| abstract |
The invention is carried out by distillation of the crude product 1,6-hexanediol (HDO), 1,5-pentanediol (PDO) or caprolactone (CLO) obtained by the process according to German patent application DE-A 196 17 954. A method for obtaining the corresponding pure product. The distillation process is carried out in which the dividing wall T is arranged in the column longitudinal direction so that the feed parts 2, 4 consisting of the upper cavity column compartment 1, the lower cavity column compartment 6, the reinforcement part 2 and the driving part 4, It proceeds in a split column (TK) formed of strips (3, 5) consisting of an outlet (3) and a reinforcement (5). The corresponding crude product HDO, PDO or CLO is fed to the central compartment of feeds (2, 4), the high boiling fraction (C) is removed from the column base, the low boiling fraction (A) is removed through the column head, and The boiling point fraction (B) is removed from the central section of the removal sections 3, 5. The process of the invention can also be carried out in a heat coupled column. |