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Agnieszka Wróblewska, Anna Fajdek and Eugeniusz Milchert

Epoxidation of crotyl alcohol in the presence of titanium silicalite Ti-MWW catalyst — the new and friendly method of 2,3-epoxybutane-1-ol synthesis

Epoxidation of crotyl alcohol (CA) with 30 wt% hydrogen peroxide over Ti-MWW catalyst has been studied with methanol as a solvent and at autogenic pressure. The influence of temperature in the range of 20-120°C, the molar ratio of CA/H2O2 1:1-5:1, methanol concentration 5-90 wt%, Ti-MWW catalyst concentration 0.0-5.0 wt% and the reaction time 5-300 min have been studied. The main product of CA epoxidation is 2,3-epoxybutane-1-ol (2,3EB1O), a compound with many applications.

Open access

Agnieszka Wróblewska, Anna Fajdek and Eugeniusz Milchert

Synthesis and characteristics of titanium silicalite TS-1, Ti-Beta and Ti-MWW catalysts

The synthesis methods of the following titanium-silicalite catalysts: TS-1, Ti-Beta and Ti-MWW were presented. The results of the analyses of the catalysts by XRD, SEM and IR, UV-vis methods were also shown. A brief description of the catalytic performances of these catalysts in the oxidation process of olefins, alkenes, alcohols and aromatic compounds was presented.

Open access

Agnieszka Wróblewska, Anna Fajdek, Eugeniusz Milchert and Barbara Grzmil

The Ti-MWW catalyst - its characteristic and catalytic properties in the epoxidation of allyl alcohol by hydrogen peroxide

Ti-MWW, one of the latest titanium-silicalite catalysts, has been prepared by direct hydrothermal synthesis using hexamethyleneimine as a structure-directing agent. The characteristic of the catalyst was performed by means of the following methods: XRD, SEM, IR, UV-vis and X'Ray microanalysis. The catalytic properties of Ti-MWW have been compared with those of the conventional titanium-silicalites TS-1 and TS-2 in the epoxidation of allyl alcohol with hydrogen peroxide. The process has been described by the following main functions: the selectivity of the transformation to glycidol in relation to allyl alcohol consumed, the conversions of the substrates (allyl alcohol and hydrogen peroxide) and the selectivity of the transformation to organic compounds in relation to hydrogen peroxide consumed.