Alkylene oxide purification columns

Details Alkylene oxide purification columns Alkylene oxide purification columns

B - Operations, Transporting

01

D

B01D 3/14 (2006.01) B01D 3/20 (2006.01) B01D 3/22 (2006.01) B01D 3/42 (2006.01) C07D 301/32 (2006.01)

Patent

CA 2731945

Processes and systems for purifying ethylene oxide, including introducing a feed stream (106) including ethylene oxide to a heat exchanger (102) to heat the feed stream, feeding the heated feed stream to a distillation apparatus (104) base below a first stage, removing from the distillation apparatus an impurity fraction as a top exit stream (116) from the distillation apparatus (104) located at a top take-off on the distillation apparatus (104), removing from the distillation apparatus (104) an ethylene oxide stream (112) of 99.7 weight percent purity, based on the total weight of the ethylene oxide stream, from the distillation apparatus, and removing from the distillation apparatus (104) an aldehyde enriched fraction as a bottom stream (122) from the distillation apparatus (104), where the aldehyde enriched fraction is fed directly to a glycol reactor (123).

Linvention concerne des procédés et des systèmes de purification doxyde dalkylène, lesdits procédés comprenant les étapes consistant à introduire un flux dalimentation (106) incluant de loxyde déthylène dans un échangeur de chaleur (102) afin de chauffer le flux dalimentation, alimenter le flux dalimentation chauffé à la base dun appareil de distillation (104) sous un premier étage, éliminer de lappareil de distillation une fraction dimpureté sous forme dun flux de sortie (116) localisé au point de tirage supérieur de lappareil de distillation (104), éliminer de lappareil de distillation (104) un flux doxyde déthylène (112) dune pureté de 99,7 % en poids, calculé sur le poids total du flux doxyde déthylène, et éliminer de lappareil de distillation (104) une fraction enrichie en aldéhyde sous forme dun flux de sortie inférieur (122) de lappareil de distillation (104), ladite fraction enrichie en aldéhyde alimentant directement un réacteur à glycol (123).

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