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Diesel oil fraction hydrogenating modification process

A hydrogenation upgrading and fractionation technology, which is applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of difficult operation, complex structure of countercurrent reactor, and high investment cost, and achieve high volumetric space velocity, low operating cost, and reduced Effect of PAH content

Active Publication Date: 2011-06-15
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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Problems solved by technology

This method can effectively reduce the sulfur content and aromatics content in the raw material and avoid the influence of hydrogen sulfide and other gaseous impurities on the deep desulfurization reaction and aromatics saturation reaction, but the countercurrent reactor mentioned in this method has complex structure, high investment cost and difficult operation. High difficulty

Method used

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  • Diesel oil fraction hydrogenating modification process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw material oil A enters the hydrogenation reactor together with the hydrogen, and reacts with the hydrogenation catalyst D. The effluent after the reaction is cooled and separated, and the hydrogen-rich gas is recycled. The liquid product enters the fractionation system and is separated into a diesel fraction and a small amount of naphtha fraction. , the reaction conditions are shown in Table 2, and the product yield and properties are shown in Table 3.

[0031] As can be seen from Table 3, the yield of the diesel fraction product is 95.3% by weight, and the cetane number is 33.4. Compared with the raw material, the cetane number increases by 12.7 units, and the density is 0.8733g / cm 3 , compared with the raw material, the density of the product decreases by 0.0435g / cm 3 , and the polycyclic aromatic hydrocarbon content of the diesel product is only 5.0% by weight, and the sulfur content is <10μg / g.

Embodiment 2

[0033] The raw material oil B enters the hydrogenation reactor together with the hydrogen, and reacts with the hydrogenation catalyst D. The effluent after the reaction is cooled and separated, and the hydrogen-rich gas is recycled. The liquid product enters the fractionation system and is separated into a diesel fraction and a small amount of naphtha fraction. , the reaction conditions are shown in Table 2, and the product yield and properties are shown in Table 3.

[0034] As can be seen from Table 3, the yield of the diesel fraction product is 95.6% by weight, and the cetane number is 44.6. Compared with the raw material, the cetane number increases by 13.6 units, and the density is 0.8465g / cm 3 , compared with the raw material, the density of the product decreases by 0.0454g / cm 3 , and the content of polycyclic aromatic hydrocarbons in diesel products is only 2.8% by weight, and the sulfur content is less than 10 μg / g.

Embodiment 3

[0036] The raw material oil B enters the hydrogenation reactor together with the hydrogen, and successively contacts and reacts with the hydrofinishing catalyst E and the hydrotreating catalyst D without intermediate separation (the loading volume ratio of the hydrofinishing catalyst E and the hydrotreating catalyst D is 1 : 1), the effluent after the reaction is cooled and separated, the hydrogen-rich gas is recycled, and the liquid product enters the fractionation system to be separated into a diesel fraction and a small amount of naphtha fraction. The reaction conditions are as shown in Table 2, and the product yield and properties are as shown in Table 3 shown.

[0037] As can be seen from Table 3, the yield of the diesel fraction product is 96.0% by weight, and the cetane number is 46.0. Compared with the raw material, the cetane number increases by 15.0 units, and the density is 0.8459g / cm 3 , compared with the raw material, the density of the product decreases by 0.046g...

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Abstract

The diesel oil fraction hydrogenating modification process includes the contact of the mixture of material oil and hydrogen with the hydrotreating catalyst or the contact of the mixture of material oil and hydrogen with the hydrorefining catalyst and the hydrotreating catalyst successively, cooling and separating the reacted effluent, reusing the hydrogen-rich gas circularly, and fractionating the liquid product in the fractionating system to obtain diesel oil fraction and naphtha fraction. The process makes it possible to process inferior diesel oil fraction with banal boiling point in mild operation condition and can raise the cetane number greatly, lower the content of polycyclic aromatic hydrocarbon, S and N and reduce the density. In addition the process has high volume space velocity, low operation cost and high product yield.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, it belongs to a method for hydrogenation and upgrading of diesel fractions. Background technique [0002] With the strengthening of people's awareness of environmental protection, countries around the world have increasingly strict requirements on the content of impurities such as sulfur and nitrogen in diesel products, as well as the content of aromatics and cetane number. China's fuel oil standards are also constantly improving. The three major cities of Beijing, Shanghai and Guangzhou have taken the lead in implementing Euro III emission standards since 2005, which require that the sulfur content of diesel oil is not more than 0.035% by weight and the cetane number is not less than 51. The content of polycyclic aromatic hydrocarbons is not more than 11% by weight. Therefore, reducing the sulfur and nitrogen content of diesel fractions, inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/12
Inventor 张毓莹胡志海蒋东红卫剑辛靖聂红
Owner CHINA PETROLEUM & CHEM CORP
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