Propylene oxide purification and recovery

Details Propylene oxide purification and recovery Propylene oxide purification and recovery

C - Chemistry, Metallurgy

07

D

C07D 301/12 (2006.01) C07D 301/04 (2006.01) C07D 301/32 (2006.01)

Patent

CA 2634179

In accordance with the invention, propylene oxide is formed by reaction of propylene and hydrogen peroxide or by reaction of propylene, oxygen and hydrogen in methanol solvent, methanol and methyl formate are separated from propylene oxide by extractive distillation wherein the aqueous bottoms from methanol recovery distillation is used as extractive distillation solvent after first having been neutralized.

L'invention concerne la formation de l'oxyde de propylène par réaction de propylène et de peroxyde d'hydrogène, ou par réaction de propylène, d'oxygène et d'hydrogène dans du solvant méthanol. Le méthanol et le formiate de méthyle sont séparés de l'oxyde de propylène par distillation extractive au cours de laquelle les fractions de queue aqueuses issues de la distillation de récupération du méthanol sont utilisées en tant que solvant de distillation extractive, après avoir été préalablement neutralisées.

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