Nano-aggregated sheet-shaped mordenite

A technology of mordenite and mordenite, which is applied in the field of nano-aggregated sheet-shaped mordenite, can solve the problems of reducing the mass transfer rate of catalytic reactions, unfavorable catalytic activity, and agglomeration of nano-zeolite crystals into spherical shapes, achieving crystallinity and stability. Improve the effect of mass transfer and diffusion performance, regularity and patency improvement
CN107758685BActive Publication Date: 2020-09-04CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2020-09-04

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Abstract

The invention relates to synthesis of nanometer agglomerated sheet-shaped mordenite. In the prior art, during the synthesis of the conventional nanometer molecular sieve, a plurality of nanometer crystals are easily agglomerated to form spheres and other block-like aggregates due to the high surface energy, such that the diffusion speed is slow and the diffusion channel is not smooth in the actualapplication so as to seriously affect the reaction performance of the nanometer molecular sieve and affect the stability of the nanometer molecular sieve. A purpose of the present invention is to mainly overcome the problem in the prior art. According to the present invention, the nanometer agglomerated sheet-shaped mordenite can be efficiently synthesized by adding a small amount of the oxygen-containing organic solvent through the structure-directing action of the organic templating agent tetraethylammonium cation, wherein the composition and the dissociation equilibrium of the silicon-aluminum gel are controlled through the concentration of the tetraethylammonium radical in the synthesis system; and the nanometer agglomerated sheet-shaped mordenite synthesized through the technical scheme can be used for adsorption separation, catalytic conversion in petrochemical industry, and other fields.
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Description

technical field

[0001] The invention relates to a nano-aggregated sheet-shaped mordenite. Background technique

[0002] As one of the earliest zeolites recognized by humans, mordenite is a crystalline aluminosilicate with special acid distribution and regular mass transfer channels. And other petrochemical fields have important industrial application value. Mordenite crystals have a strong c-axis growth potential, which causes their channels to be too long along the 12MR direction, seriously affecting their mass transfer and diffusion efficiency. Reducing the size of molecular sieves to the nanoscale is an effective method to increase the external specific surface area of ​​molecular sieves and increase the mass transfer rate. Compared with micron-sized molecular sieves, the advantages of nano-sized molecular sieves are: (1) Larger specific surface area, more active centers, High surface energy, active unsaturated bonds on the outer surface, easy to adsorb molecules, and h...

Claims

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