Aldol condensation of benzaldehyde with heptanal using solid-supported caesium and potassium catalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F16%3A43902551" target="_blank" >RIV/60461373:22310/16:43902551 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3184/146867816X14701512496355" target="_blank" >http://dx.doi.org/10.3184/146867816X14701512496355</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3184/146867816X14701512496355" target="_blank" >10.3184/146867816X14701512496355</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Aldol condensation of benzaldehyde with heptanal using solid-supported caesium and potassium catalysts

Popis výsledku v původním jazyce

In this work, the possibility of using different heterogeneous basic catalysts in the aldol condensation of benzaldehyde and heptanal was tested. The solid basic catalysts were magnesium and calcium oxide, and different zeolites (HY, NaY, USY). Other catalysts were prepared - caesium-modified zeolites and MCM-41 and potassium-modified alumina. The basic properties of the used catalysts were studied using acid-base titration and temperature programmed desorption of carbon dioxide. Several techniques (UV-Vis and infrared spectroscopy, X-ray diffraction, nitrogen physisorption) were used to characterise the catalysts. These catalysts were used in the aldol condensation of benzaldehyde and heptanal, to test the influence of catalyst type, solvent, ratio of reactants and temperature on the course of reaction. Caesium and potassium leaching from catalysts was also monitored using atomic absorption spectroscopy. The best results were obtained using magnesium oxide (96% heptanal conversion, 68% selectivity to jasmine aldehyde), but all caesium- or potassium-modified catalysts showed reasonable results as well (caesium-MCM-41 40% heptanal conversion, 31% selectivity to jasmine aldehyde; potassium-alumina 62% heptanal conversion, 34% selectivity to jasmine aldehyde).

Název v anglickém jazyce

Aldol condensation of benzaldehyde with heptanal using solid-supported caesium and potassium catalysts

Popis výsledku anglicky

In this work, the possibility of using different heterogeneous basic catalysts in the aldol condensation of benzaldehyde and heptanal was tested. The solid basic catalysts were magnesium and calcium oxide, and different zeolites (HY, NaY, USY). Other catalysts were prepared - caesium-modified zeolites and MCM-41 and potassium-modified alumina. The basic properties of the used catalysts were studied using acid-base titration and temperature programmed desorption of carbon dioxide. Several techniques (UV-Vis and infrared spectroscopy, X-ray diffraction, nitrogen physisorption) were used to characterise the catalysts. These catalysts were used in the aldol condensation of benzaldehyde and heptanal, to test the influence of catalyst type, solvent, ratio of reactants and temperature on the course of reaction. Caesium and potassium leaching from catalysts was also monitored using atomic absorption spectroscopy. The best results were obtained using magnesium oxide (96% heptanal conversion, 68% selectivity to jasmine aldehyde), but all caesium- or potassium-modified catalysts showed reasonable results as well (caesium-MCM-41 40% heptanal conversion, 31% selectivity to jasmine aldehyde; potassium-alumina 62% heptanal conversion, 34% selectivity to jasmine aldehyde).

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CC - Organická chemie

OECD FORD obor

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Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Progress in Reaction Kinetics and Mechanism

ISSN

1468-6783

e-ISSN

—

Svazek periodika

41

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

289-300

Kód UT WoS článku

000384631800008

EID výsledku v databázi Scopus

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