Mordenite/beta zeolite/analcime porous coexisting material and method for synthesizing same

Abstract

The invention relates to a mordenite / beta zeolite / analcime porous coexisting material and a method for synthesizing the same, and mainly solves the problems that a porous material synthesized by the prior art is single in pore-size, weak in acid and low in activity. The method prepares the porous coexisting material by well controlling the nucleating and growing process of a molecular sieve during a synthesis process of porous material. The coexistence phase ratio of the porous coexisting material is adjustable, and a mole relation of the components of the synthesized porous coexisting material is nSiO2 :Al2O3, wherein n is between 4 and 400; the porous coexisting material has more than three phases; the XRD diffraction pattern of the porous coexisting material comprises a technical proposal that a maximum value of a distance d is at positions between 13.52-0.1 and 13.52+0.1 A,11.32-0.1 and 11.32+0.1 A, 9.47-0.1 and 9.47+0.1 A, 8.96-0.1 and 8.96+0.1 A, 7.07-0.1 and 7.07+0.1 A, 6.71-0.1 and 6.71+0.1 A, 4.51-0.1 and 4.51+0.1 A, 4.15-0.1 and 4.15+0.1 A, 3.98-0.05 and 3.98+0.05 A, 3.76-0.05 and 3.76 +0.05 A, 3.65-0.05 and 3.65+0.05 A, 3.53-0.02 and 3.53+0.02 A, 3.47-0.02 and 3.47+0.02 A, 3.31-0.05 and 3.31+0.05 A, and 3.02-0.05 and3.02+0.05 A; therefore, the problems are solved well. The mordenite / beta zeolite / analcime porous coexisting material can be used in the industrial production of ethylene and propylene through the catalytic pyrolysis of naphtha.

Description

technical field

[0001] The invention relates to a mordenite / beta zeolite / alalcite porous symbiotic material and a preparation method thereof. Background technique

[0002] Beta zeolite and mordenite (MOR) porous materials are widely used in petrochemical and other fields due to their good shape-selective catalytic performance and good thermal stability. However, because the two molecular sieve materials have uniform and single pore size, weak acidity, low activity and poor selectivity, they cannot process complex components separately, and their catalytic properties for the same reactant are different. The porous symbiotic material containing more than two components has a multi-level pore structure and a wide range of strong and weak acids. It can handle complex components with different molecular diameters and can exert their synergistic catalytic effect.

[0003] Documents CN1565967A and CN1565970A report that ZSM-5 or mordenite is used as a seed crystal and added to the...

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