A kind of preparation method containing mesopore high crystallinity Y-type molecular sieve

A technology of high crystallinity and molecular sieve, applied in the direction of crystalline aluminosilicate zeolite, octahedral crystalline aluminosilicate zeolite, etc., can solve the problems of high price of template agent, complex process, low crystallinity, etc., and achieve obvious mesopore characteristics , less dosage, high crystallinity effect

Active Publication Date: 2021-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In summary, the preparation of Y-type molecular sieves containing mesopores in the prior art is complicated, the process is long, the price of the template agent is high, and the degree of crystallinity is low

Method used

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  • A kind of preparation method containing mesopore high crystallinity Y-type molecular sieve
  • A kind of preparation method containing mesopore high crystallinity Y-type molecular sieve
  • A kind of preparation method containing mesopore high crystallinity Y-type molecular sieve

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preparation example Construction

[0020] The preparation method of Y-type molecular sieve containing mesopore and high crystallinity provided by the present invention is characterized in that the preparation method comprises:

[0021] Preparation of crystallization directing agent: according to Al 2 o 3 :(1~35)SiO2 2 :(10~35)Na 2 O:(180~400)H 2 The molar ratio of O is to mix silicon source, aluminum source and water, and then carry out static aging at 0-80°C to obtain a crystallization directing agent;

[0022] Mixing cationic starch template modified by 2,3-epoxypropyltrimethylammonium chloride with a degree of substitution of 0.01% to 10% with alkali source and water, the cationic starch template agent, alkali source and water The mass ratio is (0.1~5):(0.1~3):(1~100), and then hydrolyzed at 30~150°C to obtain the hydrolyzate;

[0023] According to Al 2 o 3 :(1~20)SiO2 2 :(1~10)Na 2 O:(120~300)H 2 The molar ratio of O, the reactive silica-alumina gel obtained by fully mixing the crystallization dir...

Embodiment 1

[0040] According to Al 2 o 3 :15SiO2 2 :16.5Na 2 O:320H 2 O molar ratio, 30ml of water glass (modulus 3.3) was added to 20.8ml of sodium metaaluminate solution, stirred to dissolve, and then aged at 30°C for 20 hours to obtain a crystallization directing agent.

[0041] Take 2g of YZA-2 cationic starch (2,3-epoxypropyltrimethylammonium chloride substitution degree 0.5%) in 60g of water, add 1g of NaOH, stir evenly, heat up to 60°C, stir at constant temperature for 1h for hydrolysis treatment.

[0042] Then add the above 18g of guiding agent to 65ml of water glass (modulus 3.3), stir for 0.5h, then add 40ml of aluminum sulfate and 18ml of sodium metaaluminate, continue stirring for 1h after adding, and put the mixture into a stainless steel crystallization kettle , after being airtight, put it in an oven at 90°C for 12 hours of crystallization, then take it out and cool it (precursor).

[0043] Add the YZA-2 cationic starch aqueous solution after the above hydrolysis treat...

Embodiment 2

[0054] According to Al 2 o 3 :15SiO2 2 :16.5Na 2 O:320H 2 O molar ratio, 30ml of water glass (modulus 3.3) was added to 20.8ml of sodium metaaluminate solution, stirred to dissolve, and then aged at 30°C for 20 hours to obtain a crystallization directing agent.

[0055] Take 1g of YZA-1 cationic starch (2,3-epoxypropyltrimethylammonium chloride substitution degree 1%), put it in 60g of water, add 0.5g of NaOH, stir evenly, heat up to 40°C, stir at constant temperature for 1h to hydrolyze deal with.

[0056] Then add 12g of the above-mentioned guiding agent to 50ml of water glass (modulus 3.3), stir for 0.5h, then add 30ml of aluminum sulfate and 10ml of sodium metaaluminate, continue stirring for 1h after adding, and put the mixture into a stainless steel crystallization kettle After airtight, put it in an oven at 80°C for 10 hours of crystallization, take it out and cool it, then add the YZA-1 cationic starch aqueous solution after the above hydrolysis treatment, stir fo...

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Abstract

A method for preparing a Y-type molecular sieve with mesopores and high crystallinity, characterized in that the preparation method comprises: modifying 2,3-epoxypropyltrimethylammonium chloride with a degree of substitution of 0.01% to 10% The cationic starch template is mixed with an alkali source and water to hydrolyze to obtain a hydrolyzate, and a step of secondary crystallization.

Description

technical field [0001] The present invention relates to a preparation method of a Y-type molecular sieve, more specifically, the present invention relates to a preparation method of a Y-type molecular sieve with mesopores and high crystallinity. Background technique [0002] Y-type molecular sieves for conventional industrial applications mainly include HY with a relatively high silicon-aluminum ratio, dealuminated ultra-stabilized USY, and REY or REUSY for rare earth exchange for catalytic cracking reactions. Fluid catalytic cracking (FCC) is an important process in the secondary processing of crude oil. With the heavy and poor quality of crude oil, the excellent properties of Y-type molecular sieves with mesopores and high crystallinity gradually emerged. The Y-type molecular sieve with mesopores and high crystallinity has a micropore and mesopore dual-pore model pore distribution structure, combining mesoporous materials (excellent diffusion performance) and microporous ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/24
CPCC01B39/24C01P2002/72C01P2006/12C01P2006/14
Inventor 王成强郑金玉罗一斌舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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