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Method for preparing desulfurized diesel oil

A technology for diesel and hydrogen diesel, which is applied in the field of preparation of desulfurized diesel, can solve the problems of high processing cost, large investment, difficulty in removing thiophene sulfides, etc., and achieves the effect of lowering operating costs and lowering production costs.

Inactive Publication Date: 2009-05-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional hydrofining process is effective, there are still many problems as follows: 1. Large investment; in addition to building high-temperature and high-pressure treatment equipment, hydrogen production equipment (if there is no hydrogen reforming), sulfur recovery equipment, etc.
2. Due to the high temperature and high pressure hydrogen consumption involved in the processing process, the processing cost is relatively high; 3. Due to the generation of highly toxic hydrogen sulfide during the processing process, it will inevitably cause environmental pollution
4. Hydrofining can effectively remove non-thiophene sulfides in diesel oil, but it is very difficult to remove thiophene sulfides, especially benzothiophene, dibenzothiophene and their derivatives
Since the catalyst can only handle low-concentration (sulfur content ≤ 1000ppm) pre-hydrogenated diesel, it is difficult to remove a large amount of sulfur in high-concentration pre-hydrogenated diesel and non-hydrogenated diesel, so there are great defects. to be further improved

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0030] The preparation of Na-W catalyst among the present invention:

[0031] a. Dissolve 0.10g of NaCl crystals in 30ml of 0.1mol / L dilute nitric acid, add 3.30g of NaCl with stirring 2 WO 4 2H 2 20ml of aqueous solution of O crystals.

[0032] b. Then add 0.32 g of cetyltrimethylammonium chloride, continue to stir for 12 hours, and then filter. The filter cake can be directly used for catalytic reaction or dried in a vacuum oven at 60°C. It weighed 2.3 g after drying, and the yield was 98%. The catalyst is represented by A.

Embodiment 2

[0034] The preparation of Mg-W catalyst among the present invention:

[0035] a. Add 0.225gMg(NO 3 ) 2 ·6H 2 O crystals were dissolved in 30ml 0.1mol / L dilute nitric acid, and 3.30g Na 2 WO 4 2H 2 20ml of aqueous solution of O crystals.

[0036] b. Then add 0.296g of dodecyltrimethylammonium chloride, continue to stir for 12 hours, and then filter. The filter cake can be directly used for catalytic reaction, or placed in a vacuum oven at 60°C for drying. It weighed 2.1 g after drying, and the yield was 97%. The catalyst is denoted by B.

Embodiment 3

[0038] The preparation of Al-W catalyst among the present invention:

[0039] a. Add 0.375gAl(NO 3 ) 3 9H 2 O crystals were dissolved in 30ml 0.1mol / L dilute nitric acid, and 3.30g Na 2 WO 4 2H 2 20ml of aqueous solution of O crystals.

[0040] b. Then add 0.296g of dodecyltrimethylammonium chloride, continue to stir for 12 hours, and then filter. The filter cake can be directly used for catalytic reaction, or placed in a vacuum oven at 60°C for drying. It weighed 2.1 g after drying, and the yield was 97%. The catalyst is denoted by C.

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Abstract

This invention discloses a method for preparing low-sulfur diesel oil (sulfur content is less than 50 ppm). The method comprises: (1) stirring hydrogenated or unhydrogenated diesel oil and a mixture of Q+[MWxOy]- emulsion catalyst and H2O2 aqueous solution, and reacting under mild conditions to convert organic sulfide in diesel oil into sulfone and / or sulfoxide to obtain oxidized diesel oil; (2) separating the catalyst from oxidized diesel oil, and recovering; (3) washing oxidized diesel oil with distilled water, and removing most of sulfone and / or sulfoxide with a polar solvent to obtain low-sulfur diesel oil (sulfur content is less than 50 ppm).

Description

technical field [0001] The invention relates to a preparation method of desulfurized diesel oil. Background technique [0002] SO produced by the combustion of organic sulfur compounds in fuel oil x Not only can it cause acid rain, but it can also cause irreversible poisoning of the three-way catalyst of the automobile engine exhaust gas purification system, so it has attracted widespread attention. The refining of distillate oil is an essential and important process in petrochemical industry, which is to remove organic sulfides and organic nitrogen compounds in fuel oil to meet the needs of environmental protection. The traditional refining process is hydrofining, which converts organic sulfides and organic nitrogen compounds into hydrogen sulfide and ammonia through hydrogenation, so as to achieve the purpose of removing sulfur and nitrogen. Although the traditional hydrofining process is effective, there are still many problems as follows: 1. Large investment; in additi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G27/12
Inventor 李灿景飞吕宏缨蒋宗轩
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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