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Preparation method of mesoporous Y-type molecular sieve

A molecular sieve and mesoporous technology, applied in the direction of octahedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve the problems of long process and limited application range, and achieve reduction in dosage, improvement of environmental protection efficiency, and simple process Effect

Active Publication Date: 2017-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above method has a long process and the scope of application is limited

Method used

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  • Preparation method of mesoporous Y-type molecular sieve
  • Preparation method of mesoporous Y-type molecular sieve
  • Preparation method of mesoporous Y-type molecular sieve

Examples

Experimental program
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Effect test

Embodiment 1

[0036] According to 1Al 2 o 3 : 15SiO 2 : 16Na 2 O: 320H 2 O molar ratio, 8.2g NaOH was added to 55ml deionized water, stirred to a clear solution, 3.0g sodium metaaluminate was added to the above solution, then 35.8g water glass (modulus 2.5) was added, and the stirring was continued at room temperature until All dissolved, and then aged at 30°C for 20 hours to obtain the directing agent.

[0037] Treat NaY molecular sieves in glycerol at 190°C for 2 hours, the mass mixing ratio of Y molecular sieves and glycerin is 1:5, and then treat the obtained glycerin mixture, inorganic directing agent and N,N-dimethyl-N-[3 -(trimethoxysilyl)propyl]octadecyl ammonium chloride, ethanol and carboxyethyl cellulose pre-mixed solution with a degree of polymerization of 1500 were mixed at 80°C for 1 hour, Y-type molecular sieve, inorganic directing agent and N,N— The mass mixing ratio of dimethyl-N-[3-(trimethoxysilyl)propyl]octadecyl ammonium chloride, ethanol and carboxymethyl cellulos...

Embodiment 2

[0048] According to 1Al 2 o 3 : 15SiO 2 : 16Na 2 O: 320H 2 O molar ratio, 8.2g NaOH was added to 55ml deionized water, stirred to a clear solution, 3.0g sodium metaaluminate was added to the above solution, then 35.8g water glass (modulus 2.5) was added, and the stirring was continued at room temperature until All dissolved, and aged at 30°C for 20 hours to obtain the directing agent.

[0049] Treat NaY molecular sieves in glycerin at 200°C for 2 hours, the mass mixing ratio of Y molecular sieves and glycerin is 1:4, and then treat the obtained glycerin mixture, inorganic directing agent and N,N-dimethyl-N-[3 -(Trimethoxysilyl)propyl]octadecyl ammonium chloride, ethanol and carboxymethyl cellulose pre-mixed solution with a degree of polymerization of 200 were mixed at 80°C for 1 hour, Y-type molecular sieve, inorganic directing agent and N,N— The mass mixing ratio of dimethyl-N-[3-(trimethoxysilyl)propyl]octadecyl ammonium chloride, ethanol and carboxymethyl cellulose is ...

Embodiment 3

[0053] According to 1Al 2 o 3 : 15SiO 2 : 16.5Na 2 O: 320H 2 The molar ratio of O, 9.4g of water glass (modulus 3.3) was added to 6.9g of sodium metaaluminate solution, stirred to dissolve, and then aged at 45°C for 5 hours to obtain the directing agent.

[0054] Treat NaY molecular sieves in glycerin at 190°C for 2 hours. The mass mixing ratio of Y molecular sieves and glycerin is 1:6. -(trimethoxysilyl)propyl]octadecyl ammonium chloride, ethanol and carboxymethyl cellulose pre-mixed solution with a degree of polymerization of 500 were mixed at 80°C for 1 hour, Y-type molecular sieve, inorganic guiding agent and N,N— The mass mixing ratio of dimethyl-N-[3-(trimethoxysilyl)propyl]octadecyl ammonium chloride, ethanol and carboxymethyl cellulose is 1:0.2:0.3:5:0.5, and then sealed Treat the mixture at 100°C for 12 hours in a reaction kettle, filter the mixture, wash with water, and dry at 100°C for 5 hours, and then roast it at 550°C for 5 hours to obtain a molecular sieve ...

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Abstract

A preparation method of a mesoporous Y-type molecular sieve is characterized by comprising: mixing a Y-type molecular sieve with glycerol at 150-200 DEG C for 0.5-5 h, mixing the obtained glycerol treated liquid mixture with an inorganic guiding agent, a quaternary ammonium compound, ethanol and cellulose at 30-80 DEG C for 0.5-2 h, placing the mixture in a reactor, treating at 80-120 for 2-20 hours, and recycling the product to obtain the mesoporous Y-type molecular sieve, wherein the mass ratio of the Y-type molecular sieve to the glycerol is 1:(2-15), and the mass ratio of the Y-type molecular sieve to the inorganic guiding agent, quaternary ammonium compound, ethanol and cellulose is 1:(0.1-10):(0.02-1):(0.1-10):(0.005-1).

Description

technical field [0001] The invention relates to a method for preparing a mesoporous Y-type molecular sieve, and more specifically relates to a method for modifying a Y-type molecular sieve to obtain a mesoporous Y-type molecular sieve. Background technique [0002] Y-type molecular sieves (HY, REY, USY) have been the main active components of catalytic cracking (FCC) catalysts since they were first used in the 1960s. However, with the intensification of heavy crude oil, the content of polycyclic compounds in FCC feedstock increased significantly, but its diffusion capacity in zeolite channels decreased significantly. In order to overcome the defects of conventional microporous molecular sieves, reducing the crystal size of molecular sieves and introducing mesopores into molecular sieve crystals can effectively improve their diffusion properties. Compared with traditional microporous molecular sieves, mesoporous molecular sieves have excellent internal and external diffusion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
Inventor 李文林达志坚罗一斌郑金玉
Owner CHINA PETROLEUM & CHEM CORP
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