Conversion method for petroleum hydrocarbons

A technology for petroleum hydrocarbons and gasoline, applied in the field of catalytic cracking, which can solve problems such as improving product distribution

Active Publication Date: 2008-04-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In the above-mentioned prior art, it has not been possible to improve the product distribution and reduce the content of olefins in the gasoline composition at the same time.

Method used

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  • Conversion method for petroleum hydrocarbons
  • Conversion method for petroleum hydrocarbons

Examples

Experimental program
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Effect test

Embodiment 1

[0043] This example illustrates the distribution of products obtained by adopting the method provided by the present invention and using different operating conditions for straight-run wax oil on a medium-sized catalytic cracking unit.

[0044] The flow chart of the medium-sized catalytic cracking unit is as follows: figure 1 As shown, the feed oil M listed in Table 2 is used as the raw material, and the preheated feed oil M is injected into the riser reactor through the pipeline 2, and is in contact with the mixed catalyst of catalyst A listed in Table 1. The raw catalyst and the 700°C regenerated catalyst are mixed at a ratio of 0.1:1. The reaction temperature in the first reaction zone of the riser reactor is 515°C, the pressure at the top of the reactor is 0.2 MPa, and the reaction time is 1.2 seconds; The reaction temperature in the second reaction zone is 500° C., and the reaction time is 4 seconds. The agent-to-oil ratio of the device is 9.6:1. The reaction product, s...

Embodiment 2

[0050] This example illustrates the reaction of atmospheric residual oil in a medium-sized catalytic cracking unit by adopting the method provided by the present invention.

[0051] The flow chart of the medium-sized catalytic cracking unit is as follows: figure 2 As shown, the feed oil N listed in Table 2 is used as the raw material, and the preheated feed oil N is injected into the riser reactor through the pipeline 2, and is in contact with the catalyst B listed in Table 1. The regenerated catalyst B is cooled at 650°C Regenerated catalyst, the reaction temperature in the first reaction zone of the riser reactor is 515 ° C, the pressure at the top of the reactor is 0.2 MPa, the reaction time is 1.2 seconds, the reaction temperature in the second reaction zone is 500 ° C, and the reaction time is 4 seconds. Under the catalytic conversion reaction. The reaction product, steam and raw catalyst are separated in the settler, and the reaction product is separated to obtain gas ...

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Abstract

A transformation method for petroleum hydrocarbons includes the following steps: hot regenerated catalyst is returned to the bottom of a reactor after cooling down and is conveyed to the bottom of the first reaction zone of the reactor by pre-lifting gas so as to contact preheated base oil for cracking reaction; the mixture of reaction products, water vapor and catalyst enters into a diameter-expanded second reaction zone for further hydrocarbon transformation reaction with the reaction products, water vapor and spent catalyst undergoing gal-solid separation; gas phase products are separated to obtain various products; in addition, the spent catalyst is conveyed to a regenerator after steam stripping for recycling use after singeing regeneration or part of the spent catalyst directly enters into the mixer arranged at the bottom of the reactor. The method which adopts a reactor riser with two reaction zones improves the contact state of base oil and catalyst through lowering oil contact temperature so as to increase the yield and the selectivity of object reactant and to improve the properties of object product.

Description

technical field [0001] The present invention belongs to the catalytic cracking method of hydrocarbon oil in the absence of hydrogen, more specifically, it belongs to the method of contacting and converting petroleum hydrocarbons and catalysts. Background technique [0002] Fluid catalytic cracking is achieved by contacting petroleum hydrocarbons and catalysts in a fluidized bed or riser reactor. With the progress of the cracking reaction, a large amount of coke is generated and deposited on the catalyst to form a raw catalyst, which is circulated to the regenerator, burns in contact with air at high temperature, and forms a regenerated catalyst after being burnt, and the regenerated catalyst is returned to the reactor. Continue to react with fresh raw oil again. The fluidized circulation of the catalyst can be realized through various gaseous media. [0003] Although the fluid catalytic cracking process is relatively mature, people are still trying to find new technologies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05
Inventor 许友好龚剑洪魏晓丽马建国龙军张久顺
Owner CHINA PETROLEUM & CHEM CORP
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