Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

3 Polish Journal of Chemical Technology

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: 2-methylglycidol

Sortuj według:

Ogranicz wyniki do:

Ti-MCM-41 catalyst in environmentally friendly technologies

100%

Wróblewska A.

Polish Journal of Chemical Technology

2004

tom Vol. 6, nr 3

45-47

Four synthesis routes of the preparation of the hexagonal member of the M41S family, Ti-MCM-41, with a one-dimensional pore system were investigated. The syntheses were based on the methods applying mainly: tetraethoxysilane, tetrabutyltitanate, ethanol, water, ammonia, hydrogen peroxide and n-hexadecyltrimethylammonium bromide as template. The best method, which allowed achieving high cristallinity of the product and required smaller amount of materials and energy, was selected. The best sample of Ti-MCM-41 was tested in the liquid phase epoxidation of allyl and methallyl alcohol in methanol as a solvent. This is a new environmentally friendly method of the synthesis of epoxides.

Epoxidation of methallyl alcohol over Ti-Beta catalyst

100%

Wróblewska A. , Milchert E.

tom Vol. 8, nr 2

73-75

The epoxidation of methallyl alcohol (MAA) to 2-methylglycidol was carried out with 30 wt% hydrogen peroxide in an autoclave. The titanium silicalite catalyst Ti-Beta was used as a catalyst and methanol as a solvent. The effect of temperature (20- 120°C), the molar ratio MAA/H2O2 (1:1 - 5:1), methanol concentration (5 - 80 wt%), Ti-Beta concentration (0.1 - 2.0 wt%) and reaction time (0.5 - 5.0h) were studied. The optimum parameters were: temperature 100"C, the molar ratio MAA/H2O2 = 1:1, methanol concentration 5 wt%, Ti-Beta concentration 0.1 wt% and reaction time 0.5h.

Epoxidation of allylic compounds over Ti-MCM-48 catalyst

84%

Wróblewska A.

tom Vol. 8, nr 2

80-82

The results of the epoxidation of allylic compounds (allyl alcohol, methallyl alcohol and methallyl chloride) to corresponding epoxides (glycidol, 2-methylglycidol and 2-methylepichlorohydrin, respectively) with hydrogen peroxide over Ti-MCM-48 catalyst have been presented. The epoxidation was carried out with 30 wt% hydrogen peroxide in methanol used as a solvent in an autoclave. The optimum technological parameters (temperature, the molar ratio allylic compound/H2O2, methanol concentration, Ti-MCM-48 concentration and reaction time) for the epoxidation of each allylic compound were presented.