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Method for removing nitride in oil product by polysulfonate ion liquid

A polysulfonate, ionic liquid technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of limited nitrogen removal capacity, difficulty in non-basic nitrogen removal, and low usage, and achieve low environmental hazards. , The effect of high acid density and low usage

Active Publication Date: 2018-01-09
磁悬浮润滑油(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the high solvent-to-oil ratio, high cost, difficulty in removing non-basic nitrogen in oil and limited ability to remove nitrogen in actual oil, etc. Problem, the present invention discloses a method for removing nitrogen compounds in oil products by using polysulfonate ionic liquids. On the one hand, it uses its strong acidity to protonate non-basic nitrogen compounds represented by indole and further react to form oligo Polymer transformation and removal; on the other hand, basic nitrogen compounds represented by quinoline can be sulfonated into 8-sulfonic acid quinoline for removal; multisulfonate ionic liquids can also promote the thiophenes in oil Sulfur compounds and olefins are alkylated to reduce the interference of sulfur-containing compounds on the denitrification process; it has high acid density, small agent-oil ratio in the denitrification process, less usage, good repeatability, mild reaction conditions, and preparation Advantages of low cost and less harmful to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Preparation of ionic liquid:

[0028] a) Mix hexamethylenetetraammonium and 1,4-butane sultone at a molar ratio of 1:6 and put it into a microwave reactor. o After C was treated for 1.5h, vacuum drying was carried out to obtain substance X;

[0029] b) After mixing material X and 98wt% concentrated sulfuric acid at a molar ratio of 1:1 at room temperature, they were placed in a microwave reactor again and reacted at 40°C for 1h at a power of 200w, and then vacuum-dried to obtain Sulfonate ionic liquid.

[0030] Put 1g of ionic liquid sample into a glass reactor with magnetic stirring, and then add 300mL of quinoline simulated oil with a nitrogen content of 250mg / L, stir and react at room temperature for 30min, settle for 30min and absorb the upper layer Use TNS-3000 nitrogen and sulfur element analyzer to measure the nitrogen content of nitrogen in the oil, and the nitrogen removal rate is 99.96%.

Embodiment 2

[0032] 1) Preparation of ionic liquid:

[0033] a) Mix hexamethylene tetraammonium and 1,4-butane sultone in a molar ratio of 1:6 and put it into a microwave reactor, and put it under 300w power at 25 o C was treated for 30 minutes, and then the sample was taken out for vacuum drying to obtain substance X;

[0034] b) After mixing material X and 98wt% concentrated sulfuric acid at a molar ratio of 1:1 at room temperature, they were placed in a microwave reactor again and reacted at 40°C for 1h at a power of 200w, and then vacuum-dried to obtain Sulfonate ionic liquid.

[0035] Put 1g of ionic liquid sample into a glass reactor with magnetic stirring, and then add 300mL of pyridine simulated oil with a nitrogen content of 250mg / L, stir and react at room temperature for 20min, settle for 30min and absorb the upper layer of oil Use TNS-3000 nitrogen and sulfur element analyzer to measure the nitrogen content of nitrides in the product, and the removal rate of nitrides is 99.86%...

Embodiment 3

[0037] 1) Preparation of ionic liquid:

[0038] a) Mix hexamethylenetetraammonium and 1,4-butane sultone in a molar ratio of 1:6 and put it into a microwave reactor, and set it at 40 o After C was treated for 1 hour, vacuum drying was carried out to obtain substance X;

[0039] b) After mixing material X and 98wt% concentrated sulfuric acid at a molar ratio of 1:1 at room temperature, they were placed in a microwave reactor again and reacted at 40°C for 1h at a power of 200w, and then vacuum-dried to obtain Sulfonate ionic liquid.

[0040] Put 1g of ionic liquid sample into a glass reactor with magnetic stirring, then add 300mL simulated oil of quinoline and pyridine mixture with a nitrogen content of 250mg / L, stir and react at room temperature for 25min, and settle After 30 minutes, absorb the upper layer of oil and use a TNS-3000 nitrogen and sulfur analyzer to measure the nitrogen content of nitrides, and the removal rate of nitrides is 99.91%.

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PUM

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Abstract

The invention discloses a method for removing nitride in an oil product by polysulfonate ion liquid. The method comprises the following steps: adding the polysulfonate ion liquid in the oil product; enabling non-alkaline nitride in the oil product to be removed by protonation; and enabling alkaline nitride in the oil product to be removed by sulfonation. On one hand, the non-alkaline nitride whichtakes indole as a representative is subjected to protonation by strong acid, and is further reacted to generate an oligomer and then is removed by conversion; on the other hand, the alkaline nitridewhich takes quinolone as a representative can be converted into 8-sulphonic acid quinoline by sulfonation and then is removed; and a thiophene sulfur-containing compound in the oil product and olefinssubstances are subjected to alkylation so as to reduce interference of the sulfur-containing compound to a denitrification process. The method has the advantages of high acid density, low catalyst-oil ratio in the denitrification process, small use amount, good repeatability, gentle reaction conditions, low preparation cost, low environmental hazard and the like.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and relates to a method for removing nitrogen oxides in oil products, in particular to a method for removing nitrogen oxides in oil products by using polysulfonate ion liquid. Background technique [0002] With the rapid development of my country's economy, the consumption of the three major fossil fuels, coal, oil and natural gas, is gradually increasing. Among them, petroleum products, which are the main fuel for transportation, create a large amount of economic value. Pollution is also becoming more and more serious. With the increasing pressure of environmental protection, more stringent requirements are put forward for the clean production of fuel oil. [0003] The removal of nitrogen compounds in oil is a major problem in the clean production of fuel oil. Conventional methods for removing nitrogen compounds include hydrodenitrogenation and non-hydrogenation denitrogenation. H...

Claims

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Application Information

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IPC IPC(8): C10G29/28
Inventor 李俊霞
Owner 磁悬浮润滑油(苏州)有限公司
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