Catalytic conversion method for producing high-cetane number light diesel oil

A technology for the production of high hexadecane and a catalytic conversion method, which is used in catalytic cracking, cracking, petroleum industry, etc., can solve the problem of high cost, and achieve the effects of reduced crushing tendency, uniform temperature distribution, and reduced catalyst content

Active Publication Date: 2015-01-14
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0003] In the prior art, methods for upgrading catalytic light diesel mainly include hydrotreating and alkylation, but these methods are costly

Method used

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  • Catalytic conversion method for producing high-cetane number light diesel oil

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Effect test

Embodiment

[0044] This example illustrates the production of high-quality light diesel oil by selective cracking reaction using the method provided by the present invention.

[0045] The flow chart of the medium-sized catalytic cracking unit is shown in the attached figure. The feedstock oil is injected into the reaction zone I of the riser reactor through the pipeline 3, and it contacts and reacts with the catalyst A-1 lifted by water vapor at the lower part of the riser reactor. The weight ratio of the catalyst A-1 to the raw oil in the tube reactor is 2:1, the residence time of the raw oil in the riser reactor is 2.6 seconds, and the reaction temperature is 480°C. The pressure of the gas collection chamber is 0.2 MPa. After the oil and gas come out of the riser, they are separated by the cyclone separator and then enter the rear fractionation system. The spent catalyst with carbon enters the stripping section, and the spent catalyst after stripping goes to the regenerator for regenera...

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Abstract

The invention relates to a catalytic conversion method for producing high-cetane number light diesel oil, which comprises the following steps: contacting raw oil with a coarse-particle-size-distribution catalyst containing macroporous zeolite in a reactor to react, wherein the reaction temperature, the oil gas residence time and the weight ratio of catalyst to raw oil are such that the reaction product in which catalytic wax oil accounts for 12-60 wt% of the raw oil can be obtained; and the oil gas residence time is 0.1-5 seconds, the reaction temperature is 420-550 DEG C, and the weight ratio of catalyst to raw oil is 1-10. The method maximally and selectively cracks alkanes, alkyl aromatic side chains and the like in the raw material to enter the light diesel oil fraction of the product so as to ensure that the main component in the light diesel oil fraction is alkanes, thereby finally realizing the direct production of high-cetane number light diesel oil through catalytic cracking, and reducing the tendency to breaking of the catalyst and the consumption of the catalyst.

Description

technical field [0001] The invention relates to a catalytic conversion method for improving the quality of catalytic cracking light diesel oil. More specifically, it is a method for maximally increasing the cetane number of catalytically cracked light oil by catalytic cracking. Background technique [0002] Worldwide demand for high-quality diesel is increasing, while demand for fuel oil is decreasing. Although the increase in demand for gasoline and diesel varies from region to region, overall, the growth rate of demand for diesel worldwide will exceed the growth rate of demand for gasoline. Therefore, more catalytic light diesel oil with low cetane number is being used as a blending component of diesel oil. In order to meet the demand for high-quality diesel oil, it is necessary to upgrade the catalytic light diesel oil, or directly produce a large amount of high-quality catalytic light diesel oil through catalytic cracking (FCC). [0003] In the prior art, methods for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/05
Inventor 龚剑洪许友好胡志海龙军张执刚谢朝钢张久顺崔守业程从礼董建伟
Owner CHINA PETROLEUM & CHEM CORP
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