Aldol condensation of benzaldehyde and heptanal: a comparative study of laboratory and industrially prepared Mg-Al mixed oxides

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43916130" target="_blank" >RIV/60461373:22310/18:43916130 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22810/18:43916130

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/pdf/10.1002/jctb.5336" target="_blank" >https://onlinelibrary.wiley.com/doi/pdf/10.1002/jctb.5336</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/jctb.5336" target="_blank" >10.1002/jctb.5336</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Aldol condensation of benzaldehyde and heptanal: a comparative study of laboratory and industrially prepared Mg-Al mixed oxides

Popis výsledku v původním jazyce

Several layered double hydroxides (with Mg:Al ratio varying from 2:1 to 4:1) were prepd. by a co-pptn. method at const. pH value. The activity of lab. prepd. samples was compared with that of industrially prepd. layered double hydroxides with the same Mg/Al ratio in aldol condensation of benzaldehyde with heptanal. Characterization of all solid catalysts was performed using different techniques (ICP-MS, thermogravimetry, X-ray diffraction, DRIFT spectroscopy, nitrogen physisorption method, SEM). Acid-base properties of prepd. materials were investigated using ammonia (carbon dioxide, resp.) temp. programmed desorption. Heptanal conversion and selectivity to two main products, i.e., 2-pentylcinnamylaldehyde (jasmine aldehyde) and 2-pentylnon-2-enal, were monitored. All catalysts resulted in heptanal conversions higher than 95%. The highest selectivity to jasmine aldehyde (66% at 70% heptanal conversion, 46% theor. yield) was obtained using ESM 3:1 catalyst (100°, heptanal:benzaldehyde = 1:2 M, solvent-free synthesis).

Název v anglickém jazyce

Aldol condensation of benzaldehyde and heptanal: a comparative study of laboratory and industrially prepared Mg-Al mixed oxides

Popis výsledku anglicky

Several layered double hydroxides (with Mg:Al ratio varying from 2:1 to 4:1) were prepd. by a co-pptn. method at const. pH value. The activity of lab. prepd. samples was compared with that of industrially prepd. layered double hydroxides with the same Mg/Al ratio in aldol condensation of benzaldehyde with heptanal. Characterization of all solid catalysts was performed using different techniques (ICP-MS, thermogravimetry, X-ray diffraction, DRIFT spectroscopy, nitrogen physisorption method, SEM). Acid-base properties of prepd. materials were investigated using ammonia (carbon dioxide, resp.) temp. programmed desorption. Heptanal conversion and selectivity to two main products, i.e., 2-pentylcinnamylaldehyde (jasmine aldehyde) and 2-pentylnon-2-enal, were monitored. All catalysts resulted in heptanal conversions higher than 95%. The highest selectivity to jasmine aldehyde (66% at 70% heptanal conversion, 46% theor. yield) was obtained using ESM 3:1 catalyst (100°, heptanal:benzaldehyde = 1:2 M, solvent-free synthesis).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10401 - Organic chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Chemical Technology and Biotechnology

ISSN

0268-2575

e-ISSN

—

Svazek periodika

93

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

166-173

Kód UT WoS článku

000417508100021

EID výsledku v databázi Scopus

2-s2.0-85021347482