Method for removing sulfur by selectively catalytic oxidation of diesel oil

A selective catalytic oxidation and diesel oil technology, which is applied in the refining of oxygenated compounds, etc., can solve the problem of high cost of hydrodesulfurization, and achieve the effects of low cost, high yield of diesel oil and obvious effect

Inactive Publication Date: 2006-06-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is to provide a method for selective catalytic oxidation desulfurization of diesel oil, which overcomes the high cost of hydrodesulfurization in the past, the problem of non-hydrogenation desulfurization oxidant and the problem of wastewater treatment, and ensures the quality of diesel oil products in the refining process of diesel oxidation desulfurization and yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Press selective catalytic oxidation desulfurization catalyst boric acid and straight-run diesel oil mass ratio 2%, be 2217.2 μ g / g in sulfur content 40.5957g (50ml) mixed straight-run diesel oil (by Xi'an Petrochemical straight-run diesel oil 40% and Lanzhou straight-run diesel oil 60% In the high-pressure reaction kettle, the oxygen pressure in the kettle is 0.4MPa, the fixed and optimized stirring speed is N=700n / min, and the reaction is carried out at 140°C for 60min. After the reaction, the straight-run diesel oil and the co-catalyst are separated by cooling , The co-catalyst can be recovered by washing the diesel oil and recycled. According to the volume ratio of oil agent=5, get 2ml of compound extractant (80%DMF+20%C 2 h 5 OH) mixed with 10ml oxidized diesel oil, vibrated vigorously for a specified time, kept warm and separated phases, recovered the extractant in the lower layer for regeneration. Then take fresh extractant to extract the test oil, repeat this p...

example 2

[0029] According to selective catalytic oxidation desulfurization catalyst boric acid and straight-run diesel oil mass ratio 8%, in the 40.5676g (50ml) mixed straight-run diesel oil (composition is the same as example 1) that sulfur content is 2217.2 μ g / g, add boric acid, in autoclave , the oxygen pressure in the kettle is 0.2MPa, fixed and optimized stirring speed N=700n / min, reacted at 130°C for 60min, cooled and separated the straight-run diesel oil and co-catalyst after the reaction, and the co-catalyst can be recovered by washing the diesel oil for recycling. The oxidized diesel oil is successively extracted and adsorbed (the method is the same as in Example 1) to obtain refined straight-run diesel oil with a sulfur content of 1590 μg / g, a desulfurization rate of 28.3%, and a yield of desulfurized diesel oil of 95.5%. The acid value is 0.290 mgKOH / g.

example 3

[0031] Press catalyst zinc benzoate concentration 1500 μ g / g, selective catalytic oxidation desulfurization catalyst boric acid and straight-run diesel oil mass ratio 2%, be 2217.2 μ g / g in sulfur content 40.8297g (50ml) mixed straight-run diesel oil (composition is the same as example 1) , add zinc benzoate and boric acid, in the autoclave, the oxygen pressure in the autoclave is 0.4MPa, fixed and optimized stirring speed N=700n / min, react at 160°C for 60min, cool and separate straight-run diesel oil and catalyst benzoic acid after reaction Zinc, catalyst recycling. Diesel oil can be washed with water to recover boric acid for recycling. The oxidized diesel oil was successively extracted and adsorbed (the same method as in Example 1) to obtain refined straight-run diesel oil with a sulfur content of 730 μg / g, a desulfurization rate of 67.0%, and a yield of desulfurized diesel oil of 95.2%. The acid value is 0.50 mgKOH / g.

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Abstract

The invention relates a method for diesel oil selective catalytic oxidation desulfuration. The method comprising the steps of: (1) mixing catalyse zinc benzoate with diesel oil according to the concentration of 1400~2000ug / g; (2) add catalyst boracic acid and diesel oil to diesel oil with 1~10 mass %; (3) add the diesel oil mixed with the two catalyst into high-pressure autoclave; (4) feed oxygen and agitate under 130~180Deg. C for 20~150min, separate oxidation diesel oil and zinc benzoate after cooling, water scrubbing and reclaiming boracic acid; (5) use extracting agent with 60~90 mass % N, N-dimethyltoluamide and 10~40 mass % ethyl alcohol, under 20~80Deg. C, mix oxidation diesel oil and the extracting agent with volume ratio of 4~6, stewing phase-splitting; (6) use carclazyte adsorption processing extracting diesel oil and get the refining straight distillation diesel oil; (7) After distilling, the extracting agent phase can be reused.

Description

technical field [0001] The invention relates to a method for selective catalytic oxidation desulfurization of diesel oil. Background technique [0002] The organic sulfur compounds in diesel mainly include sulfide and thiophene, and the main pollutant after combustion is SO x , and for NO x , the formation of PM (particulate matter) has a promoting effect; the SO generated by the combustion of sulfide x It not only corrodes the combustion chamber and exhaust system of the engine, but also enters the crankcase through the gap of the piston ring, and generates sulfonic acid and various colloidal substances with the lubricating oil to accelerate the deterioration of the lubricating oil. The higher the sulfur content of the fuel, the more carbon deposits will be generated in the combustion chamber, which will increase the wear of the engine, resulting in a decrease in engine power and an increase in fuel consumption; sulfur compounds also poison the hydrodearomatization cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G27/04
Inventor 唐晓东崔盈贤
Owner SOUTHWEST PETROLEUM UNIV
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