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Diesel oil catalytic oxidation desulfurization method

A catalytic oxidation desulfurization and diesel oil technology, which is applied in the fields of metal oxide refining, petroleum industry, refining hydrocarbon oil, etc., can solve problems such as difficulty in producing ultra-low sulfur diesel oil, difficulty in recovering organic acids, and reduction in desulfurization rate, and achieve good results. Industrial application prospect, significant oxidation effect, effect of moderate conditions

Inactive Publication Date: 2007-08-15
YANGZHOU UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

Although the oxidation effect is good and the desulfurization rate is high, the recovery of organic acids is difficult, which increases the cost, and a large amount of sulfur-containing wastewater is generated after oxidation, which is difficult to treat and expensive.
There is also a catalytic oxidation desulfurization method using air as an oxidant. Although the above problems are avoided, the desulfurization rate is reduced, and it is difficult to meet the needs of producing ultra-low sulfur diesel oil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] ZrOCl 2 ·8H 2 O solids were formulated with deionized water to contain ZrOCl 2 A solution with a concentration of 8% (weight), stirring and dropping ammonia water to pH = 9 to obtain a zirconium hydroxide wet gel, aging at room temperature, suction filtration, repeated washing with distilled water until there is no chloride ion, and drying at 110°C to obtain Zirconium hydroxide xerogel is the catalyst carrier. After crushing and grinding, the obtained zirconium hydroxide xerogel powder was added with 0.25M H 2 WO 5 In the impregnating solution, the obtained suspension is continuously stirred to form a solid, then filtered, washed with distilled water, dried at 80°C, and then roasted at 700°C to obtain WO 3 / ZrO 2 catalyst.

[0023] In a 250ml three-necked flask, add 200ml of mixed straight-run diesel oil with a sulfur content of 1730 μg / g, 20ml of 30% (weight) hydrogen peroxide aqueous solution and 1.5g of self-made catalyst, and stir and react at 60°C for 60min. ...

Embodiment 2

[0026] In the 250ml there-necked flask, add 200ml sulfur content and be the mixed straight-run diesel oil of 1730 μ g / g, 40ml 30% (weight) hydrogen peroxide aqueous solution and 1.5g self-made catalyst, all the other operations and extraction process are with example 1, obtain sulfur content and be 171 μ g / g g of diesel oil, the desulfurization rate is 90.1%.

Embodiment 3

[0028] The raw diesel oil catalytic oxidation reaction and the initial extraction process were the same as in Example 1, and the above extraction process was repeated three times by adding fresh extractant to obtain diesel oil with a sulfur content of 165 μg / g and a desulfurization rate of 90.5%.

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PUM

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Abstract

The invention discloses a diesel catalytic oxidation desulfurizing method, which comprises the following steps: (1) allocating ZrOCl2.8H2O solid to solution; producing zirconium hydroxide wet gel; aging; suctioning; washing with distilled water repeatedly until without chloride ion; drying; getting zirconium hydroxide xerogel; (2) grinding; adding into H2WO5 steeping liquor; stirring; generating solid; filtering; washing; drying; roasting; producing WO3 / ZrO2 activator; (3) adding oxidant and WO3 / ZrO2 activator into sulfur diesel; proceeding catalytic oxidation desulfurizing react; cooling; separating diesel and activator; (4) adding N, N-dimethyl formamide extractant into the diesel; mixing completely under the function of horsepower supersonic; stewing; layering; getting the end product. This invention possesses advanced craft, simple flow path, cheap cost and good desulfurizing effect, which structural property is stable and usage is smaller.

Description

technical field [0001] The invention relates to a method for catalytic oxidation desulfurization of diesel oil in petroleum refining process. Background technique [0002] With the increasing awareness of global environmental protection, the production of clean fuels has become an inevitable trend of development. Therefore, in the face of increasingly stringent restrictions on diesel sulfur content and the huge market demand for low-sulfur clean diesel, the improvement and innovation of diesel desulfurization methods have very important practical significance. [0003] Hydrodesulfurization is mostly used in industrial production at home and abroad. Hydrodesulfurization refers to the conversion of organic sulfides in diesel oil into hydrogen sulfide and removal of hydrogen sulfide through catalyst action in the presence of hydrogen. This method has harsh reaction conditions, large investment and high operating costs, and it is difficult to remove dibenzothiophene organic sul...

Claims

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Application Information

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IPC IPC(8): C10G27/00C10G29/16
Inventor 张存马春艳
Owner YANGZHOU UNIV
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