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Method for producing light aromatic hydrocarbons and high-quality oil products from catalytically cracked diesel

A technology for catalytic cracking of diesel oil and light aromatics, which is applied in the fields of chemical instruments and methods, hydrocarbon cracking to produce hydrocarbons, and treatment of hydrocarbon oils. , improve the effect of pertinence and selectivity

Active Publication Date: 2013-07-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the liquid-liquid extraction and extractive distillation processes in the aromatics extraction process are very mature, but they mainly focus on the separation and treatment of C6-C8 aromatics. For the separation and application of heavy aromatics in the diesel fraction less

Method used

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  • Method for producing light aromatic hydrocarbons and high-quality oil products from catalytically cracked diesel
  • Method for producing light aromatic hydrocarbons and high-quality oil products from catalytically cracked diesel

Examples

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Effect test

example 1

[0031] According to the method of the invention, FCC diesel is processed to produce BTX and high-quality oil products.

[0032] FCC diesel oil A is used as the extraction material, and its composition is shown in Table 1. Take 100g of FCC diesel oil A and 100g of N,N-dimethylformamide (DMF) into the separatory funnel, oscillate fully to make it evenly mixed, and let stand to separate layers. Take the raffinate of the upper layer, its quality is 55g, add 30g of water therein, fully oscillate and mix evenly, after standing for stratification, separate the oil-water phase to obtain 51g of raffinate, its composition is shown in Table 2.

[0033] The quality of the extracted phase obtained after separating the raffinate phase was 145g, which was subjected to vacuum distillation, and a total of 108g of the extraction solvent and some light components were distilled off to obtain 37g of extracted oil, the composition of which is shown in Table 3.

[0034]Pass the extracted oil into ...

example 2

[0036] According to the method of example 1, FCC diesel oil B is extracted and separated, and the composition of FCC diesel oil B is shown in Table 1. Finally, 47g of raffinate oil was obtained, and its composition was shown in Table 2; 43g of extracted oil was obtained, and its composition was shown in Table 3. The extracted oil is subjected to hydrofining and hydrocracking reactions. The hydrofining catalyst is the catalyst with the brand name RS-1000 produced by Changling Catalyst Factory, and the hydrocracking catalyst is the catalyst with the brand name RHC-2 produced by Changling Catalyst Factory. . The hydrogenation reaction temperature is 380°C, the hydrogen partial pressure is 5.5MPa, and the raw material volume space velocity is 0.8h -1 , The hydrogen / oil volume ratio is 800, and the composition of the extracted oil after hydrogenation reaction is shown in Table 4.

example 3

[0038] FCC diesel oil A is extracted and separated by the method of example 1 and the extracted oil is carried out to hydrotreating. The difference is that the extraction solvent is dimethyl sulfoxide, and 49g of raffinate is obtained, and its composition is shown in Table 2; 39g of extracted oil , its composition is shown in Table 3; the composition of the extracted oil after hydrofining and hydrocracking reactions is shown in Table 4.

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Abstract

The invention discloses a method for producing light aromatic hydrocarbons and high-quality oil products from catalytically cracked diesel. The method comprises the following steps of 1, carrying out extraction of catalytically cracked diesel by an extraction solvent to obtain polycyclic aromatic hydrocarbon-rich extract oil and alkane-rich raffinate oil, 2, carrying out hydrofining and hydrocracking of the polycyclic aromatic hydrocarbon-rich extract oil under the hydrogenation reaction conditions to obtain light aromatic hydrocarbons and a high-octane number gasoline fraction. The method can realize production of light aromatic hydrocarbons, high-cetane number diesel and high-octane number gasoline.

Description

technical field [0001] The invention relates to a production method of light aromatic hydrocarbons, in particular, a method for producing light aromatic hydrocarbons by utilizing catalytic cracking (FCC) diesel oil. 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%). It must be upgraded before it can be used as a blending component of fuel oil. However, the high operating cost and harsh conditions of hydro-upgrading lead ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C7/163C07C15/02C10G67/04
Inventor 史军军朱宁葸雷果卉马秀艳
Owner CHINA PETROLEUM & CHEM CORP
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