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Method for removing thiophene sulfur-containing compound from petroleum

A compound, thiophene technology, applied in the field of petroleum oil alkylation desulfurization, can solve the problem of low selectivity, achieve high catalytic activity, low polymerization activity, and high conversion rate

Active Publication Date: 2014-07-09
车春玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The deficiencies of the existing alkylation desulfurization technology are:
[0016]2. The selectivity of existing solid acid catalysts to catalyze the alkylation reaction of sulfur-containing compounds in gasoline components is not high

Method used

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  • Method for removing thiophene sulfur-containing compound from petroleum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] complexed with Fe 3+ Preparation of ionic cation exchange resin (NKC-9) catalyst:

[0047] Convert macroporous sulfonated styrene-diethylene copolymerized cation exchange resin into hydrogen-type resin, wash and dry with distilled water, take 30g into a 250ml three-hole flask, add 250ml, 1,2-dichloroethane, heat to 30°C Stir for 12 hours to fully swell the resin particles, then add 30g FeCl 3 , reacted under reflux for 16 hours, so that Fe 3+ A complex reaction occurs between the ions and the sulfonate groups in the resin skeleton, the resin is filtered out, washed with 1,2-dichloroethane until the filtrate is clear, the resin is taken out, dried in vacuum at 60°C for 24 hours, and set aside.

Embodiment 2

[0049] Alkylation desulfurization test:

[0050] In a stirred high-pressure reactor, add 150 grams of naphtha raw materials with a boiling point range of 62-210 ° C, complexed with Fe 3+ 0.48 g of strong acidic cation exchange resin catalysts of ions were reacted for 1 minute at a temperature of 180° C. and a pressure of 6 atmospheres. The reaction products were separated by gas chromatography based on differences in boiling points. The sulfur content in the distillate was detected by a sulfur chemiluminescence detector, and the sulfur content of the gasoline component with a boiling point of 62-177° C. was 18.5 ppm.

Embodiment 3

[0052] Alkylation desulfurization test:

[0053] In a stirred autoclave, add 120 g of simulated gasoline components composed of octane, benzothiophene, and 2-methylbutene, the sulfur content of which is 850 ppm, and then add 0.56 g of complexed Fe 3+ The strongly acidic cation exchange resin of ions was reacted for 2 minutes at a stirring speed of 500 rpm, 204° C., and 10 atmospheric pressure. The reaction products were separated by gas chromatography based on differences in boiling points, and the sulfur content in the fractions was determined with a sulfur chemiluminescence detector. The sulfur content of components within the boiling range of gasoline at the boiling point is reduced to 15ppm.

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Abstract

The invention relates to a method for removing thiophene sulfur-containing compounds in gasoline, belongs to the field of petrochemical industry, and relates to an alkylation desulfurization method. The method of the present invention uses the cationic exchange resin complexed with Fe3+ ions as a catalyst to catalyze the alkylation reaction between the thiophene sulfur-containing compounds and olefins in the gasoline components to convert them into sulfur-containing compounds with higher boiling points. Based on differences in boiling points, hydrocarbons are separated by fractional distillation. The catalyst selected in the present invention is a composite catalyst with a complex structure, and Fe3+ ion and the active sulfonic acid group on the resin skeleton undergo a complex reaction to form a new active center, so that the acid catalytic activity of the resin is significantly enhanced. The alkylation has high selectivity, few side reactions, and high conversion rate, which is beneficial to improve the yield of product gasoline. In the method of the invention, the alkylation of sulfur compounds and the distillation separation of light hydrocarbon components can be carried out in the same reaction-distillation tower.

Description

Technical field: [0001] The invention belongs to the field of petrochemical industry and relates to a method for alkylation desulfurization of petroleum oil products. Background technique [0002] The development of modern industry requires oil refineries to provide more and more high-quality fuels. However, with the continuous increase in the processing of sulfur-containing crude oil and the widespread adoption of heavy oil catalytic cracking technology, the sulfur content of crude oil processing products including gasoline and diesel has increased significantly. . These sulfur-containing compounds produce a large amount of sulfur oxides after combustion, seriously polluting the human living environment. For this reason, industrially developed countries in the world have formulated more and more stringent quality standards for the sulfur content of various power fuels, especially gasoline and diesel oil. The "World Fuel Code" stipulates that the sulfur content of grade II...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02C10G29/00
Inventor 张成如冯绪胜
Owner 车春玲
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