Process for obtaining acrylic acid from its solutions in tri-n-butyl phosphate

摘要

separation of acrylic acid from solutions in tri-n-butyl phosphate, consisting of:(a) to provide a vapor phase comprising acrylic acid and a part of tri-n-butyl phosphate by heating the starting solution under these conditions to avoid degradation of tri-n-butyl phosphate, (b) after total or partial condensation of the vapour phase. to carry out, on the basis of this phase.acrylic acid distillation column in the content of acrylic acid sufficient to prevent the degradation of tri-n-butyl phosphate in the operating conditions, and (c) optionally recycling the feed to the stage (a) of the distillation residue the stage (b).