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Application of spinel ferrite magnetic nanocatalyst in oil desulfurization

A spinel ferrite, magnetic nanotechnology, applied in the field of oil desulfurization, can solve problems such as slow direct reaction

Active Publication Date: 2021-08-24
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, persulfates are thermodynamically strong oxidants, and their direct reactions are too slow, so activation is required, especially for inorganic persulfates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0019] The present invention utilizes coprecipitation M 2+ and Fe 3+ Chloride to prepare MFe 2 o 4 (M = Co, Ni, Zn, Cu, Mn) and other ferrite magnetic nano-catalysts, and apply it to the oxidation extraction desulfurization process, including the following steps:

[0020] Step 1. At room temperature, take 10 mmol FeCl 3 ·6H 2 O and (5~5.5) mmol MCl 2 ·6H 2 O was mixed in ethylene glycol to obtain a clear solution, after which NaAc (3.5~7.5g) and polyethylene glycol (0.8~2.0g) were added, and the mixture was vigorously stirred for 20~40min to make the resulting solution clear again. Then seal in a Teflon-lined stainless steel autoclave (100ml capacity) Heat the autoclave to 200°C and keep it for 8-72h, after cooling to room temperature, wash the black product several times with ethanol and dry at 60°C for 4-8h , to obtain spinel ferrite magnetic nano MFe 2 o 4 Catalyst, spare;

[0021] Step 2, the magnetic nanometer MFe that 0.8-1.2g extractant and 0.04g step 1 make ...

Embodiment 1

[0028] (1) Add 10mmol FeCl 3 ·H 2 O and 5 mmol CoCl 2 ·6H 2 O is directly dissolved in a beaker containing 80ml of ethylene glycol, then 7.2g of NaAc and 2.0g of polyethylene glycol are added respectively, and after mixing and stirring for 30 minutes, the mixed solution is transferred to a polytetrafluoroethylene-lined stainless steel autoclave for sealing. Put it in a vacuum drying oven and store it in vacuum at 200°C for 8-72 hours. After the reaction is complete, cool it down to room temperature and then wash it by centrifugation. Put the crude product in a drying oven and dry it at 60°C for 6 hours to obtain CoFe 2 o 4 ;

[0029] (2) Mix 1.0g N,N-dimethylformamide and 0.04g CoFe prepared in step (1) 2 o 4 Mix with 4g of fuel oil with an initial sulfur content of 500ppm to obtain a mixed solution; then add 0.4g of K 2 S 2 o 8 Under stirring conditions, react at 60°C for 120 minutes to complete the desulfurization of fuel oil;

[0030] (3) The desulfurization syste...

Embodiment 2

[0033] (1) Add 10mmol FeCl 3 ·H 2 O and 5 mmol NiCl 2 ·6H 2 O is directly dissolved in a beaker containing 80ml of ethylene glycol, then 7.2g of NaAc and 2.0g of polyethylene glycol are added respectively, and after mixing and stirring for 30 minutes, the mixed solution is transferred to a polytetrafluoroethylene-lined stainless steel autoclave for sealing. Put it in a vacuum drying oven and store it in vacuum at 200°C for 8-72h. After the reaction is complete, cool it down to room temperature, then centrifuge and wash it, put the crude product in a drying oven, and dry it at 60°C for 6 hours 2 o 4 ;

[0034] (2) 1.0g of 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid and 0.04g of NiFe prepared in step (1) 2 o 4 Mix with 4g of fuel oil with an initial sulfur content of 500ppm to obtain a mixed solution; then add 0.4g k 2 S 2 o 8 Under stirring conditions, react at 80°C for 120 minutes to complete the desulfurization of fuel oil;

[0035] (3) The desulfuriz...

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Abstract

The invention relates to the application of spinel ferrite magnetic nano-catalysts in oil desulfurization, which belongs to the field of petrochemical industry. The invention first utilizes co-precipitation M 2+ and Fe 3+ Chloride to prepare MFe 2 o 4 Ferrite magnetic nano-catalyst, the prepared catalyst has a strong structure, high temperature resistance, and is not easy to agglomerate; it is used in the process of oxidative extraction and desulfurization, with high reactivity, good desulfurization effect, convenient recovery, and good catalyst reuse effect; it can not only catalyze hydrogen peroxide as the oxidant The oxidative extraction desulfurization process can also catalyze the desulfurization process using the easy-to-obtain inorganic persulfate directly as the oxidant.

Description

technical field [0001] The invention belongs to the technical field of oil product desulfurization related to the field of petrochemical industry, and in particular relates to the preparation of a spinel ferrite magnetic nano catalyst and its application in oil product desulfurization. Background technique [0002] With the rapid development of the economy, the use of fuel oil is increasing day by day, and the resulting pollution problems are also increasingly puzzling people. Therefore, in recent years, people have never stopped researching on issues such as fuel oil desulfurization. Studies have shown that 1 / 3 of the sulfur in the air is obtained from the combustion of automobile fuel and re-emission. As we all know, there are various sulfur compounds in fuel oil, including elemental sulfur, hydrogen sulfide, mercaptans, sulfides, cyclic sulfides, disulfides, thiophenes and their homologues, etc. These sulfides are burned to generate sulfur oxides, and then released into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G21/12C10G21/18C10G21/20C10G21/22C10G21/24C10G27/12B01J23/75B01J23/755B01J23/80B01J23/745
CPCC10G21/18C10G21/24C10G21/22C10G21/20C10G21/12C10G27/12B01J23/75B01J23/755B01J23/80B01J23/745C10G2300/202B01J35/33
Inventor 郭亚菲徐航段永华王重锦
Owner HENAN UNIV OF SCI & TECH
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