C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 311/72 (2006.01)
Patent
CA 2454367
The invention relates to a method for treating a product stream containing vitamin E acetate, consisting of the following stages: a) the product stream is fed to a thin-film evaporator, falling-film evaporator or flash evaporator and a stream predominantly containing vitamin E acetate is drawn off as a bottom stream from said evaporator; b) the vapour stream from stage a) is fed to a partial condensation consisting of at least two stages. The invention also relates to falling-film evaporators for separating substance mixtures, whereby one or more heat exchangers are directly integrated into the vapour chamber of the falling-film evaporator.
L'invention concerne un procédé de traitement d'un flux de produit contenant de l'acétate de vitamine E, consistant a) à acheminer le flux de produit dans un évaporateur à couche mince, à film tombant ou éclair, à extraire comme flux de fond dans cet évaporateur un flux contenant principalement de l'acétate de vitamine E et b) à conduire le flux de vapeur issu de l'étape a) à une condensation partielle en au moins deux étapes. Selon l'invention, un ou plusieurs échangeurs de chaleur sont intégrés directement dans la calandre de l'évaporateur à film tombant utilisé pour séparer des mélanges de substances.
Kinner Frank
Laas Harald
Rumpf Bernd
von Erden Jens
Basf Aktiengesellschaft
Robic
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