C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 301/12 (2006.01)
Patent
CA 2453988
The invention relates to a method for producing propylene oxide, comprising at least the following steps: (a) propene is reacted with a hydroperoxide in a solvent in the presence of a zeolite catalyst, in order to obtain a mixture (G0), said mixture (G0) containing propylene oxide, solvent, non-reacted propene, non-reacted hydroperoxide and oxygen; (b) the propylene oxide is separated from the mixture (G0) in such a way that a mixture (G1) is obtained which comprises non-reacted propene and oxygen; (c) the mixture (G1) is brought into contact with a liquid medium containing at least solvent, in order to obtain the mixtures (G2) and (G3), said mixture (G3) containing a part of the non-reacted propene and oxygen, and said mixture (G2) containing the solvent and the rest of the propene, the separated mixture (G3) of non- reacted propene and oxygen having a ratio of oxygen to propene which renders the mixture (G3) non-inflammable, and the mixture (G2) supplying at least one reaction between the propene and the hydroperoxide.
La présente invention concerne un procédé destiné à la préparation d'oxyde de propylène, comprenant au moins les étapes suivantes: (a) conversion de propène avec un peroxyde d'hydrogène dans un solvant en la présence d'un catalyseur à zéolithe pour obtenir un mélange (G0), le mélange (G0) contenant de l'oxyde de propylène, du solvant, du propène non converti, du peroxyde d'hydrogène non converti et de l'oxygène; (b) séparation de l'oxyde de propylène du mélange (G0) de manière à obtenir un mélange (G1) qui comprend du propène non converti et de l'oxygène; (c) mise en contact du mélange (G1) par obtention des mélanges (G2) et (G3), avec un milieu liquide qui présente au moins un solvant, le mélange (G3) comprenant une partie du propène non converti et de l'oxygène, le mélange (G2) comprenant le solvant et le reste de propène, et le mélange de propène non converti et d'oxygène séparé (G3) ayant un rapport oxygène/propène qui rend le mélange (G3) non inflammable, et le mélange (G2) alimentant au moins une réaction entre du propène et du peroxyde d'hydrogène.
Bassler Peter
Berg Anne
Rehfinger Alwin
Rieber Norbert
Rudolf Peter
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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