Process for separating by distillation pure (meth)acrylic...

Details Process for separating by distillation pure (meth)acrylic... Process for separating by distillation pure (meth)acrylic...

C - Chemistry, Metallurgy

07

C

C07C 57/04 (2006.01) C07C 51/44 (2006.01)

Patent

CA 2263949

A process is disclosed for separating by distillation pure (meth)acrylic acid from mixtures which contain (meth)acrylic acid, as well as dimers and oligomers of (meth)acrylic acid, and which are substantially free from aldehydes and components with a lower boiling point than (meth)acrylic acid. A distiller used for that purpose has a thin film evaporator, a condenser and a connection with a deflector between the thin film evaporator and the condenser.

L'invention concerne un procédé pour la séparation par distillation d'acide (méth)acrylique pur contenu dans des mélanges qui contiennent de l'acide (méth)acrylique ainsi que des di- et oligomères de l'acide (méth)acrylique et sont pratiquement dépourvus d'aldéhydes et de constituants à point d'ébullition inférieur à l'acide (méth)acrylique, à l'aide d'un dispositif de distillation comportant un vaporisateur à couche mince, un condenseur et une liaison intermédiaire présentant un dispositif déflecteur.

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