Process for the purification of vanillin or a vanillin derivative obtained by a biotechnological process

Abstract

The present invention relates to a process for purifying a fermentation must (M), obtained via a biotechnological process, comprising biomass and vanillin or derivatives thereof, said purification process comprising: (a) a step of separating the biomass of a fermentation must (M) from an aqueous stream (A1) comprising vanillin or derivatives thereof, (b) at least one step of liquid/liquid extraction of the aqueous stream (A1) comprising vanillin or derivatives thereof, said extraction step allowing the separation of an aqueous stream (A2) and an organic stream (O1) comprising vanillin or derivatives thereof, (c) at least one step of concentrating the organic stream (O1) to obtain an organic stream (O2) in which compounds with a boiling point lower than that of vanillin or derivatives thereof are separated from said organic stream (O1), (d) at least one step in which compounds with a boiling point higher than that of vanillin or derivatives thereof are separated from an organic stream (O2) comprising vanillin or derivatives thereof to obtain a stream (O3), (e) at least one step of crystallizing the vanillin or derivatives thereof contained in the stream (O3).

Dependencies are inferred from the claim text.