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Method for producing light arene product and clean fuel oil product from catalytic cracking diesel oil

A technology for catalytic cracking of diesel oil and light aromatics, which is applied in the fields of hydrocarbon oil cracking, petroleum industry, and hydrocarbon oil treatment. It can solve problems such as difficulty in meeting clean fuel quality requirements, high content of sulfur and nitrogen compounds, and large loss of extraction solvents. Achieve the effects of long operating period of the device, good activity stability, and good adaptability of raw materials

Active Publication Date: 2015-05-27
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can produce diesel oil with high cetane number and high-octane gasoline by-product while obtaining light aromatics. Cracked diesel oil contains a large amount of olefin compounds, and the presence of compounds such as sulfur and nitrogen will inevitably lead to a large loss of extraction solvent and poor extraction effect
If the obtained raffinate is not hydrorefined, the content of sulfur and nitrogen compounds is high, and it is difficult to meet the quality requirements of clean fuels

Method used

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  • Method for producing light arene product and clean fuel oil product from catalytic cracking diesel oil
  • Method for producing light arene product and clean fuel oil product from catalytic cracking diesel oil
  • Method for producing light arene product and clean fuel oil product from catalytic cracking diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] According to the method of the invention, catalytic cracking diesel oil is processed to produce light aromatics and clean fuel oil products.

[0060] Catalytically cracked diesel oil is used as raw material to enter the second-stage hydrofinishing reactor of the two-stage hydrocracking-hydrofinishing high-pressure hydrogenation unit in series. The hydrorefining catalyst loading volume of the hydrofinishing section is 200mL, and the hydrocracking catalyst loading volume of the hydrocracking section is 80mL. The hydrorefining product is cut by a continuous distillation unit, and the >355°C distillate oil enters the first stage hydrocracking reactor of the two-stage hydrocracking-hydrofinishing high-pressure hydrogenation device in series, and then passes through the second stage hydrorefining reactor. The reaction temperature is 380°C, the hydrogen partial pressure is 5.5MPa, and the mass space velocity of fresh FCC diesel in the hydrofining section is 1.0h -1 , the hyd...

Embodiment 2～5

[0067]The FCC diesel oil was processed sequentially according to the method steps of Example 1, the difference being the selection of reaction conditions and the amount of extraction solvent, the selected test conditions are shown in Table 2.

[0068] The properties of different distillate oil products are shown in Table 3 to Table 5, and the yields of different distillate oil products are shown in Table 6.

[0069] Table 2 Test conditions

[0070]

[0071] Table 3 Properties of extracted oil distillate

[0072] project

Example 1

Example 2

Example 3

Example 4

Example 5

Density (20℃), g / cm 3

0.885

0.881

0.862

0.869

0.886

Sulfur content, μg / g

7

6

6

5

6

Nitrogen content, μg / g

8

9

8

8

7

Aromatics, mass%

93.2

93.4

90.8

91.5

93.6

Polycyclic aromatic hydrocarbons, mass%

10.1

9.4

8.2

8.1

10.3

[0073] Table 4 ...

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Abstract

The invention discloses a method for producing a light arene product and a clean fuel oil product from catalytic cracking diesel oil. The method is characterized by comprising the following steps: (1) mixing the catalytic cracking diesel oil with hydrogen, mixing with a cracking product and simultaneously performing a hydro-refining reaction so as to remove sulfur and nitrogen impurities, and performing an olefin saturation process and an arene hydrogenation saturation process; (2) catalyzing distillate oil of the diesel oil for cutting after the hydro-refining process is finished, wherein the distillate oil at a temperature greater than 355 DEG C is returned for hydrocracking after being mixed with the hydrogen; (3) extracting the cut distillate oil to obtain extract oil rich in poly-aromatic hydrocarbon and raffinate oil rich in alkane; (4) taking the raffinate oil rich in alkane as a clean diesel oil blending component; (6) cutting and separating an extract oil hydro-cracking product, wherein the distillate oil at a temperature greater than 195 DEG C is taken as the clean diesel oil blending component, and the distillate oil at a temperature less than195 DEG C is utilized to obtain the light arene product and the clean gaseous blending component.

Description

technical field [0001] The invention relates to the technical field of petroleum catalytic cracking, in particular to a method for producing light aromatics and clean fuel oil products by utilizing catalytic cracking diesel oil. Background technique [0002] Under the situation of developing low-carbon economy, circular economy and realizing sustainable development, the pace of upgrading the quality of oil products in China has been significantly accelerated, and the requirements for the content of aromatics in diesel are becoming more and more stringent. The production of clean oil products has become one of the key points in the development of China's oil refining industry. In China's diesel composition, 25-30% is FCC diesel. FCC diesel has the characteristics of high aromatics content (aromatics content > 60%), low cetane number, and its quality is poor. The cost of hydrogen upgrading operation is high, the conditions are harsh, and the increase of cetane number is l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/04C10G47/20
Inventor 南军于海斌臧甲忠张景成范景新裴仁彦刘艳隋芝宇王庆波吴青
Owner CHINA NAT OFFSHORE OIL CORP
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