ChemInform Abstract: CIT-5: A High-Silica Zeolite with 14-Ring Pores.

✍ Scribed by P. WAGNER; M. YOSHIKAWA; M. LOVALLO; K. TSUJI; M. TASPATSIS; M. E. DAVIS

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 32 KB
• Volume: 29
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199808241

✦ Synopsis

1998 ion exchange, zeolites, molecular sieves, crown ethers, clays ion exchange, zeolites, molecular sieves, crown ethers, clays V 1350

08 -241

CIT-5: A High-Silica Zeolite with 14-Ring Pores.

-CIT-5, a novel extra-large pore zeolite is synthesized under hydrothermal conditions from mixtures containing LiOH using N(16)-methylsparteinium as organic structure directing agent. In the absence of Al 2 O 3 pure-silica CIT-5 can be formed. According to the synchrotron powder XRD data the structure of this sample (orthorhombic, space group Imma) is composed of one-dimensional extra-large pores of nearly circular cross section consisting of 14-T-atom membered rings (tetrahedrally coordinated Si atoms). The calcined materials remain crystalline to ¿ 900