Super-macroporous silicate molecular sieve NUD-1 and preparation method thereof

Abstract

The invention discloses a super-macroporous silicate molecular sieve material and a preparation method thereof, the molecular sieve has the X ray powder diffraction characteristic shown in Table 1, is obtained by hydrothermal synthesis method, has a three-dimensional pore structure of 18 * 12 * 10, good thermal stability, and larger specific surface area, can be incorporated into heteroatom, and has potential application values in petrochemistry, fine chemical engineering and life science and other fields.

Description

technical field [0001] The invention belongs to the field of crystalline microporous materials, and in particular relates to a novel structure ultra-large microporous silicate molecular sieve material and a preparation method thereof. Background technique [0002] Molecular sieve materials are a class of TO 4 (T stands for oxidation state atoms with +4 or +3 valence in general, such as Si, P, Al, B, Ge, Ga, etc.) A type of inorganic microporous solid material composed of tetrahedrons sharing vertices. Usually, the composition of molecular sieves can be represented by the following empirical chemical formula: x(M 1 / n XO 2 )·yYO 2 ·zR·qH 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 ...

AI Technical Summary

Problems solved by technology

However, it is well known that the crystallization of macroporous and ultra-large pore silicate molecular sieves is very difficult, and the number of silicate molecular sieve materials with ultra-large pore structures that have been synthesized is very limited. There are only five kinds of porous silicate molecular sieve materials, which are ITQ-37 with 30-membered rings [J.Sun, C.Bonneau, A.Cantin, A.Corma, M.J.Diaz-Cabanas, M.Moliner, D.Zhang, M.Li, X.Zou, Nature, 2009,458,1154-1157], ITQ-43 of 28-membered ring [J.Jiang, J.L.Jorda, J.Yu, L.A.Baumes, E.Mugnaioli, M.J.Diaz-Cabanas, U.Kolb, A.Corma, Science, 2011, 333, 1131-1134] and ITQ-33 of 18-membered ring [A.Corma, M.J.Diaz-Cabanas, J.L.Jorda, C.Martinez, M.Moliner, Nature2006, 443, 842 -845], ITQ-44 [J.Jiang, J.L.Jorda, M.J.Diaz-Cabanas, J.Yu, and A.Corma, Angew.Chem.Int.Ed.2010, 49, 4986–4988] and ECR-34 [ K.G.Strohmaier, D.E.W.Vaughan, J.Am.Chem.Soc.2003,125,16035-16039]

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