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Cut-fracted oil oxidation desulfurizing method

A technology for oxidative desulfurization and distillate oil, which is applied in the direction of refining with oxygenated compounds, and can solve the problems of high cost, unsafe operation and environmental protection, and low mass transfer efficiency.

Active Publication Date: 2006-08-09
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

The disadvantage of this scheme is that the mass transfer efficiency of a series of continuous stirring reactors is low (a series of reactors is required to meet the high reaction speed of hydrogen peroxide-diesel oxidative desulfurization, thereby requiring high mixing efficiency), and the second is to remove the oil phase The residual acid in the acid should be washed with alkali to produce alkali residue that pollutes the environment and requires high cost for harmless treatment. Third, when the acid phase is separated from the sulfone, hot gas oil should be used to dissolve the sulfone, thereby converting the high-value gas oil into become a low-value sulfone-containing coking feedstock or pitch blending component
The use of ultrasound requires special equipment, and there are certain unsafe factors in terms of operation and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0035] This example proves that the use of reaction equipment with high mass transfer efficiency can significantly improve the desulfurization efficiency. Experimental process and experimental raw material are the same as comparative example 1~3, just react in with figure 2 It is carried out in an impingement flow reactor with the same structure, using two propellers, the propeller speed is 900 rpm, batch operation, and the reaction temperature is lowered to 70°C. The reaction raw material oils of Examples 1-3 correspond to Comparative Examples 1-3 respectively. The sulfur content analysis data of the reaction products are also listed in Table 1.

[0036] example

[0037] Apparently, under the same raw materials and other reaction conditions, using an impingement flow reactor with higher mass transfer efficiency can significantly increase the desulfurization rate of the oxidation reaction, and the reaction temperature can also be greatly reduced.

Embodiment 4

[0039] Embodiment 4 is according to embodiment 1 process, and reaction temperature is 75 ℃, and reaction time is 3 minutes, and the results are shown in Table 2. Compared with Comparative Example 1, when a similar desulfurization rate is achieved, the impingement flow reactor needs a shorter reaction time and a lower reaction temperature. And compared with Comparative Example 1, the diesel yield increased by 0.1 wt%.

Embodiment 5

[0041] Embodiment 5 is by embodiment 1 process, and reaction temperature is 70 ℃, and reaction time is 10 minutes, and hydrogen peroxide addition is 2.5 times of theoretical requirement, and the results are shown in Table 2. Compared with Comparative Example 1, to achieve similar desulfurization rate, impinging flow reactor requires less oxidant amount and lower reaction temperature.

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Abstract

This invention discloses an oxidizing and desulfurizing method for fraction oil, which includes that a fraction oil raw material and hydrogen peroxide are reacted in a high effective mass transfer reactor with intensified onflow internal components, such as an impact flow reactor, the reactants in it can be mixed fully in short time and the reaction efficiency is increased obviously since the effective collision among molecules arises quick reaction and the reaction condition is more relax than ordinary beat up reactors when the same desulfurized result is got.

Description

technical field [0001] The invention relates to a method for oxidative desulfurization of distillate oil, in particular to a method for producing clean fuel by oxidative desulfurization of distillate oil containing sulfur. Background technique [0002] Organosulfur compounds in fuel oil are hazardous substances. Combustion produces SO X Lead to the formation of acid rain, causing environmental pollution and damage to human health. For vehicle fuel, SO X For HC, CO, especially NO in automobile exhaust X And PM emissions have a significant role in promoting, resulting in an increase in pollution emissions. SO X It will also corrode the engine and reduce the life of the engine. In view of the hazards of sulfur in vehicle fuel oil, many countries and regions in the world have promulgated more stringent diesel standards. Faced with strict restrictions on the sulfur content of gasoline and diesel and the huge market demand for low-sulfur clean diesel, countries all over the...

Claims

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Application Information

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IPC IPC(8): C10G27/12
Inventor 黎元生王海波勾连科
Owner CHINA PETROLEUM & CHEM CORP
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