METHOD FOR PRODUCING AMINO-POLYCARBOXYLATES FROM AMINO ACIDS

摘要

The invention relates to a method for producing amino-polycarboxylates from an amino acid which, in a first method step, is reacted with ethylene oxide to form an intermediate product mixture comprising the corresponding dialkanolamine, and the intermediate product mixture is subsequently catalytically reacted to form the corresponding amino polycarboxylate using a base in a second method step, wherein the method is characterized in that the amino acid is caused to partially neutralize, having 0.70 to 0.99 equivalent base per acid group, before the reaction with ethylene oxide in the first method step or in that, in the first method step, an amino acid, which is already partially neutralized, having 0.70 to 0.99 equivalent base per acid group, is used.