Effect of Aging Method on the Synthesis of MCM-22 Zeolite in Fluoride System

Abstract

Abstract: Zeolite MCM-22 was synthesized hydrothermally under static conditions using NaF and hexamethyleneimine as the mineralizing agent and template, respectively. The effects of aging processes (static aging, stirred aging, and ultrasonic aging) on the synthesis of zeolite MCM-22 were investigated. All the above aging treatment methods accelerated the formation of MCM-22, and the ultrasonic aging showed the best effect. The aging treatment with ultrasound noticeably broadened the range of SiO2/Al2O3 molar ratio (the SiO2/Al2O3 molar ratio of the final gel was 20[KG-45x]-[KG-20x]100), shortened the crystallization time to 48～62 h, and changed the morphology of MCM-22 in the fluoride system.

Key words: MCM-22 zeolite, sodium fluoride, ultrasound, aging, synthesis

WU Jianmei, WANG Baoyu, LI Niu, XIANG Shouhe*. Effect of Aging Method on the Synthesis of MCM-22 Zeolite in Fluoride System[J]. Chinese Journal of Catalysis, 2006, 27(7): 585-590.

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https://www.cjcatal.com/EN/Y2006/V27/I7/585

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Effect of Aging Method on the Synthesis of MCM-22 Zeolite in Fluoride System

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