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Process for catalyzing oxygenizing desulfurizing diesel oil

A technology for catalytic oxidative desulfurization and diesel oil, which is applied in the direction of multi-stage series refining process treatment, etc., can solve the problems of high operating cost, difficult treatment, harsh reaction conditions, etc., and achieves low cost, obvious effect, and small dosage.

Inactive Publication Date: 2006-03-01
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has good oil quality and high product yield, it has the following problems: the reaction conditions are very harsh, generally requiring an operating pressure of 4.0MPa and a temperature of 320-370°C, and the high-pressure method even requires a pressure of 10MPa; investment in hydrogenation equipment Large, high operating costs, resulting in a substantial increase in diesel costs
Although its oxidation effect is better and the desulfurization rate is higher, the oxidant H 2 o 2 The price is high, the dosage is large, and regeneration is difficult; and after oxidation, a large amount of sulfur-containing wastewater is produced, which is difficult to treat and the treatment cost is also high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] According to the catalyst dosage of 2400μg / g, 16.612g of mixed straight-run diesel oil with a sulfur content of 1658μg / g produced in Lanzhou Petrochemical Company (mixed crude oil composed of 40% of Beijiang crude oil, 47% of Nanjiang crude oil and 13% of Tuha crude oil was processed into), add 0.033g of zinc oxalate, use air as the oxidant, react at 150°C±3°C for 60min, cool and separate the diesel and the catalyst after the reaction, and the catalyst is recycled. According to the volume ratio of oil agent=5, get 4ml of extractant (60% by weight DMF+40% by weight ethanol) and oxidized diesel oil and mix it vigorously for a specified time, keep it warm and separate phases, and recover the lower layer of extractant to regenerate. Then take fresh extractant to extract the test oil, and repeat this four times to obtain refined straight-run diesel oil with a sulfur content of 423 μg / g and a desulfurization rate of 74.48%.

example 2

[0025] According to the catalyst consumption of 2000 μg / g, add 0.033g of cobalt acetate to 16.612g of mixed straight-run diesel oil (composition is the same as Example 1) with a sulfur content of 1658μg / g produced by Lanzhou Petrochemical Company, and use air as an oxidant, at 150°C ± 3 React at ℃ for 60 minutes, after the reaction, cool and separate the diesel oil and the catalyst, and the catalyst can be recycled. The diesel oil was extracted according to the extraction method of Example 1 to obtain refined straight-run diesel oil with a sulfur content of 345 μg / g and a desulfurization rate of 79.19%.

example 3

[0027] Press catalyst consumption 1500 μ g / g, in the 16.612g mixed straight-run diesel oil (composition is the same as example 1) that the sulfur content that Lanzhou petrochemical company produces is 1658 μ g / g, add 0.033g copper acetate, diesel oil is oxidized by the method for example 1, The extraction operation yields refined straight-run diesel oil with a sulfur content of 545 μg / g and a desulfurization rate of 67.13%.

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PUM

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Abstract

A catalytic oxidizing technology for desulfurizing diesel oil includes such steps as proportionally mixing diesel oil with the catalyst chosen from oxalate and acetate of Co, Cu, Zn, benzoate of Co, Cu, Zn, Mn, Fe and Al, and phthalate of Mn, Zn and Cu, catalytic oxidizing reaction in air, cooling, separating catalyst from diesel oil, mixing diesel oil with extractant, laying aside, and separating upper oil phase from lower extractant phase.

Description

technical field [0001] The invention relates to a method for oxidizing and desulfurizing diesel oil in the petroleum refining process. 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 hydrodearomati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/14
Inventor 唐晓东刘亮
Owner SOUTHWEST PETROLEUM UNIV