Abstrakti
Liquid-phase hydrogenation of crotonaldehyde in non-polar and polar solvents was studied onmonometallic Pd, Pt, Ir, Re catalysts using mesoporous Sibunit and Al2O3 as supports. In the presenceof Pd the -C=C- bond of crotonaldehyde was preferably hydrogenated to form butanal, while butanaland crotyl alcohol are formed over Ir catalysts. Crotonaldehyde hydrogenation in 1,4-dioxane did notexhibit further butanal to butanol hydrogenation. Application of Re as a catalyst leads to formation ofcrotyl alcohol, with activity being, however, twofold lower than of Ir catalysts. Pt/C is almost inactive inthe hydrogenation of crotonaldehyde. Formation of crotyl alcohol occurs most efficiently over Ir/Al2O3in aprotic nonpolar solvents (decane), with selectivity to crotyl alcohol increasing with temperatureshowing 30% at 25% conversion under 180 °C and hydrogen pressure 0.84 MPa. Crotonaldehydehydrogenation in a polar protonic solvent (ethanol) results in butanal acetalization.
Alkuperäiskieli | Ei tiedossa |
---|---|
Sivut | 536–549 |
Julkaisu | Journal of Siberian Federal University. Chemistry |
Vuosikerta | 12 |
Numero | 4 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 2019 |
OKM-julkaisutyyppi | A1 Julkaistu artikkeli, soviteltu |
Keywords
- Ir
- Multiple unsaturated compounds
- Crotonaldehyde
- Crotyl alcohol
- Re
- PD
- alumina
- carbon
- Pt
- Competitive hydrogenation