Method for mixed production of light-weight aromatic hydrocarbon by use of catalytic cracking diesel 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., can solve the problems of small-scale equipment and unobvious economic benefits, and achieve good activity stability and adaptability of raw materials Good performance and reduce the difficulty of hydrofining

Active Publication Date: 2014-07-02
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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  • Method for mixed production of light-weight aromatic hydrocarbon by use of catalytic cracking diesel and C10&lt;+&gt; distillate oil
  • Method for mixed production of light-weight aromatic hydrocarbon by use of catalytic cracking diesel and C10&lt;+&gt; distillate oil
  • Method for mixed production of light-weight aromatic hydrocarbon by use of catalytic cracking diesel and C10&lt;+&gt; distillate oil

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Experimental program
Comparison scheme
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 mixed production of light-weight aromatic hydrocarbon by use of catalytic cracking diesel and C10<+> distillate oil. The method comprises the following steps: firstly mixing the catalytic cracking diesel and the C10<+> distillate oil with hydrogen, performing a hydrofining reaction to remove sulfur and nitrogen, saturate olefin and appropriately saturate aromatic hydrocarbon; then, extracting a hydrofining product by using an extraction solvent to obtain extract oil containing rich aromatic hydrocarbon and raffinate oil containing rich alkane; using the raffinate oil as a clean diesel oil concoction component, and performing rectification separation on the extract oil to obtain aromatic hydrocarbon extract oil; performing a hydrocracking reaction on the aromatic hydrocarbon extract oil, performing cutting separation on a hydrocracking product, using a distillate oil product greater than 195 DEG C as the clean diesel oil concoction component, feeding the distillate oil product smaller than 195 DEG C as an aromatic hydrocarbon raw material into an aromatic hydrocarbon treatment device to obtain a light-weight aromatic hydrocarbon product and a clean gasoline concoction component. By adopting the method provided by the invention, the yield of the light-weight aromatic hydrocarbon is increased, and meanwhile high-quality clean fuel oil is obtained and the high additional value utilization of the C10<+> distillate oil is achieved.

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 Applications(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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