Pillared layered mordenite, and preparation method thereof

A mordenite and layered technology is applied to the preparation of swellable layered mordenite and its swelling and pillaring, and the field of pillared layered mordenite and its preparation can solve the problem of low crystallinity of mordenite and difficulty in controlling mesopores structure and distribution to avoid damage
CN106517239AInactive Publication Date: 2017-03-22NORTHWEST UNIV(CN)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWEST UNIV(CN)
Publication Date
2017-03-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a pillared layered mordenite, and a preparation method thereof. According to the preparation method, silica sol is taken as a silicon source, sodium metaaluminate is taken as an aluminium source, hexamethylene imine is taken as a templating agent, dynamic hydrothermal synthesis is adopted to synthesize a swellable layered mordenite, the swellable layered mordenite is subjected to swelling with hexadecyl polyoxyethylene hexadecyl ammonium bromide, and an obtained swelled layered mordenite is reacted with tetraethoxysilane for pillaring so as to obtain the pillared layered mordenite. The preparation method is capable of obtaining the pillared layered mordenite with a novel structure; swelling and pillaring are carried out under mild conditions; destroy of high temperature and high pH value on molecular sieve skeleton and acid sites is avoided; the adopted swelling agent is cheap and easily available; and industrialized production is realized.
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Description

technical field

[0001] The invention belongs to the technical field of molecular sieves and porous materials, and in particular relates to a pillared layered mordenite and a preparation method thereof, including the preparation of a swellable layered mordenite and its swelling and pillaring method. Background technique

[0002] Mordenite is a typical microporous molecular sieve material with uniform pore structure, suitable acidity and good hydrothermal stability. It has become an important petrochemical catalytic material, especially in alkylation, hydroisomerization, Dewaxing and other reactions. However, mordenite is composed of interconnected twelve-membered ring channels (0.67nm×0.70nm) and eight-membered ring channels (0.34nm×0.48nm). Due to the small eight-membered ring channels, most molecules are difficult to enter. Mordenite is generally considered to have a one-dimensional pore system, which tends to result in diffusion limitation. Therefore, in order to overcom...

Claims

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