Process of catalyzing oxidizing desulfating for straight distillation diesel oil

A technology for catalytic oxidative desulfurization and straight-run diesel oil, which is applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problem of high cost, and achieve the effects of short reaction time, shortened oxidation reaction time, high desulfurization rate and yield

Active Publication Date: 2008-05-07
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After washing with sodium hydroxide solution, the sulfide is removed by silica gel or aluminum glue, and the main problems are: H 2 o 2 The cost is too high, and the use of recycling organic sulfur is developed

Method used

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  • Process of catalyzing oxidizing desulfating for straight distillation diesel oil
  • Process of catalyzing oxidizing desulfating for straight distillation diesel oil
  • Process of catalyzing oxidizing desulfating for straight distillation diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Straight-run diesel desulfurization experiment using a stirred reactor

[0039] Adopt stirring reactor: add 300ml straight-run diesel oil (LH) in 500ml three-necked flask, the raw material sulfur content of straight-run diesel oil is 2273ppm, heat in constant temperature water bath; ) into a three-necked flask rapidly, the diesel catalyst ratio is 100:40, stirred with a stirrer at a fixed speed, and the catalytic oxidation reaction is carried out in a closed system. The reaction temperature is 60°C, the reaction pressure is normal pressure; the reaction residence time is 3, 5, 10 and 30 minutes respectively, and the stirring is stopped after reaching the reaction residence time. Pour the mixed solution into a separatory funnel and let it stand for phase separation. The separated oxidized diesel oil is extracted and desulfurized with an extractant (dimethylformamide). Oxygenated diesel oil: extractant = 2.5:1, the sulfur content of diesel oil after desulfuriz...

Embodiment 2

[0043] Example 2: Experiment of desulfurization of straight-run diesel oil using a combined reactor.

[0044] According to the process flow and equipment shown in accompanying drawing 1: the reactor adopts the specification of SK-5 / 10 static mixer and tailpipe.

[0045] The reactor is a combined reactor with static mixer and material circulation. The key function of the static mixer is to ensure that the fluid in the static mixer has a good mixing state (in the complete turbulence zone). In order to flexibly adjust the two parameters of flow state and residence time, ensure the oxidation reaction effect of the reaction system, and improve the desulfurization rate, the pilot plant adopts a partial cycle reaction process, that is, part of the oxidized diesel oil separated from the separator returns to the static state. mixer. Using this process, firstly, when the amount of feed in the pilot test is relatively small, the increase of circulating diesel effectively ensures that th...

Embodiment 3

[0061] The reactor is a stirred reactor, and the straight-run diesel oil (HH) is used for the catalytic oxidation reaction, and then the oxidized straight-run diesel oil is screened for the test of catalytic oxidation desulfurization extraction. The experimental test oil consumption of each extractant is 20ml, the diesel catalyst (nitric acid) ratio is 100:10, the catalytic oxidation reaction temperature is 60°C, the catalytic oxidation reaction time is 5min, and the raw material oil (HH)-catalyst phase separation time is 5min; catalytic oxidation After the diesel phase is extracted by extractant, extractant: raw oil (volume ratio)=1:5, extraction temperature is 30°C, extraction time is 3min, extraction times is 5 times, extraction phase separation temperature is 30°C, extraction phase separation time is 5min; The phase was washed with water and neutralized, coalesced and filtered. The results after extraction are shown in Table 5.

[0062] Table 5 The influence of different ...

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Abstract

The invention relates to desulfurating method for the straight-run diesel oil by the oxidation. The nitrate acid which is 35-70%wt is the oxidant the volume ration of the straight-run diesel oil and the oxidant is 100:5-50. The reaction temperature is 40-80DEG C and the time is 1-30min. The oxidant after reaction can be recovered. The diesel oil product can be got after the extraction, the filtering and adsorption. The processes can desulphurate and deacidification at the same time, so it has the low cost according to the hydrotreating for the FCC diesel oil and the devulcanization by the H2O2.

Description

technical field [0001] The invention relates to a method for desulfurizing straight-run diesel oil, more specifically a method for catalytic oxidation desulfurization of straight-run diesel oil. Background technique [0002] At present, the problem of air pollution caused by automobile exhaust is becoming more and more serious. The main pollution source of the top ten most polluted cities in the world is automobile exhaust. It has become a top priority to solve automobile exhaust pollution from the source and produce clean oil products. Research shows that sulfur-containing fuels promote HC, CO, NO x and PM emissions. The sulfur content of diesel has a great impact on exhaust emissions, especially for NO emissions x And PM has obvious promotion effect. At the same time, the presence of sulfur also affects the efficiency of diesel catalytic aftertreatment devices. Therefore, under the impetus of global environmental protection awareness and environmental protection legisl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G27/00
Inventor 李吉春申建华王洛飞唐晓东林泰明李金阳沈治城薛英芝晃世海张瑞平马玉华彭蓉
Owner PETROCHINA CO LTD
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