Preparation of phenolic ethylenediaminepolycarboxylic acids

Details Preparation of phenolic ethylenediaminepolycarboxylic acids Preparation of phenolic ethylenediaminepolycarboxylic acids

1977-04-19

1978-12-19

Thomas, Jr., James O.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5100

Patent

active

041305825

ABSTRACT:
A process for the preparation of phenolic ethylenediamine polycarboxylic acids in predominantly the ortho isomeric form which comprises reacting a phenol compound, ethylenediamine, glyoxylic acid and a base, said phenol compound functioning both as a reactant and as the sole solvent for the reaction system. The product can then be isolated or directly reacted with an iron salt to form the corresponding iron chelate.

REFERENCES:
patent: 2824128 (1958-02-01), Dexter
patent: 3825592 (1974-07-01), McCrary et al.

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