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Method for quick in situ synthesis of catalytic cracking catalyst

An in-situ synthesis and catalytic cracking technology, applied in the field of catalysis, can solve the problems of long in-situ crystallization time and complicated preparation

Active Publication Date: 2010-01-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although CN1549746A, CN1232862A, and CN1334318A all involve the use of calcined kaolin as the substrate for in-situ synthesis to prepare Y molecular sieves, they all show that the preparation is cumbersome if a large number of Y crystal seeds need to be added, and the in-situ crystallization times disclosed in these patents are relatively Long, usually more than 20h or even 30h

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017]It is the rapid in-situ crystallization catalytic cracking catalyst of the present invention. First, 200g of raw kaolin powder with a particle size of 200 mesh, 150g of spinel, 50g of mullite, and 97g of pseudoboehmite produced in Anhui Province were added to 380g of water for beating, and then 15g of hydrochloric acid and 391g of 5% aluminum sol were added. After stirring evenly, The slurry was spray-dried to make microspheres, and after spray-drying, it was calcined at 600° C. for 2 hours to obtain calcined microspheres. Get 5 liters of beakers again, after taking above-mentioned roasting microsphere 445g and adding 745g water to make a slurry, then get another 488g tap water to dissolve 132NaOH and pour the microsphere slurry into, then add 832g water glass and stir evenly, add 23g Y crystal seeds, After continuing to stir for 2 hours, crystallize in an autoclave, heat up to 115° C. for 2 hours and discharge at a constant temperature for 18 hours, filter, wash with wa...

Embodiment 2

[0019] It is the rapid in-situ crystallization catalytic cracking catalyst of the present invention. First, 250g of raw kaolin powder with a particle size of 400 mesh produced in Shanxi, 200g of spinel and 440g of water are added for beating, then 22g of hydrochloric acid and 178g of 5% aluminum chloride are added, and 98g of silica sol is added after stirring, and the slurry after mixing evenly is spray-dried to produce Microspheres were calcined at 800° C. for 2 h to obtain calcined microspheres. Take a 5-liter beaker again, take 396g of the above-mentioned roasted microspheres and add 250g of water for beating, then take another 467g of 45% sodium hydroxide solution and pour the microsphere slurry into it, add 1532g of water glass and stir evenly, then slowly add 8% aluminum sulfate solution 1300g, then add 33g Y seed crystals, continue to stir for 2 hours, then crystallize in an autoclave, heat up to 100°C in 2 hours and discharge at a constant temperature for 15 hours, fi...

Embodiment 3

[0021] It is the rapid in-situ crystallization catalytic cracking catalyst of the present invention. Firstly, 500g of raw kaolin flour with a particle size of 600 mesh produced in Hebei Province was added to 280g of water for beating, then 156g of sodium silicate was added, after stirring evenly, the slurry was spray-dried to make microspheres, and after flash drying, roasted at 960°C for 2 hours to obtain roasted microspheres . Take another 5-liter beaker, take 355g of the above-mentioned roasted microspheres and add 750g of water to make a slurry, then take another 233g of sodium hydroxide and 227g of sodium aluminate to dissolve, pour the microsphere slurry into it, add 1743g of water glass and stir, and then add 53g of Y crystal After continuing to stir for 2 hours, crystallize in an autoclave, heat up to 197°C in 2 hours and discharge at a constant temperature for 13 hours, filter, wash with water, and dry to obtain the original catalyst powder. The catalyst raw powder o...

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Abstract

The invention relates to a method for quick in situ synthesis of a catalytic cracking catalyst. The method comprises the following steps: (1) mixing kaolin, a binding agent and water into slurry; (2) spraying, drying and shaping the liquid to obtain micro spheres; (3) baking the micro spheres; (4) mixing the baked micro spheres and the alkali crystallization solution, and crystallizing the mixture under a hydrothermal condition; and (5) filtering and water-washing the crystallization product to obtain the in situ crystallization product. In the method, the aluminum source is added in the in situ synthesis process of the catalytic cracking catalyst, so that the crystallizing speed is greatly improved, the crystallizing time is shortened, the synthetic efficiency is improved, and the cost of the catalyst is reduced. Compared with the prior catalyst, the catalytic cracking catalyst prepared by the method has better using performance.

Description

technical field [0001] The invention belongs to the field of catalysis, and relates to a molecular sieve catalyst used in petroleum processing, in particular to a method for preparing a fluidized catalytic cracking catalyst with cracking performance by in-situ crystallization technology. technical background [0002] In the heavy oil deep processing technology in the petroleum refining process, catalytic cracking is the most important secondary processing method in the refinery, which makes more heavy oil lighter. The technical principle of catalytic cracking is a chemical catalytic process in which large molecules are cracked into small molecules, and an acidic catalytic reaction with an acidic center as the active site. The so-called FCC is fluid catalytic cracking using a fluidized bed process. In the development of catalytic cracking technology, the milestone leap is the revolution of heavy oil cracking technology triggered by the replacement of natural clay and amorphou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05B01J29/08
Inventor 陈松方向晨刘立军张晓萍
Owner CHINA PETROLEUM & CHEM CORP
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