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
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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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