Cracking method for hydrocarbon oil

A hydrocarbon oil and cracking reaction technology, applied in the field of hydrocarbon oil cracking, can solve the problems of low yield of liquid, low yield of dry gas and coke, and high yield of dry gas and coke, so as to reduce the yield of coke and reduce the yield of dry gas. Gas and coke yield, the effect of improving yield

Active Publication Date: 2008-06-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0007] The purpose of the present invention is to provide a hydrocarbon oil cracking method with higher liquid yield and lower yield of dry gas an

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  • Cracking method for hydrocarbon oil
  • Cracking method for hydrocarbon oil

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Embodiment 1

[0046] This embodiment adopts a medium-sized riser reactor, which is a cylindrical structure with a total height of 10 meters and a diameter of 25 centimeters, wherein the height ratio of the lower, middle and upper reaction zones is 0.67:1:7.5. The lowermost part of the riser is the pre-lift section.

[0047] The raw material oil processed by the device is that the light raw material introduced from the lower reaction zone is catalytic cracking gasoline; the inferior heavy raw material introduced from the middle reaction zone is vacuum residue; the heavy raw material introduced from the upper reaction zone is wax oil ( vacuum gas oil). The feed amount of the catalytic cracking gasoline is 15% by weight of the gas oil, and the feed amount of the vacuum residue is 20% by weight of the gas oil. The properties of various feedstock oils are listed in Table 1. The brand name of the catalyst is LV-23, which is produced by Qilu Catalyst Factory of China Petrochemical Corporation. Th...

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Abstract

The invention discloses a hydrocarbon oil cracking method which comprises that: in a riser reactor comprising a plurality of reaction areas, the hydrocarbon oil raw material and the cracking catalyst are made a contact reaction in each reaction area under the condition of cracking reaction, the catalyst is separated from the reaction product to obtain the cracking product and spent catalyst, at least partial spent catalyst is regenerated to obtain the semi-regenerated catalyst and the regenerated catalyst, wherein, the reaction areas comprise at least one middle reaction area and at least one upper reaction area, the upper reaction area is positioned above the middle reaction area; the inferior heavy raw material and the semi-regenerated catalyst are imported in the middle reaction area to allow the heavy raw material to contact the semi-regenerated catalyst; the heavy raw material and the regenerated catalyst are imported in the upper reaction area to allow the heavy raw material to contact the regenerated catalyst. At least one item of the carbon residue content, the content of metal nickel and vanadium, the bitumencarb content and the basic nitrogen content of the inferior heavy raw material is higher than that of the heavy raw material. The method can optimize the cracking conditions of the hydrocarbon oil and improve the distribution of products.

Description

technical field [0001] The invention relates to a method for cracking hydrocarbon oil. Background technique [0002] Catalytic cracking is one of the important means of petroleum secondary processing, which is used to produce gasoline, diesel, liquefied petroleum gas, etc. from heavy crude oil. Modern catalytic cracking processes use molecular sieve catalysts and the reaction / regeneration process is continuous. The raw oil is atomized with water vapor and sprayed into the riser reactor, where it contacts with the high-temperature catalyst (550-700°C) from the regenerator, and then undergoes cracking reaction. The residence time of the oil and gas generated by the cracking reaction in the riser reactor is very short, generally only a few seconds. The reaction product leaving the riser reactor is separated from entrained catalyst in a settler, and then goes to a fractionation column for product separation. The catalyst with coke (called spent catalyst) falls from the settle...

Claims

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Application Information

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IPC IPC(8): C10G11/02
Inventor 侯典国毛安国许友好张久顺谢朝钢
Owner CHINA PETROLEUM & CHEM CORP
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