Process for the distillative separation of pure (meth) acrylic acid from mixtures which are essentially free of components whose boiling point is lower than that of the (meth) acrylic acid

摘要

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.