and improved oxidation performance. Effect

Inactive Publication Date: 2015-04-15
WUHAN GLT ENERGY & ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Using only heteropolyacids as catalysts, hydrogen peroxide has poor oxidation performance on organic sulfur, and additional phase transfer agents need to be added, and the reaction time is longer, which brings difficulties to subsequent separations.

Method used

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  • Ultrasonic oxidation-extraction and deep desulfurization method for diesel oil
  • Ultrasonic oxidation-extraction and deep desulfurization method for diesel oil
  • Ultrasonic oxidation-extraction and deep desulfurization method for diesel oil

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Effect test

Embodiment 1

[0032] Diesel ultrasonic oxidation-extraction deep desulfurization method, such as figure 1 shown, including the following steps:

[0033] 1) Mix hydrogen peroxide, methanol, and phosphotungstic acid evenly, and then mix them online with sulfur-containing diesel, wherein the molar ratio of hydrogen peroxide to sulfur-containing diesel is 48:1, and the amount of methanol added is the volume of sulfur-containing diesel The amount of phosphotungstic acid added is 0.01% of the mass of sulfur-containing diesel;

[0034] 2) The above mixture is subjected to ultrasonic oxidation desulfurization reaction in an ultrasonic reactor, the ultrasonic transducer 1 emits ultrasonic frequency into the cylinder 4 at a frequency of 10KHz, and the sound field intensity is 6000W / m 2 , the length d of the cylinder 4 is 15cm, the ultrasonic oxidation temperature is 85°C, and the ultrasonic oxidation time is 60min;

[0035] 3) The mixture after the ultrasonic oxidation desulfurization reaction is sen...

Embodiment 2

[0039] Diesel ultrasonic oxidation-extraction deep desulfurization method, such as figure 1 shown, including the following steps:

[0040] 1) Mix tert-butyl hydroperoxide, ethanol, and sodium phosphotungstate evenly, and then mix it with sulfur-containing diesel online, wherein, the molar ratio of tert-butyl hydroperoxide to sulfur-containing diesel is 24:1, and the molar ratio of ethanol The addition amount is 30% of the volume of sulfur-containing diesel oil, and the addition amount of sodium phosphotungstate is 0.1% of the mass of sulfur-containing diesel oil;

[0041] 2) The above mixture is subjected to ultrasonic oxidation desulfurization reaction in the ultrasonic reactor, the ultrasonic transducer 1 emits ultrasonic frequency into the cylinder 4 at a frequency of 10KHz, and the sound field intensity is 1000W / m 2 , the length d of the cylinder 4 is 50cm, the ultrasonic oxidation temperature is 105°C, and the ultrasonic oxidation time is 10min;

[0042] 3) The mixture ...

Embodiment 3

[0046] Diesel ultrasonic oxidation-extraction deep desulfurization method, such as figure 1 shown, including the following steps:

[0047] 1) Mix hydrogen peroxide, ethylene glycol, and phosphomolybdic acid evenly, and then mix them online with sulfur-containing diesel oil. The molar ratio of hydrogen peroxide to sulfur-containing diesel oil is 6:1, and the amount of ethylene glycol added is 20% of the volume of sulfur-containing diesel, the amount of phosphomolybdic acid added is 0.8% of the mass of sulfur-containing diesel;

[0048] 2) The above mixture is subjected to ultrasonic oxidation desulfurization reaction in the ultrasonic reactor, the ultrasonic transducer 1 emits ultrasonic frequency into the cylinder 4 at a frequency of 60KHz, and the sound field intensity is 6000W / m 2 , the length d of the cylinder 4 is 45cm, the ultrasonic oxidation temperature is 90°C, and the ultrasonic oxidation time is 15min;

[0049] 3) The mixture after the ultrasonic oxidation desulfur...

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Abstract

The invention discloses an ultrasonic oxidation-extraction and deep desulfurization method for diesel oil. The method comprises the steps: firstly, uniformly mixing an oxidizing agent, a cosolvent and a catalyst, then, mixing the mixture with sulfur-contained diesel oil on line, and next, carrying out ultrasonic oxidative desulphurization reaction in an ultrasonic reactor; delivering the mixture after reacting into a settling tank for separating to obtain a catalyst-contained solvent to be recycled and diesel oil to be subjected to solvent extraction, and separating organic sulfur in the diesel oil to obtain desulfurized diesel oil; carrying out reduced pressure distillation on the extracted solvent, recycling the separated solvent, and retreating the separated organic sulfur. By using the ultrasonic oxidation-extraction and deep desulfurization method, not only can the oxidation performance of the oxidizing agent to organic sulfur be improved, but also the cosolvent can be used for extracting organic sulfur in the diesel oil to obtain the solvent in the ultrasonic oxidation reaction, a phase transfer catalyst is not needed to be additionally added, the subsequent separation operation is easy, and the sulfur content of the desulfurized diesel oil is not higher than 10ppm. In addition, the ultrasonic oxidation-extraction and deep desulfurization method has the advantages of no adoption of organic acid capable of corroding equipment, short process route and low oil loss.

Description

technical field [0001] The invention relates to a method for desulfurizing diesel oil, in particular to a method for ultrasonic oxidation-extraction deep desulfurization of diesel oil. Background technique [0002] The increasingly stringent environmental protection requirements have made the world's oil refining industry face the severe challenge of producing cleaner diesel fuel. The production of clean diesel has become the main theme of today's refineries, and the reduction of sulfur content is the top priority in the production of clean diesel. The United States requires gasoline sulfur content to be reduced to 10-30ppm. Europe and the United States have also put forward strict restrictions on the sulfur content of diesel oil. The sulfur content of diesel oil in Europe will be reduced from 350ppm to 50ppm in 2005, and recently dropped to 10ppm; . In order to meet the new opportunities and new challenges of clean fuel production in the new century, various new technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/14
Inventor 余国贤钟倩周晓龙张娜李海峰吴宏观
Owner WUHAN GLT ENERGY & ENVIRONMENTAL TECH CO LTD
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