Method of separation of acrylic acid from the solutions in the phosphate of sorting butyl n - -

摘要

P the invention relates to the separation of acrylic acid from the solutions in the phosphate of sorting - n -. & / p & & p & the method consists of: a. to form a vapor phase comprising the acrylic acid and a part of the sorting - n - butyl by heating the starting solution, under conditions which avoid the degradation of the sorting - n - butyl, b and then, after partial or complete condensation of the vapor phase, to carry out, on the basis of this phase, a distillation of acrylic acid by maintaining in the bottom of the column, an acrylic acid content sufficient to avoid the degradation of the sorting - n - butyl in the operating conditions, c, optionally to be recycled to the supply of the stage a, the distillation residue of the stage b / p