Synthesis of propylene oxide from propylene and hydrogen peroxide catalyzed by titanium silicalite
- Eniricerche S.p.A., Milano (Italy)
- Enichem Synthesis, Milano (Italy)
The epoxidation of propylene with hydrogen peroxide in the liquid phase, in the presence of titanium silicalite catalyst (TS-1), is described. The best solvents are methonol and methanol/water mixtures. The temperature is normally between room temperature and 60{degree}C. Under these conditions, reaction rates are fast, yields on H{sub 2}O{sub 2} are quantitative, and selectivity to propylene oxide is very high. Propylene glycol and its monomethyl ethers and trace amounts of formaldehyde are the only by-products formed. Selectivity is further improved and the hydrolysis of the epoxide is almost suppressed when the residual acidity of the catalyst is completely neutralized. The activity of spent catalyst is recovered by calcining at 550{degree}C or, more simply, by washing with solvents. Complete activity recovery shows that Ti is not removed from the crystalline framework during the epoxidation reactions.
- OSTI ID:
- 5629067
- Journal Information:
- Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 129:1; ISSN 0021-9517; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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ALCOHOLS
ALDEHYDES
ALKENES
CALCINATION
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
EPOXIDES
ETHERS
FORMALDEHYDE
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROLYSIS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
LYSIS
MATERIALS
METALS
METHANOL
MINERALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PEROXIDES
PROPYLENE
PYROLYSIS
REACTION KINETICS
REGENERATION
SOLVENTS
SOLVOLYSIS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TITANIUM
TRANSITION ELEMENTS
WATER
ZEOLITES