VERFAHREN ZUR HERSTELLUNG VON PERESSIGSAEURE.

摘要

Prepn. of peracetic acid in organic soln., from H2O2 and acetic acid, in presence of H2SO4, and transfer to an organic solvent, is carried out in a distn. appts. Before conversion, the sump is charged with H2O2 and acetic acid in molar ratio 1-2:1, with H2O2 as a 30-35 wt.% aq. soln., and the concn. of H2SO4 is adjusted at 20-30 wt.%. These conditions are held stationary in the sump by feeding aq. H2O2 and acetic acid. Reaction is at 55-70 deg.C and 100-200 mbar. A vapour phase contg. peracetic acid, acetic acid and water is withdrawn from the appts. and fed into an absorption column in countercurrent to a 3-30C organic phosphate, which takes up the peracetic acid and acetic acid, giving a soln. of peracetic acid and acetic acid in the phosphate, whilst non-absorbed water leaves the system at the head.