The distillation apparatus must meet the following specifications:
- the number of joints must be no more than the strict minimum needed to ensure the system is leak-tight,
- inclusion of a device designed to prevent priming (entrainment of the boiling liquid by the vapour) and to regularise the distillation rate of alcohol-rich vapours,
- rapid and complete condensation of the alcohol vapours,
- collection of the first distillation fractions in an aqueous medium.
39.01 Condensation, polycondensation and polyaddition products, whether or not modified or polymerised, and whether or not linear (for example, phenoplasts, aminoplasts, alkyds, polyallyl esters and other unsaturated polyesters, silicones)
