Highly selective synthesis of campholenic aldehyde over Ti- MWW catalysts by alpha-pinene oxide isomerization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10386101" target="_blank" >RIV/00216208:11310/18:10386101 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1039/c8cy01231h" target="_blank" >https://doi.org/10.1039/c8cy01231h</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c8cy01231h" target="_blank" >10.1039/c8cy01231h</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Highly selective synthesis of campholenic aldehyde over Ti- MWW catalysts by alpha-pinene oxide isomerization

Popis výsledku v původním jazyce

Campholenic aldehyde is a highly valuable fine chemical that can be obtained by multistep synthesis from monoterpene -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 -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 degrees C or in N,N-dimethylacetamide at 140 degrees C. Ti-MWW catalysts showed very high catalytic activity with total conversion of -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 degrees 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 BrOnsted acidity, and the MWW architecture that facilitates the formation of the target aldehyde.

Název v anglickém jazyce

Highly selective synthesis of campholenic aldehyde over Ti- MWW catalysts by alpha-pinene oxide isomerization

Popis výsledku anglicky

Campholenic aldehyde is a highly valuable fine chemical that can be obtained by multistep synthesis from monoterpene -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 -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 degrees C or in N,N-dimethylacetamide at 140 degrees C. Ti-MWW catalysts showed very high catalytic activity with total conversion of -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 degrees 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 BrOnsted acidity, and the MWW architecture that facilitates the formation of the target aldehyde.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA17-01440S" target="_blank" >GA17-01440S: Příprava pokročilých katalyzátoru ze stavebnicových jednotek</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Catalysis: Science and Technology

ISSN

2044-4753

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

4690-4701

Kód UT WoS článku

000448144600013

EID výsledku v databázi Scopus

2-s2.0-85053733647