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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10401 - Organic chemistry

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

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

Name of the periodical

REACTION KINETICS AND CATALYSIS LETTERS

ISSN

0133-1736

e-ISSN

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Volume of the periodical

121

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

307-316

UT code for WoS article

000401935400021

EID of the result in the Scopus database

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