C CHEMISTRY; METALLURGY
C07 ORGANIC CHEMISTRY
C07C ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C29/00 Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
C07C29/74 Separation; Purification; Use of additives, e.g. for stabilisation
C07C29/76 by physical treatment
C07C29/80 by distillation