Synthesis of MCM-22 zeolite by an ultrasonic-assisted aging procedure

被引：69

作者：

Wang, Baoyu ^{[1
]}

Wu, Jianmei ^{[2
]}

Yuan, Zhong-Yong ^{[1
]}

Li, Niu ^{[1
]}

Xiang, Shouhe ^{[1
]}

机构：

[1] Nankai Univ, Inst New Catalyt Mat Sci, Coll Chem, Tianjin 300071, Peoples R China

[2] Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China

来源：

ULTRASONICS SONOCHEMISTRY | 2008年 / 15卷 / 04期

基金：

中国国家自然科学基金;

关键词：

MCM-22; zeolite; aging; ultrasound; hydrothermal crystallization;

D O I：

10.1016/j.ultsonch.2007.07.007

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The synthesis of MCM-22 zeolite under hydrothermal crystallization conditions has been performed by an ultrasonic-assisted aging procedure. The ultrasonic-assisted aging of the initial aluminosilicate gel can shorten the crystallization time of MCM-22, decrease the amount of hexamethyleneimine (HMI) used, and broaden the range of SiO2/Al2O3 ratios. By using the ultrasonic aging, pure phase of high-silica MCM-22 products with SiO2/Al2O3 > 100 can be obtained. When SiO2/Al2O3 <= 50, high crystalline MCM-22 zeolites with the reduced average crystal sizes can be made even with low HMI/SiO2 ratio of 0.05 under static crystallization conditions. The acoustic cavitation of the ultrasonic is believed to be responsible for these positive results due to its cracking the crystal seeds and improving the solubility of silicate species. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：334 / 338

页数：5

共 31 条

[1]

ABSIL RPL, 1992, Patent No. 5085762

[2] Synthesis and characterization of aluminosilicate MCM-22 in basic media in the presence of fluoride salts [J].

Aiello, R ;

Crea, F ;

Testa, F ;

Demortier, G ;

Lentz, P ;

Wiame, M ;

Nagy, JB .

MICROPOROUS AND MESOPOROUS MATERIALS, 2000, 35-6 :585-595

[3] Crystallization of potash alum: effect of power ultrasound [J].

Amara, N ;

Ratsimba, B ;

Wilhelm, AM ;

Delmas, H .

ULTRASONICS SONOCHEMISTRY, 2001, 8 (03) :265-270

[4]

BARRER RM, 1989, ACS S SER, V398

[5]

BECK JS, 2002, CATALYTIC SCI SERIES, V3, P223

[6] Effect of aluminum on the formation of zeolite MCM-22 and kenyaite [J].

Cheng, MJ ;

Tan, DL ;

Liu, XM ;

Han, XW ;

Bao, XH ;

Lin, LW .

MICROPOROUS AND MESOPOROUS MATERIALS, 2001, 42 (2-3) :307-316

[7] Alkylation of benzene with short-chain olefins over MCM-22 zeolite:: Catalytic behaviour and kinetic mechanism [J].

Corma, A ;

Martínez-Soria, V ;

Schnoeveld, E .

JOURNAL OF CATALYSIS, 2000, 192 (01) :163-173

[8] PROPOSED PORE VOLUME TOPOLOGY OF ZEOLITE MCM-22 BASED ON CATALYTIC TESTS [J].

CORMA, A ;

CORELL, C ;

LOPIS, F ;

MARTINEZ, A ;

PEREZPARIENTE, J .

APPLIED CATALYSIS A-GENERAL, 1994, 115 (01) :121-134

[9] The use of MCM-22 as a cracking zeolitic additive for FCC [J].

Corma, A ;

MartinezTriguero, J .

JOURNAL OF CATALYSIS, 1997, 165 (01) :102-120

[10] SOME EARLY RADIOTHERAPY OPTIMIZATION WORK [J].

CORMACK, AM .

INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY, 1995, 6 (01) :2-5

← 1 2 3 4 →