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Three-crystal phase composite molecular sieve and preparation method thereof

A composite molecular sieve, molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unavailability

Active 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

A simple combination of the above methods cannot obtain a compound molecular sieve product in which the three crystal phases of Y-type molecular sieve, beta zeolite and Mor zeolite are in one product.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take by weighing 0.60g sodium hydroxide and 10.0g tetraethylammonium bromide and dissolve in 36.0ml deionized water, then add 7.5g Y-type molecular sieves (molar ratio of silicon to aluminum is 5.1) while stirring, add 4.0ml ammoniacal liquor after stirring evenly In the mixture, after stirring evenly, add 20.0ml of silica sol, stir evenly, and transfer to a closed stainless steel reaction kettle. Ratio of each component of the mixture: 1.20Na 2 O: 12.3SiO 2 :Al 2 o 3 : 2.90TEABr : 3.6NH 4 OH: 204H 2 O. Crystallize at 140°C for 5.0 days to obtain a composite molecular sieve product, which is a Y-β-Mor triple crystal phase composite molecular sieve after analysis.

Embodiment 2

[0024] Take by weighing 0.58g sodium hydroxide and 10.0g tetraethylammonium bromide and be dissolved in 34.0ml deionized water, then add 7.5gY type molecular sieve (silicon-aluminum molar ratio is 5.1) while stirring, add 4.0ml ammoniacal liquor after stirring evenly In the mixture, after stirring evenly, add 20.0ml of silica sol, stir evenly, and transfer it into a closed stainless steel reaction kettle. The ratio of each component of the mixture: 1.19Na 2 O: 12.3SiO 2 :Al 2 o 3 : 2.90TEABr : 3.6NH 4 OH: 197H 2 O. Crystallize at 140°C for 4.5 days to obtain a composite molecular sieve product, which is a Y-β-Mor triple crystal phase composite molecular sieve after analysis.

Embodiment 3

[0026] Take by weighing 0.64g sodium hydroxide and 10.0g tetraethylammonium bromide and be dissolved in 40.0ml deionized water, then add 7.5gY type molecular sieve (silicon-aluminum molar ratio is 5.1) while stirring, add 4.0ml ammoniacal liquor after stirring evenly In the mixture, after stirring evenly, add 16.0ml of silica sol, stir evenly, and transfer it into a closed stainless steel reaction kettle. The ratio of each component of the mixture: 1.22Na 2 O: 10.9SiO 2 :Al 2 o 3 : 2.90TEABr : 3.6NH 4 OH: 204H 2 O. Crystallized at 140° C. for 4 days to obtain a composite molecular sieve product, which was analyzed as a Y-β-Mor three-phase composite molecular sieve.

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Abstract

The invention discloses a three-crystal phase composite molecular sieve and a preparation method thereof. The composite molecular sieve is provided with a Y-type molecular sieve crystal phase, a Beta zeolite crystal phase and a Mor zeolite crystal phase. The preparation method for the three-crystal phase composite molecular sieve includes the following steps: Y-type molecular sieve powder is added into solution containing sodium hydroxide and tetraethylammonium bromide, ammonia water is selectively added, 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 (1.18 to 1.24) Na2O:(8.5 to 13.0) SiO2:Al2O3:(2.75 to 3.10) TEABr:(1.0 to 4.0) NH4OH:(170 to 220) 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-Beta-Mor 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 three-crystal phase composite molecular sieve and a preparation method thereof, in particular to a composite molecular sieve comprising three molecular sieve crystal phases of Y-type molecular sieve, beta zeolite and Mor zeolite and a preparation method thereof. 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. High-silicon-aluminum ratio Y-type molecular sieve has good hydrothermal stability and acid stability, so it 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-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/08B01J29/70B01J29/18
Inventor 秦波凌凤香张喜文张志智孙万付
Owner CHINA PETROLEUM & CHEM CORP
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