Catalytic cracking method

A technology of catalytic cracking and standby catalyst, which is applied in the fields of hydrocarbon cracking, organic chemistry, chemical recovery, etc., and can solve the problems of low market price, low yield of light oil, high yield of liquefied gas, etc.

Inactive Publication Date: 2012-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual industrial implementation of this technology, although the goals of gasoline upgrading, propylene production increase and product distribution have been achieved, the total dry gas yield of the device is still relatively high due to the large amount of dry gas brought about by gasoline upgrading. High, light oil yield is relatively low, and the liquefied gas yield after removing propylene is high, but the market price is low, so technical improvement is still needed to further improve the overall benefit of the device

Method used

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  • Catalytic cracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 (comparative example)

[0025] The test was carried out on the double-riser catalytic cracking test device. The raw material oil riser feed is mixed heavy oil, the main properties are listed in Table 1, and the processing capacity is 30 kg / day; the gasoline riser feed is the self-produced gasoline of the device, and the processing capacity 12 kg / day. The catalyst used in the test is MLC-500 industrial balancer, the balance catalyst has a microreaction activity of 62 and a carbon content of 0.05w%. The main operating conditions and product distribution of the double-riser catalytic cracking test unit are listed in Table 2.

Embodiment 2

[0026] Embodiment 2 (comparative example)

[0027] According to Example 1, the difference is that the reaction temperature of the gasoline riser is 520° C., and the main operating conditions and product distribution are listed in Table 2.

Embodiment 3

[0028] Embodiment 3 (comparative example)

[0029] According to Example 1, the difference is that the reaction temperature of the gasoline riser is 500° C., and the main operating conditions and product distribution are listed in Table 2.

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Abstract

The invention discloses a catalytic cracking method. The method comprises steps of: introducing dry gas and C4 hydrocarbon into a middle and lower part of a stripping section of a sub-precipitator to react with a gasoline coked catalyst; introducing the oil gas after reaction into a sub-fractionating column; introducing part of the coked catalyst treated with steam stripping into a regenerator for regeneration, and introducing the other part of the coked catalyst treated with steam stripping into a pre-lifting mixer and mixing with a regenerative agent from the regenerator; and returning the mixed catalyst to a heavy oil riser reactor. The method can reduce yield of dry gas by 0.3-1.5 percentage, reduce yield of liquefied gas (not including propylene) by 2.0-8.0 percentage, increase yield of gasoline by 1-4 percentage, and increase yield of propylene by 0.5-2.5 percentage.

Description

technical field [0001] The invention belongs to the field of catalytic cracking of hydrocarbon oil in the absence of hydrogen, in particular to a catalytic cracking method for improving light oil yield and propylene. Background technique [0002] While paying attention to environmental protection, maximizing economic benefits is always the goal pursued by enterprises. However, low dry gas yield, high light yield, and high propylene yield have always been important means for catalytic cracking technology to improve economic benefits. In recent years, various domestic research institutions have conducted fruitful research on improving the distribution of catalytic cracking products, and the developed technologies mainly include the following: [0003] UOP company US 5451313 disclosed "X design", UOP company invented this new design in 1995, its purpose is to improve the agent oil ratio, improve product distribution. It is characterized in that a catalyst mixer is set between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/00C07C11/06C07C4/06
CPCY02P20/52Y02P20/584
Inventor 闫鸿飞陈曼桥武立宪孟凡东王龙延李秋芝吴辰捷陈章淼
Owner CHINA PETROLEUM & CHEM CORP
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