C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 29/80 (2006.01) C07C 31/20 (2006.01)
Patent
CA 2516639
The present invention is a process for purification of 1,3-propanediol (PDO) by an inverted distillation sequence which comprises: (a) optionally removing water or other solvents from the crude 1,3-propanediol mixture; (b) distilling the crude 1,3-propanediol mixture under conditions which maximize the separation of components of the mixture which are heavier than 1,3-propanediol from the 1,3-propanediol and the components which are lighter than 1,3- propanediol; (c) drawing off a stream which contains at least most of the 1,3- propanediol and at least some of the components of the mixture which are lighter than 1,3-propanediol; and (d) distilling the stream of (c) to separate the 1,3-propanediol from components in the stream which are lighter than 1,3- propanediol and any residual components which are heavier than 1,3-propanediol.
La présente invention concerne un procédé de purification de 1,3-propanediol (PDO) par le biais d'une séquence de distillation inversée. Ledit procédé consiste à (a) éliminer facultativement l'eau et d'autres solvants du mélange de 1,3-propanediol brut, (b) distiller le mélange de 1,3-propanediol brut dans des conditions qui permettent de maximiser la séparation des composés du mélange qui sont plus lourds que 1,3-propanediol de 1,3-propanediol et des composés qui sont plus légers que 1,3-propanediol, (c) extraire un flux qui contient au moins la plus grande partie de 1,3-propanediol et au moins quelques composés du mélange qui sont plus légers que 1,3-propanediol, et (d) distiller le flux provenant de l'étape (c) afin de séparer 1,3-propanediol des composés se trouvant le flux qui sont plus légers que 1,3-propanediol et tout composé résiduel qui est plus lourd que 1,3-propanediol.
Fan Tseng-Pu
Powell Joseph Broun
Weider Paul Richard
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Shell Internationale Research Maatschappij B.v.
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