Number of the records: 1
Highly selective synthesis of campholenic aldehyde over Ti-MWW catalysts by α-pinene oxide isomerization
- 1.
SYSNO ASEP 0493777 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Highly selective synthesis of campholenic aldehyde over Ti-MWW catalysts by α-pinene oxide isomerization Author(s) Pitínová-Štekrová, Martina (UFCH-W)
Eliášová, P. (CZ)
Weissenberger, T. (DE)
Shamzhy, Mariya (UFCH-W) RID, ORCID
Musilová, Zuzana (UFCH-W)
Čejka, Jiří (UFCH-W) RID, ORCID, SAISource Title Catalysis Science &Technology. - : Royal Society of Chemistry - ISSN 2044-4753
Roč. 8, č. 18 (2018), s. 4690-4701Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords aldehydes ; Catalyst selectivit ; α-pinene oxide Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA17-01440S GA ČR - Czech Science Foundation (CSF) Institutional support UFCH-W - RVO:61388955 UT WOS 000448144600013 EID SCOPUS 85053733647 DOI 10.1039/C8CY01231H Annotation Campholenic aldehyde is a highly valuable fine chemical that can be obtained by multistep synthesis from monoterpene α-pinene isolated from turpentine oil. Therefore, economical and environmentally benign synthesis of this aldehyde is of great interest. In this study, different titanosilicates were prepared and tested in selective campholenic aldehyde synthesis via isomerization of α-pinene oxide. Titanosilicates with MWW zeolitic structure were synthesized directly and compared with Ti impregnated SBA-15 and commercial titanium silicalite-1. The catalysts were thoroughly characterized and compared in terms of their catalytic activity and selectivity toward the desired aldehyde in isomerization reactions performed either in toluene as a solvent at 70 °C or in N,N-dimethylacetamide at 140 °C. Ti-MWW catalysts showed very high catalytic activity with total conversion of α-pinene oxide. The highest selectivity to campholenic aldehyde, being 96% at the total conversion, was reached over the Ti-MCM-22 catalyst in toluene at 70 °C. This result substantially exceeds any other results published so far in the literature. The great catalytic performance of Ti-MCM-22 was attributed to the combination of the presence of isolated tetrahedrally coordinated Ti species, which act as crucial Lewis acid centres, the absence of undesired Brønsted acidity, and the MWW architecture that facilitates the formation of the target aldehyde.
Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2019
Number of the records: 1