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A method for producing light aromatics by mixing catalytic cracking diesel oil and C10+ distillate oil

A technology for catalytic cracking of diesel oil and light aromatics, which is applied in the fields of chemical instruments and methods, hydrogenation of hydrocarbons, hydrocarbons, etc. It can solve the problems of small equipment size and inconspicuous economic benefits, and achieve good activity stability and adaptability of raw materials The effect of good performance and long operation period of the device

Active Publication Date: 2016-01-20
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The above-mentioned distillate oil lightening technology is used to produce light aromatics, using noble metal system catalysts, the scale of the device is small, and the economic benefits are even less obvious

Method used

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  • A method for producing light aromatics by mixing catalytic cracking diesel oil and C10+ distillate oil
  • A method for producing light aromatics by mixing catalytic cracking diesel oil and C10+ distillate oil
  • A method for producing light aromatics by mixing catalytic cracking diesel oil and C10+ distillate oil

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Experimental program
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Effect test

Embodiment 1

[0058] Process the catalytic cracking diesel oil rich in aromatics, C by the inventive method 10 + Distillate oil, producing light aromatics and clean fuel oil products.

[0059] Catalytically cracked diesel oil, cracked C 10 + Distillate oil mixed feedstock (mass ratio 65:35) is feedstock oil, which is mixed with hydrogen and then sent to a fixed-bed high-pressure hydrogenation unit, with a loading capacity of 200mL of hydrofining catalyst. The reaction temperature is 360°C, the hydrogen partial pressure is 5.5MPa, and the mass space velocity of the raw material oil in the hydrofining section is 1.2h -1 , The hydrogen / oil volume ratio is 500:1.

[0060] Take the mass ratio of furfural and hydrorefined distillate oil as 1:1 for solvent extraction, take 500g of hydrorefined product and 500g of furfural into the separatory funnel, fully oscillate to mix evenly, and let it stand for stratification. Take the raffinate of the upper layer, its mass is 125g, add 125g of water th...

Embodiment 2～5

[0066] Press the method step of embodiment 1 successively to catalytic cracking diesel oil, C 10 + Distillate oil is processed, the difference is the ratio of raw materials, the selection of reaction conditions and the amount of extraction solvent, the selected test conditions are shown in Table 4.

[0067] FCC diesel and C 10 + Distillate mixed feedstock calculation, the properties of different distillate products are shown in Table 5 and Table 6, and the yields of different distillate products are shown in Table 7.

[0068] Table 4 Test conditions

[0069]

[0070] Table 5 Properties of clean diesel distillates

[0071] project Example 1 Example 2 Example 3 Example 4 Example 5 Density(20℃),g / cm 3 0.835 0.836 0.838 0.836 0.832 Sulfur content, μg / g 8 7 4 8 7 Nitrogen content, μg / g 7 6 5 7 8 Aromatics, wt% 19.8 22.5 18.3 18.5 20.4 PAHs, wt% 1.5 2.2 1.4 1.2 2.3 cetane number 46 45 47 47 46 ...

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Abstract

The invention relates to a method for producing light aromatics by mixing catalytic cracking diesel oil and C10+ distillate oil, comprising the following steps: firstly mixing catalytic cracking diesel oil, C10+ distillate oil and hydrogen, and then carrying out hydrofining reaction, carrying out sulfur and nitrogen removal, olefin Saturated and aromatics are properly saturated; then the hydrorefined product is extracted with an extraction solvent to obtain the extracted oil rich in aromatics and the raffinate oil rich in alkanes; the raffinated oil is used as a clean diesel blending component, and the extracted oil is passed through Rectification and separation to obtain aromatic hydrocarbon extract oil; the aromatic hydrocarbon extract oil is subjected to hydrocracking reaction, and the hydrocracked product is cut and separated, wherein the distillate oil product of >195°C is used as a clean diesel blending component; the distillate oil of <195°C As aromatics raw material, it enters the aromatics treatment unit to obtain light aromatics products and clean gasoline blending components. Through the method of the invention, while increasing the output of light aromatics, high-quality clean fuel oil is obtained, and high value-added utilization of C10+ distillate oil is realized.

Description

technical field [0001] The invention belongs to the preparation method of light aromatic hydrocarbons in the field of petroleum refining, and in particular relates to a method for utilizing catalytic cracking diesel oil and C 10 + Process for the production of light aromatics and clean fuel oils from distillates. Background technique [0002] Under the situation of developing low-carbon economy, circular economy and achieving sustainable development, the pace of upgrading the quality of oil products in my country 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 my country's oil refining industry. In my country'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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02C07C15/02C07C4/18C07C5/11
Inventor 于海斌南军臧甲忠张景成范景新肖寒刘艳隋芝宇王庆波吴青
Owner CHINA NAT OFFSHORE OIL CORP
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