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Catalytic conversion method for producing high-cetane number light diesel oil and low-olefin gasoline

A technology for producing high hexadecane and light diesel oil, which is applied 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 uniform particles

Active Publication Date: 2011-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 and low-olefin gasoline
  • Catalytic conversion method for producing high-cetane number light diesel oil and low-olefin gasoline

Examples

Experimental program
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Effect test

preparation example Construction

[0038] The preparation method of catalyst A is briefly described as follows:

[0039] Configuration 2 liters of silica concentration is 155g / L water glass solution and 1 liter of free acid is 148g / L, Al 2 o 3 Acidified aluminum sulfate solution with a content of 20g / L, the above two solutions enter the rapid mixer for reaction at the same time to obtain silica sol.

[0040] Add 465g of kaolin (Suzhou Kaolin Company, solid content 80% by weight) to the silica sol prepared above, and beat for 1 hour to obtain kaolin-silica sol.

[0041] Contains Al 2 o 3 The pseudo-boehmite of 124g (Shandong Aluminum Factory, Al 2 o 3 content is 33% by weight) and 450g deionized water mixed beating for 30 minutes, then adding 25 milliliters of concentration is 31% by weight of hydrochloric acid (acid / Al 2 o 3 Molar ratio is 0.2) peptization, continues beating for 2 hours, then adding 656g molecular sieve content is 32% by weight of ground DASY0.0 molecular sieve (being a kind of super st...

Embodiment

[0045] This example illustrates the production of high cetane number light diesel oil and low olefin catalytic gasoline by selective cracking reaction using the method provided by the present invention.

[0046] The flow chart of the medium-sized catalytic cracking unit is shown in Figure 1. The raw oil is injected into the riser reactor 2 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, and reacts in the riser reactor. The weight ratio of the catalyst A-1 and the raw oil in the reactor is 3:1, the residence time of the raw oil in the riser reactor is 1.6 seconds, and the reaction temperature is 450°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 separation system 14 at the rear. The spent catalyst with carbon enters the stripping section, and the spent catalyst after strippin...

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Abstract

The invention relates to a catalytic conversion method for producing high-cetane number light diesel oil and low-olefin gasoline, which comprises the following steps of: making raw oil contact mitigated converting catalyst with rough grain diameter distribution in a mitigated converting reactor for reacting, wherein the reaction temperature, oil and gas retaining time and the weight ratio of the mitigated converting catalyst to the raw oil are enough to obtain a reaction product containing catalytic wax oil which accounts for 12-60 percent by weight of raw oil, and the reaction product also comprises high-cetane number diesel oil and gasoline; carrying out cracking reaction on the catalytic wax oil in a harsh converting reactor; carrying out hydrogen transfer reaction and isomerization reaction on the generated oil and gas in a certain reaction environment; and separating to obtain a reaction product containing low-olefin gasoline. The method can directly produce high-cetane number light diesel oil and low-olefin gasoline simultaneously by catalytic cracking and reduce the catalyst breakage tendency and catalyst consumption.

Description

technical field [0001] The invention relates to a catalytic conversion method for improving the quality of catalytic cracking light diesel oil and gasoline. More specifically, it is a method of maximally increasing the cetane number of catalytically cracked light oil oil while reducing the olefin content of catalytic gasoline 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C10G11/05
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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