The Role of Template Structure and Synergism between Inorganic and Organic Structure Directing Agents in the Synthesis of UTL Zeolite

0343596 - ÚFCH JH 2011 RIV US eng J - Journal Article
Shvets, O. V. - Kasian, N. - Zukal, Arnošt - Pinkas, Jiří - Čejka, Jiří
The Role of Template Structure and Synergism between Inorganic and Organic Structure Directing Agents in the Synthesis of UTL Zeolite.
Chemistry of Materials. Roč. 22, č. 11 (2010), s. 3482-3495. ISSN 0897-4756. E-ISSN 1520-5002
R&D Projects: GA ČR GA203/08/0604; GA ČR GA104/07/0383
Institutional research plan: CEZ:AV0Z40400503
Keywords : UTL zeolite * synthesis * zeolite molecular sietes
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 6.400, year: 2010

The extra-large-pore germanosilicates with UTL topology have been synthesized using a large variety of spiroazocompounds as structure-directing agents. Synthesis conditions were optimized and zeolites with a high crystallinity degree were obtained with 13 different organic structure-directing agents. The influence of the composition of the reaction mixture and template nature (structure, hydrophilicity/hydrophobicity balance, rigidity, pKa) on the phase selectivity, crystallinity degree, and adsorption properties of zeolites with UTL structure was investigated. Selection criteria of organic molecules as potential structure-directing agents (SDAs) in the synthesis of large-pore and extra-large-pore zeolites from silicate and germanosilicate media are proposed. The optimum synthesis time was determined to be 4−9 days for different SDA and (Si + Ge)/SDA molar ratios.
Permanent Link: http://hdl.handle.net/11104/0186041