Study of the repartition of phthalate esters during distillation of wine for spirit production

- It is necessary to limit contaminants such as phthalates esters (PAEs)
- The behaviour of PAEs during distillation was investigated using a lab still.
- DBP and DEHP were carried over into the distillate, DINP accumulated in the stillage.
- Rectification of the secondes is effective to considerably reduce PAEs concentration.

Due to health concerns and legal matters, an investigation to limit phthalates esters (PEAs) in spirits is necessary. A lab still was used to perform pilot distillations according to the official method for brandy production in order to explore the repartition into the distilled fractions of each PAE. The process was divided in two steps: a première chauffe and a bonne chauffe. The former step included the cut into heads, heart and tails, while the latter into heads, brandy, secondes, and tails. The behaviour of each PAE during distillation was affected by its own chemical nature. Dibutyl phthalate (DBP) was entirely carried over into the distillate, while bis(2-ethylhexyl) phthalate (DEHP) only partially, and diisononyl phthalate (DINP) accumulated in the stillage. During the bonne chauffe, DBP and DEHP accumulated in the secondes more than in the brandy. A rectification step of the secondes was demonstrated to considerably reduce PAEs concentration.