ZSM-5/Magadiite/mordenite coexisting material and method for synthesizing same

Abstract

The invention relates to a ZSM-5 / Magadiite / mordenite 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 and nonadjustable in pore-size distribution. The method prepares the ZSM-5 / Magadiite / mordenite coexisting material. A mole relation of the components of the synthesized ZSM-5 / Magadiite / mordenite coexisting material is nSiO2 :Al2O3, wherein n is between 10 and 2,000; the ZSM-5 / Magadiite / mordenite coexisting material has three coexisting phases; the XRD diffraction pattern of the ZSM-5 / Magadiite / mordenite coexisting material comprises a technical proposal that a maximum value of a distance d is at positions between 15.73-0.1 and 15.73+0.1 A, 13.52-0.1 and 13.52+0.1 A, 11.22-0.2 and 11.22+0.2 A, 9.96-0.1 and 9.96+0.1 A, 8.96-0.1 and 8.96+0.1 A, 7.73-0.1 and 7.73+0.1 A, 6.71-0.1 and 6.71+0.1 A, 5.99-0.1 and 5.99+0.1 A, 5.14-0.1 and 5.14+0.1 A, 4.51-0.1 and 4.51+0.1 A, 3.98-0.05 and 3.98+0.05 A, 3.86-0.05 and 3.86+0.05 A, 3.66-0.1 and 3.66+0.1 A, 3.47-0.05 and 3.47+0.05 A, 3.30-0.05 and 3.30+0.05 A, 3.14-0.1 and 3.14+0.1, and 2.99-0.05 and 2.99+0.05 A; therefore, the problems are solved well. The ZSM-5 / Magadiite / mordenite coexisting material can be used in the industrial production of ethylene and propylene through the catalytic pyrolysis of naphtha and ethylene and propylene through the dehydration of methanol.

Description

technical field

[0001] The invention relates to a ZSM-5 / Magadiite / mordenite symbiotic material and a synthesis method thereof. Background technique

[0002] ZSM-5 and mordenite porous materials are widely used in petrochemical and other fields due to their good shape-selective catalytic performance and good thermal stability. However, due to the uniform and single pore diameter of the mordenite material, the pore diameter is not easy to adjust at will, and complex components cannot be processed. Magadiite is a two-dimensional layered structure material. Its laminates are composed of negatively charged Si-0 tetrahedra, so it has good thermal stability. Magadiite has some typical properties of charged layered structure materials, such as water As well as the adsorption of some small polar organic molecules, there are hydrated sodium ions that can be exchanged between the layers, and the layers have good expansibility, which can accommodate molecules or groups ranging from pro...

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