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A method for efficient and selective catalytic oxidation desulfurization of diesel oil

A catalytic oxidation desulfurization, selective technology, applied in chemical instruments and methods, refining with oxygen-containing compounds, physical/chemical process catalysts, etc., can solve the problem of high oxygen-sulfur ratio, achieve low cost and reduce the use of oxidants , the effect of simple preparation method

Active Publication Date: 2021-06-25
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing catalytic oxidation desulfurization technology, there is often a good effect on the removal of thiophene (Th), benzothiophene (BT) or dibenzothiophene (DBT), which is obtained by consuming excess oxidant. In many literature reports, the oxygen-sulfur ratio remains high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of scandium-based phosphate nanocatalysts:

[0023] Add 20mL of ethanol and 0.19g of dodecylamine to the crystallization kettle and stir at room temperature for 1h, then slowly add an aqueous solution of 1.508g of scandium chloride and 1.035g of ammonium dihydrogen phosphate, stir well, crystallize at 180°C for 15d, and then cool naturally After reaching room temperature, the obtained solid was washed with deionized water to pH ≈ 7, treated with 0.25 mol / L hydrochloric acid, and dried at 90° C. to obtain a scandium-based phosphate nanocatalyst.

Embodiment 2

[0025] Add 20mL of ethanol and 0.24g of hexadecylamine to the crystallization kettle and stir at room temperature for 1h, then slowly add an aqueous solution of 1.508g of scandium chloride and 1.035g of ammonium dihydrogen phosphate, stir well, crystallize at 180°C for 15d, and then cool naturally After reaching room temperature, the obtained solid was washed with deionized water to pH ≈ 7, treated with 0.25 mol / L hydrochloric acid, and dried at 90° C. to obtain a scandium-based phosphate nanocatalyst.

Embodiment 3

[0027] Add 20mL of ethanol and 0.19g of dodecylamine to the crystallization kettle and stir at room temperature for 1h, then slowly add an aqueous solution of 1.508g of scandium chloride and 1.035g of ammonium dihydrogen phosphate, stir well, crystallize at 170°C for 20d, and then cool naturally After reaching room temperature, the obtained solid was washed with deionized water to pH ≈ 7, treated with 0.25 mol / L hydrochloric acid, and dried at 90° C. to obtain a scandium-based phosphate nanocatalyst.

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PUM

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Abstract

The invention relates to a high-efficiency catalytic oxidation desulfurization method for diesel oil. The scandium-based phosphate nanomaterial catalyst and an oxidant are contacted with diesel oil, and the second component is selectively catalyzed and oxidized by diesel under the condition that the first component competes for oxygen consumption; The diesel oil includes a first component and a second component; the first component includes one or more of olefins, aromatics or cycloalkanes; the second component is a sulfur compound, including mercaptans, sulfur One or more of ether, thiophene, benzothiophene, dibenzothiophene or 4,6-dimethyldibenzothiophene. The scandium nanomaterial catalyst prepared by the present invention can selectively remove macromolecular sulfur-containing compounds such as dibenzothiophene (DBT) in diesel oil under the condition of competitive oxidation of complex components such as olefins, cycloalkanes, and aromatics, and the desulfurization efficiency of diesel oil reaches 95.6% %, effectively reduces the amount of oxidant, and has a good application prospect in the field of oxidative desulfurization of diesel.

Description

technical field [0001] The invention belongs to the field of diesel oil desulfurization, relates to catalyst technology, in particular to a method for selective catalytic oxidation desulfurization of diesel oil. Background technique [0002] In recent years, the number of motor vehicles in my country has grown rapidly, and the emission of Sox and other pollutants from diesel vehicles is one of the important reasons for air pollution. my country has formulated extremely strict environmental protection laws and regulations. What is more urgent is that starting from 2019, the more stringent "National VI" emission standards will be gradually implemented across the country, forcing the upgrading of oil quality, and the emission of pollutants will be further stringent. Control. [0003] The oil desulfurization technology widely used in industry is hydrodesulfurization technology. However, fused-ring thiophene sulfides and their derivatives are difficult to remove under the conditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G27/04B01J27/18
CPCB01J27/18C10G27/04C10G2300/202
Inventor 姚月梅世铎吕树祥张乃才米国梁
Owner TIANJIN UNIV OF SCI & TECH