Aldol condensation of butanal over alkali metal zeolites

Autor:	Edward J. Rode, Mohammad Bazargani, Linda N. Marquez, Paul E. Gee, Tetsuji Uemura
Rok vydání:	1991
Předmět:	Chemistry Inorganic chemistry General Chemistry Alkali metal Catalysis Metal Propene chemistry.chemical_compound Adsorption visual_art visual_art.visual_art_medium Aldol condensation Lewis acids and bases Zeolite
Zdroj:	Catalysis Letters. 9:103-113
ISSN:	1572-879X 1011-372X
DOI:	10.1007/bf00769088
Popis:	Alkali metal zeolites and metal oxides were used for the aldol condensation of n-butanal to 2-ethyl-2-hexenal. The order of activity at 150 °C and 1 atm. was: CsNaY > NaY > LiNaY > MgO >Al2O3. Selectivity to 2-ethyl-2-hexenal was 100% for both pure and mixed isomer feed. Infrared spectroscopic studies showed that stable catalysts were produced by propene pretreatments which blocked Lewis acid sites. Adsorption of ammonia and carbon dioxide on CsNaY during aldol condensation of n-butanal causes a decrease in rate. This result, along with the order of activity, suggests that the presence of both acid and basic sites produce higher activity than strongly basic MgO.
Databáze:	OpenAIRE
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