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Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, used in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low micropore volume and achieve low coke yield, excellent heavy oil conversion capacity, and high gasoline yield. Effect

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Y-type molecular sieve prepared by this method has ultra-high mesoporous content, but the micropore volume is low

Method used

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  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof

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preparation example Construction

[0037] The present invention also provides a method for preparing a catalytic cracking catalyst, the preparation method comprising: mixing the raw materials used to prepare the catalytic cracking catalyst with water, and then performing beating and spray drying; wherein, in terms of dry weight, the raw materials include 25 - 75% by weight of phosphorus and rare earth-containing Y molecular sieve, 10-30% by weight of precursors of inorganic oxide binders and 15-65% by weight of natural minerals; crystals of said phosphorus and rare earth-containing Y molecular sieve The cell parameter is 24.35-24.55 Angstroms, with P 2 o 5 Calculated and based on the dry weight of the molecular sieve, the phosphorus content of the molecular sieve is 0.3-10.0% by weight; 2 o 3 Calculated and based on the dry basis weight of the molecular sieve, the rare earth content of the molecular sieve is 0.5-19% by weight; the Al distribution parameter D of the molecular sieve satisfies: 0.4≤D≤0.9, wherei...

preparation Embodiment 1

[0064] Y molecular sieve (produced by Catalyst Qilu Branch, unit cell parameter 24.63 angstroms) and NH 4 Cl and distilled water were mixed and beaten evenly at a ratio of 1:1:10, ammonium was exchanged at 70°C for 1 hour, the sample was filtered, washed, and dried, and the sodium content of the molecular sieve was determined to be less than 5% by weight. The above-mentioned molecular sieves were calcined at 600° C. and 100% steam for 2 hours. Take 100 g (dry basis mass) of the roasted molecular sieve and add water to prepare a molecular sieve slurry with a solid content of 10% by weight, add 3 g of citric acid during stirring, and then add 400 g of hydrochloric acid (mass fraction 10%) for 30 minutes; heat up to a constant temperature of 75 ° C Stir for 1 h, filter and wash until the filtrate is neutral; add water to the filter cake and beat to obtain a molecular sieve slurry with a solid content of 10% by weight, add 10.42 g of NaOH (purity 96%), heat up to 50 ° C and stir a...

preparation Embodiment 2

[0072] Y molecular sieve (produced by Catalyst Qilu Branch, unit cell parameter 24.63 angstroms) and NH 4 Cl and distilled water were mixed and beaten evenly at a ratio of 1:1:10, ammonium was exchanged at 70°C for 1 hour, the sample was filtered, washed, and dried, and the sodium content of the molecular sieve was determined to be less than 5% by weight. The above-mentioned molecular sieves were calcined at 600° C. and 100% steam for 2 hours. Take 100g of roasted molecular sieve (mass on a dry basis) and add water to prepare a molecular sieve slurry with a solid content of 10% by weight, add 5g of oxalic acid during stirring, and then add 200g of sulfuric acid (mass fraction 10%) for 30 minutes; heat up to 30°C and stir at a constant temperature 2h, filter and wash until the filtrate is neutral; add water and beat the filter cake to obtain a molecular sieve slurry with a solid content of 10% by weight, add 31.25g KOH (purity 96%), heat up to 70°C and stir at a constant temper...

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Abstract

The invention relates to a catalytic cracking catalyst and a preparation method thereof. The catalytic cracking catalyst comprises, 25 to 75 wt% of a Y molecular sieve containing phosphorus and rare earth, 10 to 30 wt% of an inorganic oxide binder and 15 to 65 wt% of natural mineral matters, wherein the Y molecular sieve containing phosphorus and rare earth has a cell parameter of 24.35 to 24.55 angstroms; the phosphorus content of the molecular sieve is 0.3 to 10.0 wt% in terms of P<2>O<5> and on the basis of the dry base weight of the molecular sieve; the rare earth content of the molecularsieve is 0.5 to 19 wt% in terms of RE<2>O<3> and on the basis of the dry base weight of the molecular sieve; the distribution parameter D of Al in the molecular sieve is no less than 0.4 and no more than 0.9; the mesopore volume of the molecular sieve accounts for 25 to 65% of total pore volume; the amount of strong acids in the molecular sieve accounts for 65 to 78% of total acid amount; and a ratio of the amount of the acid B to the amount of the acid L is 21 to 98. The catalytic cracking catalyst provided by the invention has the advantages of excellent heavy oil conversion capability, higher gasoline yield and lower coke yield when applied to catalytic cracking of heavy oil.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst and a preparation method thereof. Background technique [0002] Catalytic cracking (FCC) is an important secondary processing process of crude oil and occupies a pivotal position in the oil refining industry. In the catalytic cracking process, heavy fractions such as vacuum distillate oil or residues of heavier components react in the presence of catalysts and are converted into high value-added products such as liquefied gas, gasoline, and diesel oil. In this process, it is usually necessary to use Catalytic material with high cracking activity. Molecular sieves are widely used in petroleum refining and processing industries due to their shape-selective properties, high specific surface area, and strong acidity. Y-type molecular sieves (HY, REY, USY) have been the main active components of catalytic cracking and hydrocracking catalysts since they were first used in the 1960s. However, with the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05
CPCB01J29/088C10G11/05C10G2300/1037C10G2300/70C10G2400/02
Inventor 庄立罗一斌朱玉霞欧阳颖任飞刘建强陈振宇舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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