A kind of Y molecular sieve containing phosphorus and rare earth and preparation method thereof

A technology of molecular sieve and rare earth, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low micropore volume, achieve the effects of reducing olefin content, increasing yield, and reducing coke yield

Active Publication Date: 2019-11-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • A kind of Y molecular sieve containing phosphorus and rare earth and preparation method thereof

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preparation example Construction

[0039] The present disclosure also provides a method for preparing the phosphorus- and rare-earth-containing Y molecular sieve provided in the present disclosure, the preparation method comprising: a. performing ammonium exchange treatment on the NaY molecular sieve, and filtering and washing to obtain the ammonium exchange molecular sieve; Wherein, based on sodium oxide and based on the dry basis weight of the ammonium exchanged molecular sieve, the sodium oxide content of the ammonium exchanged molecular sieve is less than 5% by weight; b, roasting the ammonium exchanged molecular sieve obtained in step a to obtain roasted Molecular sieve; c, the roasted molecular sieve obtained in step b is subjected to dealumination and silicon supplementation treatment under anhydrous conditions using silicon tetrachloride gas to obtain a dealumination silicon supplementation molecular sieve; d, the dealumination silicon supplementation molecular sieve obtained in step c is processed by Ca...

Embodiment 1

[0068] 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 for 2h. Take the calcined molecular sieve in an anhydrous dry environment, pass through SiCl 4 Saturated dry gas, the reaction temperature is 550°C, and the reaction time is 2h; take 100g (dry basis mass) of the above-mentioned molecular sieve and add water to prepare a molecular sieve slurry with a solid content of 10% by weight, add 3g of citric acid during stirring, and then add 400g of hydrochloric acid (mass fraction 10%), the addition time was 30min; the temperature was raised to 75°C and stirred for 1h, filtered and washed until the filtrate was neutral; the ...

Embodiment 2

[0074] 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 550°C for 3h. Take the calcined molecular sieve in an anhydrous dry environment, pass through SiCl 4 Saturated dry gas, the reaction temperature is 550°C, and the reaction time is 2h; take 100g (dry basis mass) of the above-mentioned molecular sieve 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 %), the addition time was 30 minutes; the temperature was raised to 30°C and stirred for 2 hours, filtered and washed until the filtrate was neutra...

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Abstract

The invention discloses a phosphorus-containing and rare earth-containing Y molecular sieve and a preparation method thereof, wherein the unit cell parameter of the molecular sieve is 24.35-24.55 angstrom, the phosphorus content of the molecular sieve is 0.3-10 wt%, the rare earth content of the molecular sieve is 0.5-19 wt%, the Al distribution parameter D of the molecular sieve is more than or equal to 0.4 and is less than or equal to 0.9, the volume of the mesopores of the molecular sieve accounts for 25-65% of the total pore volume, the amount of the strong acid of the molecular sieve accounts for 20-60% of the total acid amount, and a ratio of the acid B to the acid L is 20-100. According to the present invention, the catalyst prepared by using the phosphorus-containing and rare earth-containing Y molecular sieve as the active component can have advantages of excellent heavy oil conversion capacity, high gasoline yield, high liquefied gas yield, low coke yield and low olefin content in gasoline in the heavy oil cracking reaction.

Description

technical field [0001] The present disclosure relates to a phosphorus- and rare earth-containing Y molecular sieve and a preparation method thereof. Background technique [0002] Molecular sieves are widely used in catalysis, adsorption and separation due to their shape-selective properties, high specific surface area and strong acidity. Molecular sieve Y (HY, REY, USY) has been the main active component of catalytic cracking (FCC) catalysts since it was first used in the 1960s. However, with the intensification of heavy crude oil, the content of polycyclic compounds in FCC feedstock increases significantly, while the diffusion capacity of FCC feedstock in the pores of molecular sieves decreases significantly. And the Y molecular sieve pore diameter as main cracking group member only has 0.74nm, is used for processing the heavy distillate such as residual oil, the accessibility of catalyst active center will become wherein contained polycyclic compound (for example polycycl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08C01B39/24C10G11/05
CPCB01J29/088B01J2229/183C01B39/24C01P2002/60C01P2002/85C01P2002/86C10G11/05
Inventor 庄立刘建强欧阳颖罗一斌舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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