A kind of preparation method of ultra-large porous silicate molecular sieve

Abstract

The invention discloses a preparation method for a super-macroporous silicate molecular sieve material. The molecular sieve material is obtained by utilizing a low-cost template agent and adopting a hydrothermal synthesis method. The prepared super-macroporous silicate molecular sieve has a UTD-1 structure, 14-ring pore channels in the direction of a crystal axis c and good thermal stability, canbe doped with heteroatoms, and has potential application value in the fields of petrochemistry, fine chemical engineering, life sciences and the like.

Description

technical field The invention belongs to the field of crystalline microporous materials, and in particular relates to a preparation method of an ultra-large microporous silicate molecular sieve material. Background technique Molecular sieve materials are a class of TO 4 (T represents the oxidation state atom with +4 valence or +3 valence usually, such as Si, P, Al, B, Ge, Ga, etc.) A type of inorganic microporous solid material composed of tetrahedra sharing vertices. Generally, the composition of molecular sieves can be represented by the following empirical chemical formula: p(M 1 / n XO 2 )·qYO 2 ·rR·wH 2 O, where M represents one or more +n-valent organic or inorganic cations; X represents one or more trivalent elements; Y represents one or more tetravalent elements, usually Si; R represents one or more an organic molecule. For a molecular sieve with a specific structure obtained by a specific synthesis method, whether it is a freshly synthesized product or a sample ...

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Problems solved by technology

However, the synthesis of this molecular sieve requires the use of a very expensive substituted cobaltocene as a template. When the molecular sieve is roasted, the template is transformed into CoO. It needs to be washed with acid to remove CoO to obtain a pure molecular sieve. The steps are cumbersome, which severely limits the application of the obtained molecular sieve.

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