FCC (Fluid Catalytic Cracking) gasoline oxidation desulphurization method based on molybdenum polyoxometallate

A polyoxometalate and oxidative desulfurization technology, which is applied in chemical instruments and methods, refining with oxygen-containing compounds, chemical/physical processes, etc., can solve the problems of complex synthesis process and difficult reaction control, and achieve low dosage, High stability, simple method effect

Active Publication Date: 2014-03-26
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis process of this type of heteropolyacid is relatively complicated, and the reaction is not easy to control.

Method used

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  • FCC (Fluid Catalytic Cracking) gasoline oxidation desulphurization method based on molybdenum polyoxometallate
  • FCC (Fluid Catalytic Cracking) gasoline oxidation desulphurization method based on molybdenum polyoxometallate
  • FCC (Fluid Catalytic Cracking) gasoline oxidation desulphurization method based on molybdenum polyoxometallate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 FCC gasoline oxidative desulfurization method based on molybdenum polyoxometalate

[0017] (1) Catalyst 1-butylpyridine molybdate ([C 4 py] 4 Mo 8 o 26 ) preparation

[0018] The structure of 1-butylpyridine molybdate is shown in the following formula:

[0019]

[0020] Its synthesis method is as follows:

[0021] (1) Add a certain amount of pyridine and n-butane bromide in a molar ratio of about 1:1.2 into a round-bottomed flask at room temperature. 2 Stir and react at 40°C for 1 hour in an oil bath under protection, then heat to 70°C and reflux for 12 hours to obtain the reaction intermediate product [C 4 py]Br, adding a mixture of acetonitrile and ethyl acetate (volume ratio: 1:2) for recrystallization, and then washing with n-hexane for 2 to 3 times, then distilling and drying with a rotary evaporator to obtain pure [C 4 py] Br intermediate;

[0022] (2) A certain amount of diluted [C 4 py]Br aqueous solution was exchanged through a cation e...

Embodiment 2

[0029]Embodiment 2 Based on the method for oxidative desulfurization of FCC gasoline of molybdenum polyoxometalate

[0030] (1) Catalyst 1-hexyl-3-methylimidazolium molybdate ([C 6 mim] 4 Mo 8 o 26 ) preparation

[0031] The structure of 1-hexyl-3-methylimidazolium molybdate is shown in the following formula:

[0032]

[0033] Its synthesis method is as follows:

[0034] (1) Add a certain amount of N-methylimidazole and n-hexane bromide in a molar ratio of about 1:1.2 into a round-bottomed flask at room temperature. 2 Stir and react at 40°C for 1 hour in an oil bath under protection, then heat to 70°C and reflux for 12 hours to obtain the reaction intermediate product [C 6 mim]Br, to which a mixture of acetonitrile and ethyl acetate (1:2 by volume) was added for recrystallization, the obtained crystals were washed 2 to 3 times with n-hexane, and dried in vacuum to obtain pure [C 6 mim]Br intermediate;

[0035] (2) A certain amount of diluted [C 6 mim] Br aqueous so...

Embodiment 3

[0043] Embodiment 3 based on the method for oxidative desulfurization of FCC gasoline of molybdenum polyoxometalate

[0044] (1) Catalyst 1,2-dimethyl-3-ethylimidazolium molybdate ([C 2 dmim] 4 Mo 8 o 26 ) preparation

[0045]

[0046] Its preparation method is as follows:

[0047] (1) Add a certain amount of 1,2-dimethylimidazole to ethyl bromide in a molar ratio of about 1:1.2 into a round-bottomed flask at room temperature. 2 Stir and react at 40°C for 1 hour in an oil bath under protection, then heat to 70°C and reflux for 12 hours to obtain the reaction intermediate product [C 2 dmim]Br, recrystallized from a mixture of acetonitrile and ethyl acetate (volume ratio 1:2), washed 2 to 3 times with an appropriate amount of n-hexane, and distilled and dried by a rotary evaporator to obtain pure [C 2 dmim] Br intermediate;

[0048] (2) A certain amount of diluted [C 2 dmim]Br aqueous solution was exchanged through a cation exchange resin column, and the effluent solu...

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Abstract

The invention relates to a FCC gasoline oxidation desulphurization method based on molybdenum polyoxometallate. A technical scheme used is as follows: molybdenum polyoxometallate based on Mo8O26 negative ions is used as a catalyst, and the catalyst, an ionic liquid, a hydrogen peroxide solution and FCC gasoline are mixed; desulphurization temperature is 40-70 DEG C, pressure is ordinary pressure, and desulphurization time is 0.5-1.5 hours; after reaction, reactant is cooled to room temperature, and is subjected to standing and layering, wherein the upper layer is the desulphurized FCC gasoline; measurement shows that primary desulfurization degree of the method to the FCC gasoline with initial sulphur content of about 114ppm is more than 95%, and the sulphur content can be reduced to be less than 10ppm; the ionic liquid and the catalyst at the lower layer can be recycled after being treated by evaporative dehydration through a rotary evaporator, back extraction so as to separate sulfone compounds, and drying under vacuum condition. In the method, catalyst dosage is low and desulfurization degree is high; moreover, the ionic liquid can be recycled, oil yield is high, cost is low, and environment pollution is prevented.

Description

technical field [0001] The invention belongs to the field of FCC gasoline desulfurization methods, in particular to a method for catalytic oxidation-extraction desulfurization of FCC gasoline based on molybdenum polyoxometalate coupled ionic liquid. Background technique [0002] Sulfur-containing substances in fuel oil will generate sulfur oxides SO when burned at high temperature x , causing great harm to the environment and human health. With the enhancement of people's awareness of environmental protection and the improvement of vehicle fuel exhaust emission standards, countries around the world are increasingly restricting the sulfur content of fuel oil products. It is imperative to produce and use ultra-low sulfur fuel oil, while traditional desulfurization methods are difficult. Meet the requirements of deep desulfurization. Oxidative desulfurization (ODS) is to oxidize organic sulfur compounds into sulfones through oxidants, increase their polarity, make them more s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/12B01J31/16
Inventor 臧树良周明东李蕊颜文超吴爽
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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