A Facile Synthesis of SAPO-34 Molecular Sieves with Microwave Irradiation in Wide Reaction Conditions

作者：Jun Jong Won; Lee Ji Sun; Seok Hwi Young; Chang Jong San; Hwang Jin Soo; Jhung Sung Hwa^*

来源：Bulletin of the Korean Chemical Society, 2011, 32(6): 1957-1964.

DOI：10.5012/bkcs.2011.32.6.1957

• SAPO-34
• Microwave-synthesis
• CHA molecular sieve
• Acid catalysis
• TEAOH

Various reaction conditions including temperature, time and type and concentration of templates have been changed in order to facilely synthesize, especially with microwave (MW) heating, SAPO-34 molecular sieves. SAPO-34 molecular sieve can be synthesized rapidly with microwave irradiation from a gel containing tetracthylammonium hydroxide (TEAOH) as a template. However, other several templating molecules lead to SAPO-5 molecular sieve under microwave irradiation even though SAPO-34 is obtained by conventional electric synthesis from the same reactant gels. Moreover, SAPO-34 can be obtained more easily by increasing the TEAOH or silica concentration or by increasing the reaction temperature. SAPO-34 can be obtained within 5 min in a selected condition (high temperature of 210 degrees C) with microwave heating, which may lead to a continuous production of the important material. SAPO-34 synthesized by microwave irradiation is homogeneous and small in size and shows acidity and a stable performance in the dehydration of methanol and 2-butanol to olefins, suggesting potential applications in acid catalysis.

• 出版日期2011-6-20