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Low-grade diesel oil selective hydrogenation aromatic hydrocarbon removing method

A technology for hydrodearomatization and low-quality diesel oil, which is applied in the fields of hydrogenation refining of aromatics, petroleum industry, refined hydrocarbon oil, etc., and can solve the problem of poor selectivity of single-ring aromatics, so as to improve the selectivity of single-ring aromatics, high single-ring Aromatics yield and effect of improving process economy

Active Publication Date: 2016-01-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the poor selectivity of single-ring aromatics in the conventional hydrorefining process of high-aromatic diesel feedstock

Method used

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  • Low-grade diesel oil selective hydrogenation aromatic hydrocarbon removing method
  • Low-grade diesel oil selective hydrogenation aromatic hydrocarbon removing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The raw material oil A and the feed mixture of hydrogen enter the hydrofinishing reactor together, contact and react with the hydrofinishing catalyst A, and add ammonia gas to the feed mixture, based on the raw material oil A, its addition amount is 0.50% by weight, The reaction effluent enters the high-pressure separator for gas-liquid separation to obtain hydrogen-rich gas and hydrogenated oil. The reaction conditions are shown in Table 2, and the hydrocarbon composition of the hydrogenated oil is shown in Table 3.

[0057] As can be seen from Table 3, the removal rate of polycyclic aromatics in the hydrogenated oil is 80.4%, the removal rate of the total aromatics is 19.4%, and based on the hydrogenated oil, the content of single-ring aromatics is 54.3% by mass , the selectivity of single-ring aromatics is 64.4%, compared with the selectivity of single-ring aromatics in Comparative Example 1, it has increased by 38.5%. The nitrogen content in the hydrogenated oil wa...

Embodiment 2

[0059] The raw material oil A and the feed mixture of hydrogen enter the hydrofinishing reactor together, contact and react with the hydrofinishing catalyst B, add ammonia and pyridine to the raw material mixture, based on the raw material oil A, add The content of ammonia gas is 0.25% by weight, the content of added pyridine is 0.35% by weight, and the reaction effluent enters a high-pressure separator for gas-liquid separation to obtain hydrogen-rich gas and hydrogenated oil. The reaction conditions are shown in Table 2, and the hydrocarbon composition of the hydrogenated oil is shown in Table 3.

[0060] As can be seen from Table 3, the removal rate of polycyclic aromatics in the hydrogenated oil is 85.1%, the removal rate of the total aromatics is 18.6%, and based on the hydrogenated oil, the content of single-ring aromatics is 59.0% by mass , the selectivity of single-ring aromatics is 68.8%, compared with the selectivity of single-ring aromatics in Comparative Example 1,...

Embodiment 3

[0062] The raw material oil A and the feed mixture of hydrogen enter the hydrofinishing reactor together, contact and react with the hydrofinishing catalyst C, and add sec-butylamine to the feed mixture, based on the raw material oil A, its addition amount is 3.0% by weight , the reaction effluent enters the high-pressure separator for gas-liquid separation to obtain hydrogen-rich gas and hydrogenated oil. The reaction conditions are shown in Table 2, and the hydrocarbon composition of the hydrogenated oil is shown in Table 3.

[0063] As can be seen from Table 3, the removal rate of polycyclic aromatics in hydrogenated oil is 90.2%, the removal rate of total aromatics is 24.3%, and based on hydrogenated oil, the content of single-ring aromatics is 62.0% by mass , the selectivity of single-ring aromatics is 65.9%, compared with the selectivity of single-ring aromatics in Comparative Example 1, it has increased by 40.0%. The nitrogen content in the hydrogenated oil was 10 μg / g...

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Abstract

The invention relates to a low-grade diesel oil selective hydrogenation aromatic hydrocarbon removing method, which comprises that: diesel oil raw material oil and hydrogen are mixed to obtain a feeding mixture, the feeding mixture contacts a hydrorefining catalyst, reactions such as hydrodesulfurization, hydrodenitrogenation and selective hydrogenation aromatic hydrocarbon removing are performed under hydrogenation process conditions, and the reaction effluent is separated to obtain hydrogen rich gas and hydrogenated oil, wherein the nitride is added to the feeding mixture, the addition amount of the nitride is 0.001-10 wt% by adopting the diesel oil raw material oil as the reference, and the nitride is an inorganic nitride and / or organic nitride. According to the present invention, the single ring aromatic hydrocarbon selectivity of the hydrorefining process is significantly improved, the high quality raw material is provided for production of the high octane number gasoline or BTX components while the hydrogen consumption is reduced, and the process economy is easily improved.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for selectively hydrogenating and dearomatizing inferior diesel oil. Background technique [0002] Catalytic cracking diesel has a relatively high proportion in my country's diesel products and is the main secondary processed diesel component. With the deterioration and heaviness of crude oil, the quality of FCC diesel is deteriorating day by day, mainly manifested in the high content of impurities such as sulfur and nitrogen, and the high content of aromatics. In recent years, with the wide application of high-severity catalytic cracking technology such as catalytic cracking technology (MIP) that produces more isoparaffins, the content of aromatics, especially polycyclic aromatics, in MIP catalytically cracked diesel has further increased. [0003] Due to the increasingly stringent environmental regulations around the world, strict ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/00C10G45/02C10G45/44
Inventor 葛泮珠任亮刘清河高晓冬
Owner CHINA PETROLEUM & CHEM CORP
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