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Preparation method of super low sulfur diesel oil

A technology of ultra-low-sulfur diesel oil and diesel oil, which is applied in the field of preparation of ultra-low-sulfur diesel oil, can solve the problems of oil desulfurization efficiency, oil quality to be improved, production cost reduction, and high processing cost, so as to prevent oil quality from being affected, Ease of recycling and reduction in operating costs

Inactive Publication Date: 2004-10-06
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 benzthiophene, dibenzthiophene and their derivatives
1. The oxidation activity and selectivity of oxidants to sulfides need to be improved, and the oxidation temperature needs to be lowered
2. The operation process needs to be simplified and the production cost needs to be reduced
3. Oil desulfurization efficiency and oil quality need to be improved
4. Environmentally unfriendly operation process needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Catalyst [(C 18 h 37 ) 2 N + (CH 3 ) 2 ][PW 12 o 40 ] preparation.

[0044] As an illustrative example, the catalyst [(C 18 h 37 ) 2 N + (CH 3 ) 2 ][PW 12 o 40 ] can be prepared as follows: add 3.05 g of dioctadecyldimethylamine chloride into a beaker filled with 150 ml of deionized water and heat to 30 ° C. gram of dodecaphosphotungstic acid in 10ml aqueous solution, a white precipitate was formed immediately. After continuous stirring for 3-4 hours, a white solid (6.7 g) was obtained by filtration, washing with deionized water, and vacuum drying, with a yield of 85%. The catalyst is represented by A.

Embodiment 2

[0046] (1) Take 50ml of hydrotreated diesel oil with a sulfur content of 526ppm in a conical flask, add 0.08g of catalyst A and heat up to 40°C, stir vigorously for 30 minutes, cool down to 30°C after the catalyst dissolves, add 0.8ml of peroxide Hydrogen (30%), stirred vigorously for 10 hours, cooled to room temperature.

[0047] (2) The above-mentioned treated diesel oil is centrifuged to recover the catalyst.

[0048] (3) Add 13ml of 5% sodium thiosulfate solution to the diesel oil treated in the above step 2, stir for 30 minutes, remove the lower aqueous solution with a separatory funnel, wash with water three times (50ml each time), and use 10 grams of water and sodium sulfate to dry.

[0049] (4) Extract the dry diesel oil with 50 ml of pyrrolidone, and separate the pyrrolidone in the lower layer.

[0050] (5) the diesel oil that step 4 obtains is passed through an adsorption column that the activated carbon of 1 gram of adsorbent is housed. The sulfur content of the ...

Embodiment 3

[0052] Same as Example 2, except that the reaction temperature is 40° C., the reaction time is 8 hours, and the reducing agent is sodium sulfite. The sulfur content of the obtained diesel oil was determined by microcoulomb titration, and the results are listed in Table 1.

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PUM

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Abstract

A process for preparing ultralow-sulfur diesel oil includes mixing refined low-sulfur diesel oil with phase-transfer catalyst and aqueous solution of hydrogen peroxide, stirring, reaction for converting the organic sulfide to sulfone and / or sulfoxide, recovering phase-transfer catalyst, removing excessive hydrogen peroxide, selectively removing sulfone and / or sulfoxide by polar solvent, and adsorption. The final sulfur content is lower than 10 ppm (even up to 0 ppm).

Description

technical field [0001] The invention relates to a preparation method of ultra-low sulfur diesel oil. Background technique [0002] Distillate oil refining is an essential and important process in petrochemical industry. Its purpose is to remove organic sulfur compounds and organic nitrogen compounds contained in raw oil to meet the requirements 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 refining. 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. must also be built. 2. Due to the high temperature and high pressure hydrogen consumption involved i...

Claims

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Application Information

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IPC IPC(8): C10G53/08
Inventor 李灿蒋宗轩高金波杨永兴田福平孙秀萍应品良
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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