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Three-crystalline phase composite molecular sieve and preparation method thereof

A composite molecular sieve and molecular sieve technology, which is applied in molecular sieve catalysts, chemical instruments and methods, bulk chemical production, etc., can solve problems such as failure to synthesize

Active Publication Date: 2010-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But above-mentioned prior art still fails to synthesize the composite molecular sieve of Y-type molecular sieve, Beta zeolite, ZSM-12 molecular sieve three crystal phases in one product

Method used

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  • Three-crystalline phase composite molecular sieve and preparation method thereof
  • Three-crystalline phase composite molecular sieve and preparation method thereof
  • Three-crystalline phase composite molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 5.4g of sodium hydroxide and 100g of TEABr and dissolve them in 325ml of deionized water, then add 144g of Y-type molecular sieves while stirring, and then add 40ml of concentrated ammonia water after mixing evenly, stir for half an hour, then add 205ml of silica sol, stir for 2 hours, and then move to In a closed stainless steel reactor. Crystallize at 140° C. for 7 days to obtain a molecular sieve product. Proportion: 1.07Na 2 O: 9.0 SiO 2 : 1.5TEABr : 3.25NH 4 OH:Al 2 o 3 : 100H 2 O.

Embodiment 2

[0024] Weigh 5.4g of sodium hydroxide and 100g of TEABr and dissolve them in 305ml of deionized water, then add 144g of Y-type molecular sieve while stirring, and then add 60ml of concentrated ammonia water after mixing evenly, stir for half an hour, then add 205ml of silica sol, stir for 2 hours, and then move to In a closed stainless steel reactor. Crystallize at 145° C. for 5 days to obtain a molecular sieve product. Proportion: 1.07Na 2 O: 9.0 SiO 2 : 1.5TEABr : 4.88NH 4 OH:Al 2 o 3 : 100H 2 O.

Embodiment 3

[0026] Weigh 5.8g of sodium hydroxide and 100g of TEABr and dissolve them in 330ml of deionized water, then add 144g of Y-type molecular sieves while stirring, and then add 40ml of concentrated ammonia water after mixing evenly, stir for half an hour, then add 205ml of silica sol, stir for 2 hours and then move to In a closed stainless steel reactor. Crystallize at 140° C. for 7 days to obtain a molecular sieve product. Proportion: 1.08Na 2 O: 9.0 SiO 2 : 1.5TEABr : 3.25NH 4 OH:Al 2 o 3 : 101H 2 O.

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Abstract

The invention relates to a three-crystalline phase composite molecular sieve. The composite molecular sieve has a Y molecular sieve crystalline phase, a Beta zeolite crystalline phase and a ZSM-12 molecular sieve crystalline phase. A preparation method for the three-crystalline phase composite molecular sieve comprises the following steps of: adding Y molecular sieve powder into solution containing sodium hydroxide and tetraethylammonium bromide; selectively adding ammonia water, adding a silicon source, and stirring uniformly to obtain a reaction mixture gel system, wherein the molar ratio in the reaction mixture gel system is: 0.90-1.15 Na2O:8.0-15.0 SiO2:0.8-2.0TEABr:0-8.0 NH4OH:AL2O3:80-102 H2O; crystallizing the reaction mixture under the closed condition at 130 to 160 DEG C for 5 to 10 days to obtain a Y-Beta-ZSM-12 composite molecular sieve. The composite molecular sieve is a new product and can be used for various catalytic processes.

Description

technical field [0001] The invention relates to a three-crystal phase composite molecular sieve and its synthesis technology. Specifically, Y-type molecular sieve, Beta zeolite and ZSM-12 molecular sieve crystal phases are simultaneously synthesized in a composite molecular sieve. Background technique [0002] Y-type molecular sieve is formed by faujasite cages interpenetrating with each other along three crystal axis directions through twelve-membered rings. It is an excellent catalyst active component, not only has high cracking activity, but also has good selectivity. Therefore, the invention of Y-type molecular sieve has epoch-making significance in the field of catalysis. Due to its good hydrothermal stability and acid stability with high silicon-aluminum ratio, Y-type molecular sieve has been widely used as a catalytic material in the chemical industry. [0003] Beta zeolite was first synthesized by Mobil Corporation in 1967. Due to the long-term failure to solve the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/70B01J29/08
CPCY02P20/52
Inventor 张喜文秦波凌凤香孙万富张志智
Owner CHINA PETROLEUM & CHEM CORP
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