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Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of low micropore volume and achieve high gasoline yield and excellent heavy oil conversion ability

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

[0032] 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 mesoporous-rich Y molecular sieve, 10-30% by weight of precursors of inorganic oxide binders and 15-65% by weight of natural minerals; crystals of said mesoporous-rich Y molecular sieve The cell parameter is 24.35-24.55 angstroms, the relative crystallinity is ≥92%, and the Al distribution parameter D of the molecular sieve satisfies: 0.3≤D≤0.8, wherein, D=Al(S) / Al(C), Al(S) represents The aluminum content of any region larger than 100 square nanometers within the distance H from the edge of the molecular sieve crystal grain measured by the TEM-EDS method, Al(C) represents the geometry of the crystal plane of the molecular sieve crystal gra...

preparation Embodiment 1

[0052] With Y molecular sieve (catalyst Qilu branch production, unit cell parameter ) 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 below 5% by weight. The above-mentioned molecular sieves were calcined at 600° C. and 100% steam for 2 hours. Get roasted molecular sieve 100g (dry basis mass) 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 below 3% by weight. The above-mentioned molecular sieves were calcined at 620° C. and 100% steam for 2.5 hours. After roasting, add water and beat the sample to obtain a molecular sieve slurry with a solid content of 10% by weight, add 11.23g NaOH (purity 96%), heat up to 50°C and stir at a constant ...

preparation Embodiment 2

[0070] With Y molecular sieve (catalyst Qilu branch production, unit cell parameter ) 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 below 5% by weight. The above-mentioned molecular sieves were calcined at 600° C. and 100% steam for 2 hours. Get roasted molecular sieve 100g (dry basis mass) 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 below 3% by weight. The above-mentioned molecular sieves were calcined at 650° C. and 100% steam for 1 hour. Add water and beat the roasted sample to obtain a molecular sieve slurry with a solid content of 10% by weight, add 35g NaOH (purity 96%), heat up to 50°C and stir at a constant temperature fo...

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Abstract

The invention relates to a catalytic cracking catalyst and a preparation method thereof. The catalytic cracking catalyst comprises, on the basis of dry base weight, 25 to 75 wt% of a Y molecular sieverich in mesopores, 10 to 30 wt% of an inorganic oxide binder and 15 to 65 wt% of natural mineral matters, wherein the Y molecular sieve rich in mesopores has a cell parameter of 24.35 to 24.55 angstroms and relative crystallinity of no less than 92%; the distribution parameter D of Al in the molecular sieve is no less than 0.3 and no more than 0.8; the micropore specific area of the molecular sieve is 650 to 800 m<2> / g; and the mesopore volume of the molecular sieve accounts for 25 to 65% of total pore volume. The catalytic cracking catalyst provided by the invention has the advantages of excellent heavy oil conversion capability and higher gasoline 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): B01J29/08
CPCB01J29/084B01J2229/16B01J2229/38
Inventor 欧阳颖罗一斌朱玉霞刘建强陈振宇庄立任飞舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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