USE OF HYDROXYALKYLAMINOCARBOXYLIC ACIDS AS COMPLEUSE OF HYDROXYALKYLAMINOCARBOXYLIC ACIDS AS COMPLEXING AGENTS XING AGENTS

摘要

Hydroxyalkylaminocarboxylic acids have the general formula (I), in which R1 is hydrogen, a C¿1?-C4 alkyl residue or a group having the formulas -CHR?3¿-CH(OH)-R2 or -CH¿2?)n-COOM, in which n equals 1 to 4; R?2 and R3¿ represent independently from each other hydrogen, a phenyl residue or an alkyl or alkenyl residue that may in addition bear phenoxy groups, carboxylic acid C¿1?-C4-alkyl ester groups or ester groups derived from triglycerides based on unsaturated C10-C22 fatty acids and may be interrupted by non-adjacent oxygen atoms, the sum of all C atoms from both residues R?2 and R3¿ being at least 4; A is a linear or branched C¿1?-C6 alkylene group that may in addition bear a hydroxyl group and/or a group having the formula COOM, and R?1¿ and A may form together with the N atom a 5- or 6-membered ring; and M is hydrogen, alkaline metal, ammonium or substituted ammonium. These hydroxyalkylaminocarboxylic acids are useful as complexing agents for alkaline earth and heavy metal ions.