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1

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

Wróblewska A., Fajdek A., Milchert E., Grzmil B.

Polish Journal of Chemical Technology

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2010

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Vol. 12, nr 1

29-34

EN

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.

2

Application of Ti-MCM-48 catalyst in 1-butene-3-ol epoxidation

Wróblewska A., Wajzberg J.

Czasopismo Techniczne. Chemia

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2008

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R. 105, z. 2-Ch

265-273

EN

The influence of technological parameters on 1-butene-3-ol (1B3O) epoxidation over Ti-MCM-48 catalyst has been presented. A 30 wt% H[2]O[2] was used as an oxidizing agent in the presence of solvent (methanol). The epoxidation was carried out at autogenic pressure. The major product of epoxidation was 1,2-epoxybutane-3-ol (1,2EB3), an epoxide compound with a lot of applications.

PL

W artykule przedstawiono wpływ parametrów technologicznych na epoksydację 1-buten-3-olu (1B3O) na katalizatorze Ti-MCM-48. Jako utleniacz zastosowano 30% nadtlenek wodoru w obecności metanolu jako rozpuszczalnika. Epoksydację prowadzono pod ciśnieniem autogenicznym. Głównym produktem epoksydacji był 1,2-epoksybutan-3-ol (1,2EB3), związek epoksydowy o licznych zastosowaniach.

3

The pressure method of 1-butene-3-ol epoxidation over Ti-beta catalyst

Wróblewska A., Wajzberg J., Milchert E., Grzmil B., Ziebro J.

Polish Journal of Chemical Technology

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2007

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Vol. 9, nr 2

53-56

EN

The investigations of 1-buten-3-ol (1B3O) epoxidation by 30% hydrogen peroxide over Ti-Beta catalyst were performed. The experiments were carried out under the autogenic pressure and at the presence of methanol as a solvent. The influence of the following technological parameters on the course of epoxidation: temperature (20 - 120°C), the molar ratio of 1B3O/H2O2 (0.5:1 - 5:1), methanol concentration (5 - 90 wt%.), Ti-Beta concentration (0.1 - 5.0 wt%) and the reaction time (0.5 - 5.0 h) was investigated. The main functions describing the process were: the selectivity of transformation to 1,2-epoxy-3-butanol in relation to 1B3O consumed, conversions of substrates as well as the selectivity of transformation to organic compounds in relation hydrogen peroxide consumed.

4

The new method of 1,2-epoxy-3-butanol production over titanium silicalite catalysts

Wajzberg J., Wróblewska A.

Polish Journal of Chemical Technology

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2007

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Vol. 9, nr 2

49-52

EN

The results of 1-butene-3-ol (1B3O) epoxidation over the titanium silicalite catalysts: TS-1, Ti-Beta, Ti-MCM-41 has been presented. The optimal parameters obtained for the individual catalyst were compared. The main functions describing the process were: the selectivity of transformation to 1,2-epoxy-3-butanol (1,2E3B) in relation to 1B3O consumed, the conversions of 1B3O and hydrogen peroxide and the selectivity of the transformation to organic compounds in relation to the H2O2 consumed. The main product of the epoxidation process was 1,2-epoksy-3-butanol, the chemical compounds having a lot of applications.

5

Epoxidation of 1-buten-3-ol under atmospheric pressure over the Ti-Beta catalyst

Wróblewska A., Wajzberg J.

Polish Journal of Chemical Technology

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2007

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Vol. 9, nr 2

110-113

EN

The results of 1-buten-3-ol (1B3O) epoxidation with 30% hydrogen peroxide over the Ti-Beta catalyst were presented. The studies were performed under the atmospheric pressure and at the presence of methanol as a solvent. There was examined the influence of the following parameters: the temperature (0 - 60°C), the molar ratio of 1B3O/H2O2 (1:1 - 5:1), methanol concentration (5 - 90 wt%), the Ti-Beta catalyst concentration (0.1 - 5.0 wt%) and the reaction time (0.5 - 5.0 h). The optimal parameters were determined by using the following functions: the selectivity of the transformation to 1,2-epoxy-3-butanol (1,2E3B) in relation to 1B3O consumed, the selectivity of the transformation to organic compounds in relation to hydrogen peroxide consumed, the conversions of 1B3O and hydrogen peroxide. The main product of epoxidation was 1,2-epoxy-3-butanol, epoxide having several applications.

6

Titanium silicalite catalysts in low-waste technologies

Wróblewska A., Milchert E.

Polish Journal of Chemical Technology

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2004

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Vol. 6, nr 3

48-51

EN

The investigations on titanium silicalite catalysts and their applications are reviewed. The characteristics of titanium silicalite catalysts: TS-1, TS-2, Ti-BETA, Ti-MCM-41 and Ti-MCM-48 was briefly discussed. Their usefulness was verified in the epoxidation reactions of the unsaturated compounds with the ethylene bond and in the hydroxylation of phenol to hydroquinone and pyrocatechol. The allyl and methallyl alcohol and methallyl chloride were subjected to the epoxidation. These technologies fulfill the requirements of modern trends in the chemical technology: green chemistry and low-waste productions.