A hydrocracking method for processing inferior raw materials

A technology for hydrocracking and inferior feedstock oil, which is applied in hydrotreating process, hydrocarbon oil cracking, petroleum industry and other directions, can solve the problems of large circulating amount of kerosene fractions, increased investment in equipment, complicated operation, etc., so as to improve product quality, The effect of improving quality and increasing yield

Active Publication Date: 2015-08-12
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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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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  • A hydrocracking method for processing inferior raw materials

Examples

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Effect test

Embodiment 1～3

[0034] use figure 1 Process flow chart shown. The hydrotreating reactor uses FF-46 hydrocracking pretreatment catalyst, and the hydrocracking reactor adopts a catalyst system with hydrocracking catalyst I / hydrocracking catalyst II graded in different volume ratios. Catalyst Ⅰ and catalyst Ⅱ are both supported by amorphous silica-alumina and modified Y molecular sieve. In Examples 1-3, the volume ratios of hydrocracking catalyst I / hydrocracking catalyst II were 2:1, 1:1 and 1:2 respectively, and the properties of the raw 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 relates to a hydrocracking method for processing an inferior raw material. The method comprises (1) performing hydrofining reaction of inferior raw oil; (2) performing gas-liquid separation of a hydrofined effluent to obtain a liquid for fractionation; (3) performing hydrocracking reaction on tail oil obtained by the fractionation, two hydrocracking catalyst I and II with different molecular sieve contents existing in a hydrocracking reaction zone; and (4) mixing a hydrocracked effluent and the inferior raw material to get into a hydrotreating reaction zone. According to the method, the upstream catalyst I in the cracking reaction zone has a strong aromatic conversion ability, can convert heavy components in the raw material into smaller molecules to distribute into naphtha and jet fuel fractions, the downstream catalyst II has a strong alkane cracking ability, by synergistic effect of the two catalysts, the quality of hydrocracked products can be significantly improved, and especially, and the smoke point of the jet fuel fractions can be improved.

Description

technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method for processing inferior raw materials to obtain high-quality jet fuel and ultra-low sulfur diesel oil. Background technique [0002] As the market demand for middle distillates continues to increase, refineries are required to produce more middle distillates. The new fuel standard puts forward stricter requirements on the indicators of gasoline and diesel. Obviously, primary processing methods and FCC technology can no longer meet the market's requirements for clean fuels. The hydrocracking process is not only a secondary processing method to lighten heavy 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 worldwide shortage of crude oil resources and the increasingly inferior quality of crude oil, the properties of raw materials processed by hydrocracking unit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/00C10G47/16
Inventor 彭冲王仲义吴子明石友良曾榕辉崔哲
Owner CHINA PETROLEUM & CHEM CORP
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