PROCESS TO PREPARE PHENOLIC ETHYLENEDIAMINE DIACETIC ACID COMPOUNDS
The present invention relates to a process to prepare N,N′-di(2-hydroxybenzyl) ethylenediamine-N,N′-diacetic acid and salts thereof comprising a reaction between formaldehyde, ethylenediamine diacetic acid or a salt thereof and phenol at a pH of between 3 and 7 and a temperature below 60° C. wherein...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Format: | Patent |
| Sprache: | eng ; pol |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | The present invention relates to a process to prepare N,N′-di(2-hydroxybenzyl) ethylenediamine-N,N′-diacetic acid and salts thereof comprising a reaction between formaldehyde, ethylenediamine diacetic acid or a salt thereof and phenol at a pH of between 3 and 7 and a temperature below 60° C. wherein the reaction mixture contains 0.2 to 1.1 molar equivalents of alkali metalions on the molar amount of EDDA. |
|---|