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In recent years, many modifications in the synthesis procedure and catalytic applications of MCM-22 have been published [1¨C4], while little is reported about the properties of MCM-56, especially the catalytic applications. Fung [4] first reported the synthesis of MCM-56. As MCM-56 and MCM-22 all share the MWW structure[5], MCM-56 exhibited some similarities with MCM-22, including the sinusoidal network channel and a large number of 12 MR cups exposed to the crystal exterior [6]. MCM-56 can be thermally treated without affecting its layered structure, while the structure of as-made MCM-22 changed markedly after calcinations. Large supercages with an inner diameter of approximately 0.71 nm and a height of 1.82 nm appear in calcined MCM-22 [7].

[ Last edited by daiqiguang on 2007-3-22 at 09:56 ]
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Originally posted by zhangwengui330 at 2007-3-22 09:53:
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4Â¥2007-03-22 09:55:01
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ycf2005

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Preparation, characterization of MCM-56 and catalytic activity in one-step synthesis of MIBK from acetone  • SHORT COMMUNICATION
Catalysis Communications, Volume 6, Issue 2, February 2005, Pages 107-111
Piao Ping Yang, Jian Feng Yu, Zhen L¨¹ Wang, Mei Ping Xu, Qing Sheng Liu, Xu Wei Yang and Tong Hao Wu£»
Characterization and catalytic properties of MCM-56 and MCM-22 zeolites  • ARTICLE
Microporous and Mesoporous Materials, Volume 40, Issues 1-3, November 2000, Pages 9-23
Gopalakrishnan G. Juttu and Raul F. Lobo£»
Characterization and Catalytic Activity of MCM-22 and MCM-56 Compared with ITQ-2  • ARTICLE
Journal of Catalysis, Volume 191, Issue 1, 1 April 2000, Pages 218-224
A. Corma, U. Diaz, V. Forn¨¦s, J. M. Guil, J. Mart¨ªnez-Triguero and E. J. Creyghton£»
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