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Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as secondary pollution, poor stability, and poor use effects

Active Publication Date: 2021-03-30
湖南长科诚享石化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the low catalyst activity, poor stability, low wear index and low utilization rate of spent catalyst in the prior art, and the regenerated catalyst has low activity, poor stability, poor use effect and secondary problems caused by recycling. To solve the problem of secondary pollution, a catalytic cracking catalyst and a preparation method thereof are provided

Method used

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  • Catalytic cracking catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] L1.1 At 20°C and a pressure of 10 mm water column, add 105 kg of deionized water and 3 kg of liquid water glass (130g / L) into the beating tank with stirring, start the mixer, add 33 kg of kaolin, and stir for 60 Minutes, add 2 kilograms of NaY fine powder, stir for 30 minutes, add 4 kilograms of liquid sodium hydroxide (20% by weight), stir for 30 minutes, add 18 kilograms of catalytic cracking spent catalyst, stir for 30 minutes, make mixed slurry L1-1 ;

[0078] L1.2 Add the mixed slurry L1-1 into the stirring grinder and grind for 30 minutes to make the spray slurry L1-2. The average particle size of the solid particles in the spray slurry is 5 microns;

[0079] L1.3 Add the spray slurry L1-2 evenly into the spray dryer, control the tail gas temperature of the spray dryer to 300°C, and the pressure to -500mm water column, and spray to form 52 kg of spray microspheres to make spray microspheres L1 -3, the average particle diameter of the sprayed microspheres is 71 mi...

Embodiment 2

[0090] L2.1 Under the conditions of 40°C and pressure of 0mm water column, add 70kg of deionized water and 4kg of liquid water glass (130g / L) into the beating tank with stirring, start the mixer, add 25kg of kaolin, and stir for 30 minutes , add 1.5 kg of NaY fine powder, stir for 30 minutes, add 3.5 kg of liquid sodium hydroxide (20% by weight), stir for 30 minutes, add 35 kg of catalytic cracking waste catalyst, stir for 30 minutes, and make a mixed slurry L2-1;

[0091] L2.2 Add the mixed slurry L2-1 into the stirring grinder, and grind for 30 minutes to make the spray slurry L2-2, the average particle size of the solid particles in the spray slurry is 5 microns;

[0092] L2.3 Add the spray slurry L2-2 evenly into the spray dryer, control the tail gas temperature of the spray dryer to 900°C, and the pressure to 0mm water column, and spray to form 61 kg of spray microspheres, which are made into spray microspheres L2- 3. The average particle size of the spray microspheres is...

Embodiment 3

[0103] L3.1 Under the conditions of 30°C and pressure of -10mm water column, add 84 kg of deionized water and 6 kg of liquid water glass (130g / L) into the beating tank with stirring, start the mixer, add 57 kg of kaolin, and stir for 30 Minutes, add 3 kilograms of NaY fine powder, stir for 30 minutes, add 7 kilograms of liquid sodium hydroxide (20% by weight), stir for 30 minutes, do not add spent catalytic cracking catalyst, make mixed slurry L3-1;

[0104] L3.2 Add the mixed slurry L3-1 into the stirring grinder, and grind for 30 minutes to make the spray slurry L3-2, the average particle diameter of the solid particles in the spray slurry is 5 microns;

[0105] L3.3 Add the spray slurry L3-2 evenly into the spray dryer, control the tail gas temperature of the spray dryer to 600°C, and the pressure to -250mm water column, and spray to form 56 kg of spray microspheres, which are made into spray microspheres L3. -3, the average particle diameter of the spray microspheres is 69...

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Abstract

The invention relates to the field of catalytic cracking, and discloses a catalytic cracking catalyst and a preparation method thereof. The method comprises the following steps: (1) mixing a fresh catalyst raw material with an optional waste catalyst, and molding the raw material to obtain a molded material, the fresh catalyst raw material containing a first binder, a silicon-aluminum material, afirst guiding agent and a first sodium supplement; (2) roasting the formed material to obtain a roasted product; and (3) mixing the roasted product, a first silicon supplement, a second guiding agentand a second sodium supplement, carrying out a crystallization reaction to obtain an intermediate catalyst, and carrying out ion exchange on the intermediate catalyst to replace the sodium element inthe intermediate catalyst with the rare earth element. According to the method, heavy metals in the waste catalyst can be masked by reactants, so that the heavy metals lose the original reaction effect, the obtained catalyst is high in activity and good in stability, and secondary pollution cannot be generated in the recycling process.

Description

technical field [0001] The invention relates to the field of catalytic cracking, in particular to a catalytic cracking catalyst and a preparation method thereof. Background technique [0002] The catalyst prepared by the existing catalytic cracking catalyst preparation method has low activity, poor stability and low wear index. In addition, the catalytic cracking unit is one of the main devices in petroleum processing, and it is an important device for converting heavy oil into gasoline, diesel oil and liquefied petroleum gas. Catalytic cracking units need to use a large amount of catalytic cracking catalysts. After a period of use, the heavy metals in the raw oil will be enriched on the catalyst microspheres, which will increase the heavy metal content of the catalyst and reduce the cracking activity. In order to ensure the balance of the catalyst in the unit If the activity is within a certain range, part of the balanced catalyst must be continuously discharged at a certa...

Claims

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Application Information

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IPC IPC(8): B01J29/08C10G11/05
CPCB01J29/088C10G11/05B01J2229/18
Inventor 阳光军高伟军周林辉李友廷
Owner 湖南长科诚享石化科技有限公司