Fremgangsmate ved rensing av et aminalkohol

The present invention relates to a process for the preparation of 2-amino-1,3-propanediol, having a content of organic impurities lower than 0.1% and inorganic impurities lower than 0.05%, comprising the following steps: a) formation of a 2-amino-1,3-propanediol salt with an acid; b) crystallization of the salt resulting from step a) from an aqueous or a hydro-organic mixture with a solvent selected from the group consisting of an alcohol of general formula R-OH, wherein R is a C1-C6 straight or branched alkyl chain, and a mono(C1-C3)alkylether of the (C3-C7)alkylcellosolve group; c) elution of the free base by using ion exchangers to give an aqueous solution of said base; d) precipitation or crystallization of the solid 2-amino-1,3-propanediol from a solvent as defined in step b).