A process for the preparation of Racemic citalopram in the form of a Free Base or an Acid Addition Salt thereof, and / or for the preparation of R - or S - citalopram in the form of a Free Base or an Acid Addition Salt thereof, through the separation of a m Ezcla of R - and S - containing one of citalopram enantiomers in a concentration higher than 50%.In a fraction of a fraction of Racemic citalopram and citalopram or S - R - Where: (i) citalopram citalopram is precipitated from the Solvent, in the form of a Free Base or a Salt thereof obtained by adding an Acid precipitated material； (ii) Formed is separated from the mother Liquor； ii) if the precipitated material is Crystalline,Optionally, one or more times is recrystallized by way of Forming Racemic citalopram, after which is optionally converted into a Salt thereof obtained by the addition of an Acid； b) if the material is not Crystalline Precipitate, optionally repeating the steps (i) and (ii) Sta to obtain a material precipitated CrystallineAnd the Crystalline precipitate recrystallised material is optionally one or more times by way of Forming Racemic citalopram, after which is optionally converted into a Salt thereof by the addition of an Acid； (iii) optionally the mother Liquor is subjected to further purification Onal,The S - and R - citalopram or citalopram is isolated from the mother Liquor and optionally become a Salt thereof by the addition of an Acid, where the mixture of R - and S - citalopram with more than 50% of the s-enantiomer is prepared from a mixture of R - and S - 4 - [4 - (dimethylamino) - 1 - (4 - fluorofeni L) - 1 - hidroxibutil] - 3 - (hydroxymethyl) - Benzonitrile with more than 50% of the S - enantiomer by TrainingN a labile Ester Group, after which closes the ring in a basic environment； or the mixture of R - and S - citalopram with more than 50% of the R enantiomer is prepared from a mixture of R - and S - 4 - [4 - (dimethylamino) - 1 - (4-fluorophenyl) - 1 - hidroxibutil] - 3 - (h
