Process for the preparation of N,N-dialkylarylamines

摘要

Process for the preparation of N,N-dialkylarylamines (I) by reacting arylamines (II) with alcohols (IIIa) or dialkyl ethers (IIIb) in the presence of an oxyacid of phosphorus or of an ammonium salt thereof as catalyst, characterised in that the oxyacid of phosphorus is reacted with an arylamine (IV) before the beginning of the reaction. The invention furthermore relates to the regeneration of the catalyst, by interrupting the reaction occasionally and treating the catalyst phase with steam or water at 100 to 300 DEG C.