Epoxidation of bulky organic molecules over pillared titanosilicates

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F15%3A00435064" target="_blank" >RIV/61388955:_____/15:00435064 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.cattod.2014.07.002" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2014.07.002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2014.07.002" target="_blank" >10.1016/j.cattod.2014.07.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Epoxidation of bulky organic molecules over pillared titanosilicates

Popis výsledku v původním jazyce

Layered and pillared TS-1 catalysts were prepared using surfactant C18H37-N+(CH3)2C6H12-N+(CH3)2C6H13 in the hydroxide form as a structure directing agent and silicon(IV) ethoxide or its mixture with titanium(IV) butoxide as a pillaring medium. The pillaring treatment significantly increases the specific surface area (BET up to 685 m2/g) and thus the accessibility of active centres for bulky molecules. The addition of tetrabutylorthotitanate into the pillaring mixture has a positive effect on the material performance as a catalyst of cyclooctene, norbornene and ?-pinene epoxidation under mild conditions, with hydrogen peroxide as the oxidant. Optimum composition of the pillaring medium is Si/Ti ratio 20. The highest yields of cyclooctene oxide (16.9% after 4 h) and norbonene oxide (14.8% after 4.5 h) were obtained using the above-prepared catalyst at 60 °C with substrate/catalyst mass ratio being 10 and substrate/H2O2 ratio being 2. Selective oxidation of verbenol to verbenone was obse

Název v anglickém jazyce

Epoxidation of bulky organic molecules over pillared titanosilicates

Popis výsledku anglicky

Layered and pillared TS-1 catalysts were prepared using surfactant C18H37-N+(CH3)2C6H12-N+(CH3)2C6H13 in the hydroxide form as a structure directing agent and silicon(IV) ethoxide or its mixture with titanium(IV) butoxide as a pillaring medium. The pillaring treatment significantly increases the specific surface area (BET up to 685 m2/g) and thus the accessibility of active centres for bulky molecules. The addition of tetrabutylorthotitanate into the pillaring mixture has a positive effect on the material performance as a catalyst of cyclooctene, norbornene and ?-pinene epoxidation under mild conditions, with hydrogen peroxide as the oxidant. Optimum composition of the pillaring medium is Si/Ti ratio 20. The highest yields of cyclooctene oxide (16.9% after 4 h) and norbonene oxide (14.8% after 4.5 h) were obtained using the above-prepared catalyst at 60 °C with substrate/catalyst mass ratio being 10 and substrate/H2O2 ratio being 2. Selective oxidation of verbenol to verbenone was obse

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/GBP106%2F12%2FG015" target="_blank" >GBP106/12/G015: Vývoj nových nanoporézních adsorbentů a katalyzátorů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

—

Svazek periodika

243

Číslo periodika v rámci svazku

APR 2014

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

134-140

Kód UT WoS článku

000347049900018

EID výsledku v databázi Scopus

2-s2.0-84904778167