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Hydrocracking method of high-yield high-quality chemical raw material

A technology of hydrocracking and chemical raw materials, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment. It can solve problems such as complex process flow, improve economic efficiency, reduce dry gas production rate, and reduce quenching hydrogen consumption. Effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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AI Technical Summary

Problems solved by technology

This method can produce high-aromatic latent heavy naphtha and high-quality tail oil at the same time, but the process is more complicated than the conventional hydrocracking process, and has limitations. More than 60wt%, cetane number <30

Method used

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  • Hydrocracking method of high-yield high-quality chemical raw material

Examples

Experimental program
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Effect test

Embodiment 1～5

[0039] Embodiment 1~5 adopts figure 1 In the schematic process shown, the properties of the raw oil used are shown in Table 1, and FF-46 hydropretreatment catalyst, hydrocracking catalyst I / hydrocracking catalyst II catalyst system with different volume ratios are selected, and the composition and properties of the catalyst are shown in Table 1. 2. The processing condition and product property of embodiment 1~5 are listed in table 3. The distillation ranges of the fractions in the examples are: light naphtha350°C.

[0040] The results of Examples 1 to 5 show that by using the hydrocracking method of the present invention, the heavy raw oil can be converted into high-quality high-value-added chemical raw materials such as light naphtha, heavy naphtha and hydrogenated tail oil.

[0041] Table 1 Main properties of raw oil.

[0042] Raw oil Iran VGO Victory VGO Density(20℃) / g·cm -3 0.9072 0.9241 Distillation range / ℃ 285～537 350～550 Sulfur, wt% ...

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Abstract

The invention discloses a hydrocracking method of a high-yield high-quality chemical raw material. According to the hydrocracking method comprises following steps: raw oil and hydrogen are subjected to hydrofinishing and are delivered through a first cracking reaction zone successively, and middle fraction oil is obtained via separation, and is delivered to a second cracking reaction zone for cracking; the first cracking reaction zone comprises two cracking catalysts, an upper zone is filled with a catalyst I, and a lower zone is filled with a catalyst II; the catalyst I comprises 30 to 70% of modified Y molecular sieve; the catalyst II comprises 15 to 50% of modified Y molecular sieve; and the content of the modified Y molecular sieve in the catalyst I is 10 to 30% higher than that in the catalyst II. Acid center of the catalyst I matches hydrogenation center, and the catalyst I possesses excellent heavy naphtha selectivity; and the catalyst II possesses excellent aromatic hydrocarbon transformative capacity, and is capable of transforming aromatic hydrocarbons in heavier components into smaller molecules so as to distribute in heavy petroleum fractions. The two catalysts are combined, so that demands of the high-yield high-quality chemical raw material are satisfied.

Description

technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method which simultaneously uses different types of hydrocracking catalysts to produce high-quality chemical raw materials in a maximum amount. Background technique [0002] With the rapid development of the world economy, the demand for chemical products has increased dramatically, and correspondingly, the demand for chemical raw materials for the production of these chemical products has also increased significantly. The production of chemical raw materials from petroleum fractions is one of the very important means. The most important chemical raw materials are benzene, toluene, xylene, ethylene, propylene, etc., and heavy naphtha obtained by hydrocracking of petroleum fractions is benzene, toluene, xylene It is an important source of light aromatics, and the obtained light naphtha and hydrocracking tail oil are high-quality raw materials for steam cracking to produce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/02
Inventor 彭冲于淼王仲义黄新露石友良曾榕辉王晶晶
Owner CHINA PETROLEUM & CHEM CORP
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