Solvent Influence on Selectivity in <i>α</i>-Pinene Oxide Isomerization Using MoO<sub>3</sub>-Modified Zeolite BETA
Natural source turpentine is an available source of <i>α</i>-pinene oxide. This compound’s value is especially given by the possibility of producing important compounds campholenic aldehyde and <i>trans</i>-carveol. In this work, we would like to present the usage of MoO<s...
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MDPI AG
2020-10-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/10/11/1244 |
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| author | Eva Vrbková Eliška Vyskočilová Miloslav Lhotka Libor Červený |
| author_facet | Eva Vrbková Eliška Vyskočilová Miloslav Lhotka Libor Červený |
| author_sort | Eva Vrbková |
| collection | DOAJ |
| description | Natural source turpentine is an available source of <i>α</i>-pinene oxide. This compound’s value is especially given by the possibility of producing important compounds campholenic aldehyde and <i>trans</i>-carveol. In this work, we would like to present the usage of MoO<sub>3</sub>-modified zeolite BETA in α-pinene oxide isomerization concerning campholenic aldehyde and <i>trans</i>-carveol formation using a wide range of solvents. Catalyst calcination temperature also influenced the reaction course (selectivity to desired compounds and reaction rate). MoO<sub>3</sub>-zeolite BETA was prepared by the wet impregnation method and characterized by different techniques. The use of polar aprotic solvents had the most positive effect on the reaction course. Solvent basicity and polarity considerably influenced the reaction rate and selectivity to particular products. The combination of high basicity and the high polarity was the most suitable for the studied reaction from the reaction rate point of view. Selectivity to campholenic aldehyde and <i>trans</i>-carveol was the most influenced by solvent basicity. Higher solvent basicity caused the preferential formation of <i>trans</i>–carveol, influence on selectivity to campholenic aldehyde formation was the opposite. The described catalyst may be used for <i>α</i>-pinene oxide rearrangement to both desired products dependently on the used solvent. Molybdenum offers an exciting alternative for previously described modifications of zeolites for this reaction. |
| first_indexed | 2024-03-10T15:17:48Z |
| format | Article |
| id | doaj.art-66164bd1b0b9416988de4b487dd26475 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T15:17:48Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-66164bd1b0b9416988de4b487dd264752023-11-20T18:48:13ZengMDPI AGCatalysts2073-43442020-10-011011124410.3390/catal10111244Solvent Influence on Selectivity in <i>α</i>-Pinene Oxide Isomerization Using MoO<sub>3</sub>-Modified Zeolite BETAEva Vrbková0Eliška Vyskočilová1Miloslav Lhotka2Libor Červený3Department of Organic Technology, University of Chemistry and Technology, 16628 Prague, Czech RepublicDepartment of Organic Technology, University of Chemistry and Technology, 16628 Prague, Czech RepublicDepartment of Inorganic Technology, University of Chemistry and Technology, 16628 Prague, Czech RepublicDepartment of Organic Technology, University of Chemistry and Technology, 16628 Prague, Czech RepublicNatural source turpentine is an available source of <i>α</i>-pinene oxide. This compound’s value is especially given by the possibility of producing important compounds campholenic aldehyde and <i>trans</i>-carveol. In this work, we would like to present the usage of MoO<sub>3</sub>-modified zeolite BETA in α-pinene oxide isomerization concerning campholenic aldehyde and <i>trans</i>-carveol formation using a wide range of solvents. Catalyst calcination temperature also influenced the reaction course (selectivity to desired compounds and reaction rate). MoO<sub>3</sub>-zeolite BETA was prepared by the wet impregnation method and characterized by different techniques. The use of polar aprotic solvents had the most positive effect on the reaction course. Solvent basicity and polarity considerably influenced the reaction rate and selectivity to particular products. The combination of high basicity and the high polarity was the most suitable for the studied reaction from the reaction rate point of view. Selectivity to campholenic aldehyde and <i>trans</i>-carveol was the most influenced by solvent basicity. Higher solvent basicity caused the preferential formation of <i>trans</i>–carveol, influence on selectivity to campholenic aldehyde formation was the opposite. The described catalyst may be used for <i>α</i>-pinene oxide rearrangement to both desired products dependently on the used solvent. Molybdenum offers an exciting alternative for previously described modifications of zeolites for this reaction.https://www.mdpi.com/2073-4344/10/11/1244<i>α</i>-Pinene oxidecampholenic aldehydetrans-carveolisomerizationMoO<sub>3</sub>-zeolite BETA |
| spellingShingle | Eva Vrbková Eliška Vyskočilová Miloslav Lhotka Libor Červený Solvent Influence on Selectivity in <i>α</i>-Pinene Oxide Isomerization Using MoO<sub>3</sub>-Modified Zeolite BETA Catalysts <i>α</i>-Pinene oxide campholenic aldehyde trans-carveol isomerization MoO<sub>3</sub>-zeolite BETA |
| title | Solvent Influence on Selectivity in <i>α</i>-Pinene Oxide Isomerization Using MoO<sub>3</sub>-Modified Zeolite BETA |
| title_full | Solvent Influence on Selectivity in <i>α</i>-Pinene Oxide Isomerization Using MoO<sub>3</sub>-Modified Zeolite BETA |
| title_fullStr | Solvent Influence on Selectivity in <i>α</i>-Pinene Oxide Isomerization Using MoO<sub>3</sub>-Modified Zeolite BETA |
| title_full_unstemmed | Solvent Influence on Selectivity in <i>α</i>-Pinene Oxide Isomerization Using MoO<sub>3</sub>-Modified Zeolite BETA |
| title_short | Solvent Influence on Selectivity in <i>α</i>-Pinene Oxide Isomerization Using MoO<sub>3</sub>-Modified Zeolite BETA |
| title_sort | solvent influence on selectivity in i α i pinene oxide isomerization using moo sub 3 sub modified zeolite beta |
| topic | <i>α</i>-Pinene oxide campholenic aldehyde trans-carveol isomerization MoO<sub>3</sub>-zeolite BETA |
| url | https://www.mdpi.com/2073-4344/10/11/1244 |
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