A method for oxidative desulfurization based on polyethyleneimine-immobilized heteropolyacid catalyst

A polyethyleneimine, oxidative desulfurization technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of poor compatibility and poor oxidative desulfurization effect. and other problems, to achieve the effect of increasing compatibility, mild reaction conditions, and simple operation process

Active Publication Date: 2020-06-02
HAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention relates to an oxidative desulfurization method based on polyethyleneimine immobilized heteropolyacid catalyst. The invention adopts polyethyleneimine immobilized heteropolyacid to increase the specific surface area of ​​heteropolyacid, and at the same time, it can also increase heteropolyacid and ionic liquid Compatibility, using it as a catalyst for oxidative desulfurization can solve the technical problem of poor compatibility between inorganic solid-supported heteropolyacids and oil phase, resulting in poor oxidative desulfurization effect. At the same time, using this catalyst for oxidative desulfurization, The reaction conditions are mild, the operation is simple, and the sulfide in the oil can be effectively removed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Polyethyleneimine / H 3 PW 12 o 40 Preparation of:

[0027] Add 1.8g of polyethyleneimine to 50ml of deionized water at a temperature of 30°C and stir for 2 hours to obtain a polyethyleneimine solution; dissolve 2.8g of heteropolyacid in 30ml of deionized water to form a solution, and add dropwise The temperature of the above polyethyleneimine solution was controlled at 40° C. and vigorously stirred for 2 hours to obtain the polyethyleneimine-immobilized heteropolyacid catalyst.

Embodiment 2

[0029] Polyethyleneimine / H 3 PMo 12 o 40 Preparation of:

[0030] Add 1.5g of polyethyleneimine to 40ml of deionized water at 40°C, stir for 3 hours to obtain a polyethyleneimine solution; dissolve 2g of heteropolyacid in 20ml of deionized water to make a solution, and add the above The temperature of the polyethyleneimine solution was controlled at 45° C., and the mixture was vigorously stirred for 4.5 hours to obtain the polyethyleneimine-immobilized heteropolyacid catalyst.

Embodiment 3

[0032] Polyethyleneimine / H 4 SiW 12 o 40 Preparation of:

[0033] Add 1.5g of polyethyleneimine to 40ml of deionized water at a temperature of 50°C and stir for 2 hours to obtain a polyethyleneimine solution; dissolve 2g of heteropolyacid in 20ml of deionized water to make a solution, and add the above The temperature of polyethyleneimine solution was controlled at 50°C and vigorously stirred for 4 hours to obtain the polyethyleneimine immobilized heteropolyacid catalyst.

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PUM

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Abstract

The invention belongs to the crossing field of petrochemical oil deep processing industry and environmental protection technology, and particularly relates to an oxidative desulfurization method basedon polyethyleneimine fixed heteropoly acid catalyst. Hydrogen peroxide is taken as an oxidant, polyethyleneimine fixed heteropoly acid is taken as a catalyst, oil and ionic liquid are mixed in proportion, reaction is performed at a certain temperature and normal pressure, cooling is performed to room temperature after reaction, and thiophene sulfur-containing compounds in the oil are removed. Compared with a traditional catalyst, the method has mild desulfurization conditions and can be used for desulfurization in a low-concentration hydrogen peroxide (0.5%-5%) system, the decomposition rateof hydrogen peroxide is low, and the desulfurization effect in the oil is good.

Description

technical field [0001] The invention belongs to the interdisciplinary field of petrochemical oil product deep processing and environmental protection technology, and specifically relates to an oxidative desulfurization method based on a polyethyleneimine immobilized heteropolyacid catalyst. Background technique [0002] Environmental problems and health hazards caused by exhaust emissions from oil-powered locomotives, increasingly stringent environmental regulations and air quality standards on the sulfur content of oil products, and the growing demand for low-sulfur diesel fuel have prompted many Scientists have invested more and more attention and efforts in the research of oil desulfurization. Among them, reducing the emission of sulfur oxides, particulate matter and other harmful pollutants is the main purpose of many countries to limit the level of sulfur content in oil products to lower and lower. Studies have found that by using low-sulfur fuel oil and particulate ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/04B01J31/34B01J31/36
CPCB01J31/34B01J31/36C10G45/04C10G2300/202
Inventor 戴春燕陈光英朱林华王向辉
Owner HAINAN NORMAL UNIV
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