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Treatment method for improving selectivity of catalytic cracking catalyst

A catalytic cracking and treatment method technology, applied in the field of catalytic cracking, can solve the problems such as the inability to improve the industrial equilibrium catalyst activity difference, and achieve the effects of uniform distribution of activity and selectivity, improved selectivity and reduced cost.

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

This method is mainly designed for the difference between the catalysts handled in the laboratory and the industrial equilibrium catalysts, but it cannot improve the activity difference between the industrial equilibrium catalysts

Method used

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  • Treatment method for improving selectivity of catalytic cracking catalyst
  • Treatment method for improving selectivity of catalytic cracking catalyst
  • Treatment method for improving selectivity of catalytic cracking catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0047] This example follows figure 1 with 2 The flow process of fresh catalyst A (this fresh catalyst activity is 81, is 10h self-equilibrium time under the condition of 800 ℃ and 100% water vapor at temperature, and equilibrium activity is 55) through 670 ℃, 20% water vapor, CO / o 2 The initial activity of the obtained catalyst was 1.97, the apparent linear velocity was 0.23m / s, and the aging time was 18h. Replenish the aged catalyst to the regenerator, use the vacuum residue feed oil A as the raw material for catalytic cracking, and conduct a test on the medium-sized device of the riser reactor. The inferior raw material enters the bottom of the riser reactor and contacts with the catalyst A. And catalytic cracking reaction occurs, in the reaction zone I, the reaction temperature is 595°C, and the weight hourly space velocity is 100h -1 , the weight ratio of catalyst to raw material is 6, and the weight ratio of steam to raw material is 0.05; in reaction zone II, the reac...

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Abstract

The invention relates to a treatment method for improving the selectivity of a catalytic cracking catalyst. The method comprises the following steps of: feeding the fresh catalyst in a fluidized bed, preferably a dense-phase fluidized bed; introducing semiregenerated smoke and a gas containing oxygen into the fluidized bed, so that the fuel combusts to release heat; and introducing water vapor to be in contact with the catalyst, and carrying out aging under a certain hydrothermal environment. According to the method disclosed by the invention, the activity and selectivity distribution of the catalyst in a catalytic cracking device is more uniform, and the selectivity of the catalytic cracking catalyst is remarkably improved, therefore the gas yield and the coke yield are remarkably reduced, the water vapor is fully utilized, and the energy consumption of the device is reduced.

Description

technical field [0001] The invention relates to a catalyst treatment method in the field of catalytic cracking, more specifically, a treatment method for improving the selectivity of catalytic cracking catalysts. Background technique [0002] The Y-type zeolite that was first used in the early 1960s was a rare earth exchanged rare earth Y (REY) zeolite. The silicon-aluminum ratio of REY zeolite is less than 5, and the rare earth content is expressed as RE 2 o 3 Not less than 17% by weight (accounting for zeolite), high acid center density, strong hydrogen transfer performance, low content of olefins and naphthenes in gasoline, resulting in a decrease in the octane number of gasoline, and tetraethyl lead has to be used as an octane booster. value additives. Nevertheless, Y-type zeolite has been the main active component of catalysts used in fluid catalytic cracking (FCC) of heavy petroleum hydrocarbons. [0003] In 1975, leaded gasoline was canceled in the United States, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/30B01J38/06B01J29/90
Inventor 崔守业刘新林李强唐津莲程从礼刘守军龚剑洪黄建
Owner CHINA PETROLEUM & CHEM CORP
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