Synthesis of *BEA-type molecular sieves using mesoporous materials as reagents

被引：42

作者：

Takewaki, T ^{[1
]}

Hwang, SJ ^{[1
]}

Yamashita, H ^{[1
]}

Davis, ME ^{[1
]}

机构：

[1] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 1999年 / 32卷 / 03期

关键词：

*BEA-type materials; mesoporous materials; silica;

D O I：

10.1016/S1387-1811(99)00113-4

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A new method for synthesizing *BEA-type molecular sieves that involves the use of mesoporous materials as reagents is presented. Si-Beta (pure-silica, *BEA-type molecular sieve) is synthesized by heating TEAOH-impregnated Si-MCM-41 to 150 degrees C for several days. The Si-Beta obtained has a small number of Q(3) sites that are mostly siloxy groups that balance the charge of TEA cations. TEA cations can easily be removed by contacting the Si-Beta with acetic acid solution, and as a result, a highly hydrophobic Si-Beta is formed. Ti-Beta is synthesized from Ti-containing mesoporous silica or Ti-impregnated Si-MCM-41 without adding Al3+, alkali-metal cations and seeds. The incorporation of Ti into the *BEA structure is confirmed by UV-vis data. *BEA-type materials that contain other species such as Al, B, V, Zr and Zn can also be prepared. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：265 / 278

页数：14

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