Potassium modified alumina as a catalyst for aldol condensation of benzaldehyde with linear C3 ? C8 aldehydes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913219" target="_blank" >RIV/60461373:22310/17:43913219 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11144-017-1150-x" target="_blank" >http://dx.doi.org/10.1007/s11144-017-1150-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11144-017-1150-x" target="_blank" >10.1007/s11144-017-1150-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Potassium modified alumina as a catalyst for aldol condensation of benzaldehyde with linear C3 ? C8 aldehydes

Popis výsledku v původním jazyce

The different types of catalyst based on potassium modified alumina were prepared ? source of potassium was either potassium carbonate or potassium hydroxide. Prepared materials were characterizes by available methods ? UV-VIS spectroscopy, X Ray diffraction, thermogravimetry, nitrogen physisorption and tested as catalysts in aldol condensation of benzaldehyde with C3-C8 linear aldehydes. Some of the products may serve as important fragrant compounds ? especially jasmine aldehyde (prepared from heptanal) or 2-hexylcinnamylaldehyde (from octanal). It was found that the reaction rate increased with the increasing amount of potassium loaded on catalyst. It was found out that the reaction rate increased with decreasing length of aldehyde chain. The selectivity to autocondensation product increased with decreasing pore diameter of catalyst. Aldol condensation of benzaldehyde with propanal performed using alumina modified by 3.6 mmol potassium / g of material resulted in 97 % propanal conversion with 89 % selectivity to 2-methylcinnamylaldehyde and 6 % selectivity to 2-methylpent-2-enal. Aldol condensation of benzaldehyde with octanal performed using alumina modified by 1.5 mmol potassium / g of material resulted in 29 % propanal conversion with 17 % selectivity to 2 hexylcinnamylaldehyde and 82 % selectivity to 2-hexyldec-2-enal.

Název v anglickém jazyce

Potassium modified alumina as a catalyst for aldol condensation of benzaldehyde with linear C3 ? C8 aldehydes

Popis výsledku anglicky

The different types of catalyst based on potassium modified alumina were prepared ? source of potassium was either potassium carbonate or potassium hydroxide. Prepared materials were characterizes by available methods ? UV-VIS spectroscopy, X Ray diffraction, thermogravimetry, nitrogen physisorption and tested as catalysts in aldol condensation of benzaldehyde with C3-C8 linear aldehydes. Some of the products may serve as important fragrant compounds ? especially jasmine aldehyde (prepared from heptanal) or 2-hexylcinnamylaldehyde (from octanal). It was found that the reaction rate increased with the increasing amount of potassium loaded on catalyst. It was found out that the reaction rate increased with decreasing length of aldehyde chain. The selectivity to autocondensation product increased with decreasing pore diameter of catalyst. Aldol condensation of benzaldehyde with propanal performed using alumina modified by 3.6 mmol potassium / g of material resulted in 97 % propanal conversion with 89 % selectivity to 2-methylcinnamylaldehyde and 6 % selectivity to 2-methylpent-2-enal. Aldol condensation of benzaldehyde with octanal performed using alumina modified by 1.5 mmol potassium / g of material resulted in 29 % propanal conversion with 17 % selectivity to 2 hexylcinnamylaldehyde and 82 % selectivity to 2-hexyldec-2-enal.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10401 - Organic chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

REACTION KINETICS AND CATALYSIS LETTERS

ISSN

0133-1736

e-ISSN

—

Svazek periodika

121

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

307-316

Kód UT WoS článku

000401935400021

EID výsledku v databázi Scopus

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