Akzo Nobel N.v.

Jim Lepage

Martin Heus

Tjerk Oedse Boonstra

Hans Lammers

Axel Carstens

The present invention relates to glutamic acid N,N-diacetic amide, potassium or sodium glutamate N,N-diacetic amide, glutamic acid N-acetic amide N-acetonitrile, potassium or sodium glutamate N-acetic amide N-acetonitrile, to processes to prepare such compounds and the use thereof.

Glutamic acid N,N-diacetic amide, glutamic acid N-acetic amide N-acetonitrile, alkali metal salts thereof, process to prepare them and their use

The invention pertains to an aqueous solution of a sodium salt xNayHof the chelating compound of formula I: wherein x=2.1&#x2013;2.7, y=0.9&#x2013;0.3, and x+y=3. The invention further pertains to a container comprising at least 0.5 kg of said aqueous solution and to a method of preparing an aqueous solution comprising at least 45 wt % of the sodium salt xNayHof the chelating compound of formula I from Na-HEDTA, comprising the steps of electrodialysing an aqueous solution containing less than 42 wt % of Na-HEDTA using a bipolar membrane, thereby converting the trisodium salt solution to the solution of the sodium salt of formula I with x=2.1&#x2013;2.7, y=0.9&#x2013;0.3, and x+y=3.

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Chicago, IL, United States of America

Jim Lepage