Contribution to MoO3–SiO2 and WO3–SiO2 utilization—active catalysts in jasmine aldehyde, 2-hexyl-1,3-dioxolane and methyllaurate synthesis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F20%3A43920268" target="_blank" >RIV/60461373:22310/20:43920268 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007%2Fs11144-020-01727-6" target="_blank" >https://link.springer.com/article/10.1007%2Fs11144-020-01727-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11144-020-01727-6" target="_blank" >10.1007/s11144-020-01727-6</a>

Result language

angličtina

Original language name

Contribution to MoO3–SiO2 and WO3–SiO2 utilization—active catalysts in jasmine aldehyde, 2-hexyl-1,3-dioxolane and methyllaurate synthesis

Original language description

Several types of mixed molybdenum and tungsten oxide—SiO2 materials were prepared using sol–gel and wet impregnation method. In all cases, four different loading of MoO3 or WO3 (1, 10, 25 and 40 wt%) were prepared. Materials were characterized using X-ray diffraction, X-ray fluorescence spectroscopy and its acidity was determined by temperature programmed desorption of pyridine. Catalytic activity of these materials was tested in three model reactions providing valuable fine chemicals— aldol condensation, acetalization and esterification. These reactions are usually catalyzed by homogenous catalysts. With increasing interest in environmental protection these catalysts are replaced by heterogeneous ones—offering easy separation from reaction mixture and a possibility of catalyst reuse. More specifically the chosen reactions were: aldol condensation of benzaldehyde with heptanal giving jasmine aldehyde (1), acetalization of heptanal by ethylene glycol giving 2-hexyl- 1,3-dioxolane (2) and esterification of lauric acid by methanol giving methyllaurate (3). The prepared materials proved to be catalytically active in above mentioned reactions—in aldol condensation was the best result (78% heptanal conversion, 58% selectivity to jasmine aldehyde, 24 h) obtained using Mo 40 material prepared by impregnation. This material showed to be the best together with W 40 material prepared by sol–gel process in esterification (91 or 94% conversion, 24 h). Acetalization occurs very willingly, best results (heptanal conversion &gt; 90% and selectivity &gt; 90%, 5 h) was obtained using Mo and W 25 and 40 prepared by sol–gel and impregnation process.

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

2020

Confidentiality

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

Name of the periodical

Reaction Kinetics Mechanisms and Catalysis

ISSN

1878-5190

e-ISSN

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Volume of the periodical

129

Issue of the periodical within the volume

February 2020

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

13

Pages from-to

645-658

UT code for WoS article

000516207700003

EID of the result in the Scopus database

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