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Attapulgite clay-supported heteropoly acid phase-transfer catalyst for oxidative desulfurization of fuel

A phase transfer catalyst, attapulgite clay technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, catalyst activation/preparation, etc., can solve the problems of low desulfurization rate and high cost, and achieve Low cost, cost reduction, and effect of improving catalytic desulfurization effect

Inactive Publication Date: 2011-03-23
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of low desulfurization rate and high cost of the existing fuel oil desulfurization method, and provide an efficient and cheap attapulgite clay-loaded heteropolyacid phase transfer catalyst for oxidative desulfurization of fuel oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 20g of sodium tungstate and 1g of sodium dihydrogen phosphate into a reactor filled with 100mL of distilled water, and stir at 60°C for 3h. Then add 30 g of 2 mol / L hydrochloric acid to treat the attapulgite clay, continue to stir for 1 hour, then add dropwise 100 mL of an aqueous solution in which 15 g of cetyltrimethylammonium bromide is dissolved, and stir vigorously for 6 hours. After the reaction, the product was washed with distilled water, then dried at 70° C. to constant weight, crushed, and passed through a 200-mesh sieve. The product in this embodiment has a desulfurization rate of more than 90% for fuel oil, the sulfur content can be reduced to below 100ppm, and the oxidation efficiency of hydrogen peroxide is obviously higher than that of small molecule organic acids.

Embodiment 2

[0027] Add 15g of sodium tungstate, 1.2g of sodium molybdate and 1g of sodium dihydrogen phosphate into a reactor filled with 100mL of distilled water, and stir at 70°C for 2h. Then add 40 g of attapulgite clay heat-treated at 400 degrees, continue to stir for 1 hour, then add dropwise 100 mL of an aqueous solution in which 10 g of tetradecyltrimethylammonium bromide is dissolved, and stir vigorously for 6 hours. After the reaction, the product was washed with distilled water, then dried at 70° C. to constant weight, crushed, and passed through a 200-mesh sieve. The product in this embodiment has a desulfurization rate of more than 92% for fuel oil, the sulfur content can be reduced to below 90ppm, and the oxidation efficiency of hydrogen peroxide is obviously higher than that of small molecule organic acids.

Embodiment 3

[0029] Add 20g sodium tungstate, 1.5g sodium molybdate, 1.5g ammonium metavanadate and 1g sodium dihydrogen phosphate into a reactor filled with 100mL dihydrogen phosphate, stir and react at 80°C for 2h, then add 50g iron ion exchange attapulgite clay, The stirring reaction was continued for 1h. Then, 100 mL of an ethanol solution in which 20 g of dioctadecyldimethylammonium bromide was dissolved was added dropwise, and the reaction was vigorously stirred for 6 h. After the reaction, the product was washed with an alcohol-water solution, then dried at 70° C. to constant weight, crushed, and passed through a 200-mesh sieve. The product in this embodiment has a desulfurization rate of more than 95% for fuel oil, the sulfur content can be reduced to below 80ppm, and the oxidation efficiency of hydrogen peroxide is obviously higher than that of small molecule organic acids.

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PUM

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Abstract

The invention discloses an attapulgite clay-supported heteropoly acid phase-transfer catalyst for oxidative desulfurization of fuel. The attapulgite clay is used as a catalyst support, wherein the active ingredients consist of quaternary ammonium salt and heteropoly acid; and the catalyst comprises the following raw materials in part by mass: 10 to 50 parts of quaternary ammonium salt, 10 to 60 parts of heteropoly acid and 20 to 80 parts of attapulgite clay. The catalyst can realize deep desulfurization of the fuel.

Description

technical field [0001] The invention relates to an attapulgite clay-supported heteropolyacid phase transfer catalyst for fuel oil oxidation desulfurization, and more specifically relates to a composite phase transfer catalyst composed of a quaternary ammonium salt, a heteropolyacid and attapulgite clay. Background technique [0002] The sulfur in fuel oil generates sulfur oxides during combustion, which not only corrodes the parts of the automobile engine and causes catalyst poisoning of the automobile exhaust purification system, but also is the main automobile exhaust pollutant. The sulfur content in fuel oil can significantly promote the production of NOx and particulate matter, which is extremely harmful to the environment and human health. With the continuous increase of usage, the environmental hazards of exhaust gas produced after oil combustion are also becoming more and more serious. For this reason, various countries have set strict standards for the sulfur conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J27/18B01J23/30B01J23/22B01J23/04B01J21/08B01J35/02B01J37/00C10G27/12B01J35/00
Inventor 张俊平王爱勤
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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