Mg-Al-Zn MIXED OXIDES AS EFFECTIVE CATALYSTS IN ALDOL CONDENSATIONS

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mg-Al-Zn MIXED OXIDES AS EFFECTIVE CATALYSTS IN ALDOL CONDENSATIONS

Popis výsledku v původním jazyce

A mixed oxide with Mg:Al ratio 3:1 was prepared by co-precipitation at constant pH value. This material was mixed with different amounts of zinc oxide. Content of zinc oxide in prepared materials varied from 4.9 wt.% to 47.7 wt.%. Prepared Mg-Al-Zn mixed oxides were analyzed using different techniques (XRF, ICP) to determine Mg:Al:Zn molar ratio. These materials were used as catalysts in aldol condensation of heptanal with substituted benzaldehydes Activity and selectivity in these reactions were evaluated with accent to influence of zinc amount on reaction course. The reaction of heptanal with substituted benzaldehydes gives a desired product of cross-aldol condensation and undesired product of heptanal autocondensation. Experiments showed that adding the zinc oxide to the catalyst caused the increase of reaction rate. Influence of zinc oxide amount in catalyst to selectivity to cross-aldol and autocondensation product was negligible.

Název v anglickém jazyce

Mg-Al-Zn MIXED OXIDES AS EFFECTIVE CATALYSTS IN ALDOL CONDENSATIONS

Popis výsledku anglicky

A mixed oxide with Mg:Al ratio 3:1 was prepared by co-precipitation at constant pH value. This material was mixed with different amounts of zinc oxide. Content of zinc oxide in prepared materials varied from 4.9 wt.% to 47.7 wt.%. Prepared Mg-Al-Zn mixed oxides were analyzed using different techniques (XRF, ICP) to determine Mg:Al:Zn molar ratio. These materials were used as catalysts in aldol condensation of heptanal with substituted benzaldehydes Activity and selectivity in these reactions were evaluated with accent to influence of zinc amount on reaction course. The reaction of heptanal with substituted benzaldehydes gives a desired product of cross-aldol condensation and undesired product of heptanal autocondensation. Experiments showed that adding the zinc oxide to the catalyst caused the increase of reaction rate. Influence of zinc oxide amount in catalyst to selectivity to cross-aldol and autocondensation product was negligible.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10401 - Organic chemistry

Projekt

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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 statě ve sborníku

Proceedings of the 5th International Conference on Chemical Technology

ISBN

978-80-86238-65-4

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

5

Strana od-do

427-431

Název nakladatele

Česká společnost průmyslové chemie (ČSPCH)

Místo vydání

Praha

Místo konání akce

Mikulov

Datum konání akce

10. 4. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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