C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 45/78 (2006.01) C07C 45/35 (2006.01) C07C 45/80 (2006.01) C07C 45/82 (2006.01) C07C 47/22 (2006.01) C07C 319/18 (2006.01) C07C 323/22 (2006.01)
Patent
CA 2474416
The invention relates to a continuous method for the purification of acrolein, wherein: an aqueous acrolein solution is supplied, devoid of gas which is difficult to condense, in a distillation column fitted with at least one boiler at the base thereof and with at least one condenser at the head thereof; a mixture which essentially contains water is drawn off at the base of the distillation column; a mixture which essentially contains acrolein and water is drawn off at the head of the distillation column; the mixture drawn off from the head of the distillation column is cooled in the condenser to a temperature enabling an aqueous condensate to be obtained, in addition to a substantial amount of a gaseous mixture which is rich in acrolein; the purified acrolein is isolated in the gaseous mixture which is rich in acrolein.
La pr~sente invention a donc pour objet un proc~d~ continu de purification de l'acrol~ine dans lequel : - on alimente une solution aqueuse d'acrol~ine d~pourvue de gaz difficilement condensable, dans une colonne de distillation ~quip~e ~ sa base d'au moins un bouilleur et sa tÚte d'au moins un condenseur, - on soutire ~ la base de la colonne de distillation un m~lange comprenant essentiellement de l'eau, - on soutire en tÚte de la colonne de distillation un m~lange comprenant essentiellement de l'acrol~ine et de l'eau, - on refroidi, dans le condenseur, le m~lange soutir~ en tÚte de colonne de distillation, ~ temp~rature permettant d'obtenir d'une part, un condens~t aqueux, et d'autre part, une quantit~ substantielle d'un m~lange gazeux riche en acrol~ine, et - on isole de l'acrol~ine purifi~e dans le m~lange gazeux riche en acrol~ine.
Garrait Michel
Gros Georges
Rey Patrick
Adisseo France S.a.s.
Adisseo Ireland Ltd
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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