High molecule polymer template synthetic composite hole zeolite molecular sieve and its preparing method

Abstract

The present invention relates to inorganic chemistry, physical chemistry and catalytic chemistry technology. The present invention prepares composite pore zeolite molecular sieve with common silicon source, aluminum source and hybrid metal atom source, and through hydrothermal treatment and calcinations process. In the hydrothermal treatment, material powder is prepared with composite template of mixture comprising quaternary ammonium salt polymer and organic amine or organic quaternary ammonium salt, or template of quaternary ammonium salt polymer. The hydrothermal treatment is in 100-180 deg c and has setting time of 1-7 days. The prepared molecular sieve m is then calcined at 300-800 deg c for 0.5-24 hr to obtain opened channels. The prepared molecular sieve has composite pore structure and high catalytic activity, and may have various metal atoms introduced. The prepared molecular sieve may be used widely as adsorbent, catalyst and catalyst carrier.

Description

technical field [0001] The invention belongs to the fields of inorganic chemistry, physical chemistry, material chemistry, catalytic chemistry and chemical engineering, and particularly relates to zeolite molecular sieve synthesized by template method and its preparation technology. Background technique [0002] As an important part of inorganic microporous crystal materials, molecular sieves are increasingly becoming the starting point for the research of new inorganic materials due to their unique pore structure and exchangeable cation positions. High-quality carrier of new materials such as electricity). In 1961, Barrer and Denny introduced tetramethyl cation into molecular sieve synthesis system and successfully synthesized Na-A molecular sieve with Si / Al>1 [see D.W.Breck, W.G.Eversole, and R.M.Milson, J.Chem.Soc. , 78, (1956), 2338. and D.W.Breck, and J.Y.Smith., Scienct.Am.200, 85, 1959], created the era of organic template synthesis of molecular sieves. Thus, var...

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Problems solved by technology

However, since zeolite molecular sieves have a smaller specific surface and narrower pores, the diffusion rate of catalytic reactions and the application of catalytic reactions involving macromolecules are greatly limited [see Corma, A.Chem.Rev.97, (1997) , 2373.]

For this reason, Mobil Company has invented MCM-41 series mesoporous molecular sieves [see Kresge, C.T., Leonowicz, M.E., Roth, W.J., Vartuli, J.C. & Beck, J.S.Nature 352, (1992), 710.], this kind of molecular sieve ratio The large surface area and large pore size overcome the shortcomings of zeolite molecular sieves to a certain extent, but due to the amorphous walls of mesoporous molecular sieves, their stability is low, their acidity is low, and their preparation costs are high. These factors limit the Further application of mesoporous molecular sieves [see Corma, A.Chem.Rev.97, (1997), 2373.]

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