Two-stage hydrocracking method

A hydrocracking and hydrotreating technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of large circulation volume of kerosene distillates, increased equipment investment, complicated operation, etc., and achieves improvement of product quality, Improving the quality and increasing the effect of the smoke point

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, this method needs to increase more equipment, and the circulation of kerosene fraction is relatively large, which increases the investment of the device, and the operation is more complicated

Method used

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  • Two-stage hydrocracking method

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Embodiment 1-3

[0034] use figure 1 The process flow diagram shown. The hydrotreating reactor uses FF-46 hydrocracking pretreatment catalyst, and the hydrocracking reactor adopts a catalyst system of hydrocracking catalyst I / hydrocracking catalyst II graded in different volume ratios. In Examples 1-3, in the hydrocracking reactor, the volume ratios of hydrocracking catalyst I / hydrocracking catalyst II were 2:1, 1:1 and 1:2 respectively, and the properties of the feed oil are shown in Table 1.

[0035] At a reaction pressure of 15.0MPa, the volume ratio of hydrogen to oil in the refining section and the cracking section is 900:1 and 1100:1 respectively, and the volume space velocity of the refining section and the cracking section is 1.0h -1 and 1.2h -1 Under the conditions of > 350 ° C, the process test with a conversion rate of about 80wt% was carried out, and the product quality of each fraction was investigated.

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Abstract

The invention discloses a two-stage hydrocracking method. The two-stage hydrocracking method comprises following steps: (1) inferior raw oil is mixed with hydrogen for hydrofinishing; (2) a hydrofinishing effluent is subjected to gas-liquid separation so as to obtain a gas material and a liquid material; (3) the liquid material is delivered into a hydrocracking reaction zone for hydrocracking, wherein the hydrocracking reaction zone comprises a hydrocracking catalyst I and a hydrocracking catalyst II with different molecular sieve contents; and (4) a hydrocracking effluent is subjected to separation and fractionation so as to obtain needed products. According to the two-stage hydrocracking method, the hydrocracking catalyst I possesses relatively high aromatic hydrocarbon transformation ability, and is capable of transforming aromatic hydrocarbons in raw material heavier components into smaller molecules, and distributing the small molecules into naphtha and jet fuel fractions; the hydrocracking catalyst II possesses relatively high hydrocarbon alkyl cracking ability; synergistic effect of the two catalysts is capable of improving quality of hydrocracking products obviously, and especially increasing smoke point of jet fuel fractions.

Description

Technical field [0001] The present invention involves a method of hydrogenation, especially two sections of hydrogenation method that can produce high -quality jet fuel. Background technique [0002] With the continuous increase of the market's demand for intermediate distillation oil, more intermediate distillation division oil is required to produce refineries, and new fuel standards have put forward stricter requirements for the indicators of vapor and diesel.Obviously, a processing method and FCC process can no longer meet the market's indicators for cleaning fuel.Hydrogenation process is not only a secondary processing method for light quality raw materials, but also an important means to obtain high -quality jet fuel and clean diesel from inferior raw materials. [0003] In recent years, with the shortage of crude oil resources in the world and the increasingly inferiority of crude oil, the nature of the raw materials processed by hydrogenation and cracking device has also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
Inventor 彭冲王仲义曾榕辉石友良黄新露
Owner CHINA PETROLEUM & CHEM CORP
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