Wyniki wyszukiwania - BazTech

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Isolation of 1,2-epoxybutane-3-ol and 2,3-epoxybutane-1-ol from post-reaction mixtures

Wróblewska A., Wajzberg-Prokowska J., Ławro E., Milchert E.

Polish Journal of Chemical Technology

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2010

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Vol. 12, nr 2

29-32

EN

Attempts were made to isolate 1,2-epoxybutane-3-ol and 2,3-epoxybutane-1-ol from post-reaction mixtures left after the epoxidation of 1-butene-3-ol and 2-butene-1-ol with hydrogen peroxide by thin film distillation. From the raw mixture containing about 8.3 wt% of the epoxide at the first stage the concentration of epoxide is increased to 32 wt%. At the second stage of distillation the epoxide fraction is concentrated to about 76 wt%. After the third stage of thin film distillation the epoxide fraction of 99.6% purity can be obtained. The concentration of this fraction by azeotropic distillation with n-propanol as an azeotropic agent permits obtaining epoxide of 99.6 wt% purity.

2

Epoxidation of crotyl alcohol over titanium silicate TS-2 catalyst

Wróblewska A., Ławro E., Milchert E.

Czasopismo Techniczne. Chemia

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2008

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R. 105, z. 2-Ch

275-282

EN

The results of epoxidation of 2-butene-1-ol with 30 wt.% hydrogen peroxide have been presented. Methanol was used as a solvent. The process was carried out over titanium silicalite catalyst TS-2. The influence of temperature (20-120.C), molar ratio of crotyl alcohol/H[2]O[2] (5:1-5:1), methanol concentration (5-90 wt.%), catalyst concentration (0.1-5.0 wt.%) and reaction time (30-300 min.) were investigated. The obtained results were utilized for determination of optimum conditions of running 2-butene-1-ol epoxidation process.

PL

W artykule przedstawiono wyniki badań epoksydacji 2-buten-1-olu 30% nadtlenkiem wodoru. Jako rozpuszczalnik zastosowano metanol. Proces prowadzono na katalizatorze tytanowo- silikalitowych TS-2. Zbadano wpływ: temperatury (20-120.C), stosunku molowego alkohol krotylowy/H[2]O[2] (5:1-5:1), stężenia metanolu (5-90% wag.), stężenia katalizatora (0,1-5,0% wag.) i czasu reakcji (30-300 min). Otrzymane wyniki posłużyły do określenia optymalnych parametrów prowadzenia procesu epoksydacji 2-buten-1-olu.

3

Epoxidation of 2-buten-1-ol over Ti-MCM-41 and Ti-MCM-48 titanium silicalite catalysts

Wróblewska A., Ławro E., Milchert E.

Polish Journal of Chemical Technology

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2007

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Vol. 9, nr 3

1-4

EN

The results of the epoxidation of 2-buten-1-ol with 30 wt% hydrogen peroxide have been presented. As a solvent methanol was used. The process was carried out over the titanium silicalite catalysts: Ti-MCM-41 and Ti-MCM-48. The influence of temperature (20 - 120°C). the molar ratio of CRA/H2O2 (5:1 - 5:1), methanol concentration (5 - 90 wt%), catalyst concentration (0.1 - 5.0 wt%) and the reaction time (30 -300 min) was investigated. The obtained results were used for the determination of optimum conditions of running the epoxidation process of 2-buten-1-ol.

4

Epoksydacja 2-buten-1-olu na katalizatorze TS-1

Wróblewska A., Milchert E., Ławro E.

Przemysł Chemiczny

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2006

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T. 85, nr 8-9

687-690

PL

Przedstawiono wyniki badań doświadczalnych procesu epoksydacji 2-buten-1-olu (alkohol krotylowy, AKR) 30-proc. nadtlenkiem wodoru, przebiegającej w metanolu (rozpuszczalnik) w obecności katalizatora tytanowo-silikalitowego TS-1. Przedstawiono zastosowania otrzymywanego w tym procesie 2,3-epoksybutan-1-olu.

EN

2-Buten-1-ol on (1:1 by mole) epoxidation with aq. 30% H2O2 (1 atm, 60°C, 60 min) run over 0.1% of a titanium-silicalite (TS-1) catalyst in 80% MeOH as solvent, gave 2,3-epoxy-1-butanol in 93% yield, and 100% selectivity. Possible applns. of the product are given.