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Method for combined treatment of catalytically cracked diesel and catalytically cracked diesel and system

A catalytic cracking diesel, catalytic cracking technology, applied in the field of diesel processing, can solve the problems of high hydrogen consumption, high cost, low yield of olefins and aromatics, etc., to improve the hydrogenation activity of aromatics, reduce hydrogen consumption, and extend the operation cycle Effect

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a method and system for jointly treating catalytic cracking diesel oil and catalytic cracking diesel oil in order to overcome the defects of low yield of olefins and aromatics, high hydrogen consumption and high cost in the diesel processing process existing in the prior art, Thus effectively increasing the yield of olefins and aromatics, reducing hydrogen consumption and cost

Method used

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  • Method for combined treatment of catalytically cracked diesel and catalytically cracked diesel and system
  • Method for combined treatment of catalytically cracked diesel and catalytically cracked diesel and system
  • Method for combined treatment of catalytically cracked diesel and catalytically cracked diesel and system

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Embodiment approach

[0074] The inventors of the present invention found in research that introducing a carboxylic acid compound into the second hydrogenation catalyst can protect the active components of the second hydrogenation catalyst and improve the activity of the catalyst. Therefore, as long as the carboxylic acid is introduced into the second hydrogenation catalyst, the effect of protecting the active components of the second hydrogenation catalyst and improving the activity of the second hydrogenation catalyst can be achieved, and there is no special limitation on the added amount. According to a preferred embodiment of the present invention, the dry basis weight ratio of the carboxylic acid to the inorganic refractory component is 0.1-0.8:1, preferably 0.2-0.6:1.

[0075]Preferably, the carboxylic acid is selected from C1-18 monobasic saturated carboxylic acids (for example, C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15 , C16, C17, C18 monobasic saturated carboxylic ac...

preparation example 1

[0160] This preparation example is used to illustrate the source of the first hydrogenation catalyst

[0161] The first hydrogenation catalyst is the purchased molded RS-2100 catalyst, produced by Sinopec Changling Catalyst Branch. It is a nickel-tungsten catalyst with a bulk density of 1.03g / cm 3 , the average particle diameter is 2-3mm, and the specific surface area is 165m 2 / g.

preparation example 2-1

[0163] This preparation example is used to illustrate the second hydrogenation catalyst and its preparation method.

[0164] (1) commercially available white carbon black (specific surface area is 220m 2 / g, the average pore diameter is 12.7nm), mixed with basic cobalt carbonate powder, and then fired at 400°C for 3h to obtain cobalt-containing inorganic refractory powder.

[0165] Wherein, the amount of basic cobalt carbonate used corresponds to the content of cobalt (calculated as cobalt oxide) in the catalyst being 22.0% by weight.

[0166] (2) A certain amount of MoO 3 Add basic cobalt carbonate and citric acid into the aqueous solution containing phosphoric acid respectively, and dissolve them completely under heating and stirring to obtain an impregnating solution containing active metals.

[0167] Wherein, the mass of citric acid is 20% by weight of the mass of the inorganic refractory component.

[0168] (3) Mix the impregnating solution and the inorganic refractory...

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Abstract

The invention relates to the field of diesel oil processing, in particular to a method for combined treatment of catalytic cracking diesel oil and catalytic cracking diesel oil and a system . The method comprises the following steps: mixing catalytic cracking diesel oil and catalytic cracking diesel oil, and fractionating the obtained mixed diesel oil raw material in a diesel oil fractionation unit to obtain a light diesel oil fraction and a heavy diesel oil fraction; introducing the light diesel oil fraction into a catalytic cracking unit to serve as at least part of cracking raw oil for catalytic cracking; introducing the heavy diesel oil fraction into a hydrogenation unit for hydrotreating, and introducing a heavy diesel oil fraction hydrogenation product into a catalytic cracking unit to serve as at least part of cracking raw oil for cracking. The system comprises the catalytic cracking unit (1), the catalytic cracking unit (2), the diesel oil fractionation unit (3) and the hydrogenation unit (4). The method for combined treatment of catalytic cracking diesel oil and catalytic cracking diesel oil and the system provided by the invention can effectively improve the yield of olefin and aromatic hydrocarbon, and reduce hydrogen consumption and cost.

Description

technical field [0001] The invention relates to the field of diesel processing, in particular to a method and system for combined treatment of catalytic cracking diesel oil and catalytic cracking diesel oil. Background technique [0002] Catalytic cracking diesel has a relatively high proportion in my country's diesel products, accounting for about 1 / 3 of the diesel pool. Its properties are mainly characterized by high content of sulfur, nitrogen and aromatics, low cetane number and poor stability. 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 catalytic diesel has further increased, and the cetane number has further decreased . With the increasing awareness of environmental protection, the state has continuously upgraded the clean quality requirements for ordinary diesel oil, and at the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00B01J27/19
CPCC10G67/00B01J27/19
Inventor 鞠雪艳习远兵孟勇新王哲丁石陈文斌张锐葛泮珠
Owner CHINA PETROLEUM & CHEM CORP
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