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Y/ZSM-12 composite molecular sieve and preparation method thereof

A ZSM-12, composite molecular sieve technology, applied in molecular sieve catalysts, catalyst activation/preparation, chemical instruments and methods, etc., can solve problems such as failure to synthesize

Inactive Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology still fails to synthesize a compound molecular sieve product in which two crystal phases of Y-type molecular sieve and ZSM-12 molecular sieve are in one product

Method used

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  • Y/ZSM-12 composite molecular sieve and preparation method thereof
  • Y/ZSM-12 composite molecular sieve and preparation method thereof
  • Y/ZSM-12 composite molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 0.65g of sodium hydroxide and 10.4g of TEABr and dissolve them in 37.0ml of deionized water, then add 10.0g of Y-type molecular sieves while stirring, stir for half an hour, then add 20.0ml of silica sol, stir for 2 hours, then move to a closed stainless steel reaction kettle . Crystallize at 138° C. for 5 days to obtain a molecular sieve product, which is a Y / ZSM-12 composite crystal phase molecular sieve through analysis.

[0019] Synthetic material ratio: 1.18Na 2 O: 10.5SiO 2 :2.25TEABr:Al 2 o 3 : 144H 2 O.

Embodiment 2

[0021] Weigh 0.65g of sodium hydroxide and 10.4g of TEABr and dissolve them in 37.0ml of deionized water, then add 10.0g of Y-type molecular sieves while stirring, stir for half an hour, then add 20.0ml of silica sol, stir for 2 hours, then move to a closed stainless steel reaction kettle . After crystallization at 139°C for 4.5 days, a molecular sieve product was obtained, and analysis showed that the molecular sieve product was a Y / ZSM-12 composite crystal phase molecular sieve.

[0022] Synthetic material ratio: 1.18Na 2 O: 10.5SiO 2 :2.25TEABr:Al 2 o 3 : 144H 2 O.

Embodiment 3

[0024] Weigh 0.65g of sodium hydroxide and 10.2g of TEABr and dissolve them in 37.0ml of deionized water, then add 10.0g of Y-type molecular sieves while stirring, stir for half an hour, then add 20.0ml of silica sol, stir for 2 hours, then move to a closed stainless steel reaction kettle . After crystallization at 140°C for 4.5 days, a molecular sieve product was obtained, and analysis showed that the molecular sieve product was a Y / ZSM-12 composite crystal phase molecular sieve.

[0025] Synthetic material ratio: 1.18Na 2 O: 10.5SiO 2 :2.21TEABr:Al 2 o 3 : 144H 2 O.

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Abstract

The invention relates to a Y / ZSM-12 composite molecular sieve and a preparation method thereof. The composite molecular sieve is provided with a Y molecular sieve crystal phase and a ZSM-12 molecular sieve crystal phase. The preparation method for the composite molecular sieve includes the following steps: Y-type molecular sieve powder is added into solution containing sodium hydroxide and tetraethylammonium bromide, a silicon source is added, a reaction mixture gel system is obtained after uniform stirring, the molar ratio of the mixture of the reaction mixture gel system is (1.16 to 1.21) Na2O:(9.0 to 11.0) SiO2:(2.20 to 2.30) TEABr:Al2O3:(135 to 150) H2O, the reaction mixture is crystallized under a hermetic condition and at the temperature of 130 DEG C to 150 DEG C for 4 to 7 days, and thereby the Y / ZSM-12 composite molecular sieve is obtained. The composite molecular sieve provided by the invention is a new product, and can be used in a variety of catalytic processes.

Description

technical field [0001] The invention relates to a composite molecular sieve and its synthesis technology, specifically synthesizing Y-type molecular sieves and ZSM-12 molecular sieve crystal phases 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] In 1973, Rosinski and Rubin of Mobil Laboratory in the United States synthesized ZSM-12 molecular sieve for the first time. Its structure type is MTW type, and...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J37/08
Inventor 秦波张喜文凌凤香张志智孙万付
Owner CHINA PETROLEUM & CHEM CORP
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