Nouryon Chemicals International B.v.

Roy Doppen

Elwin Schomaker

Martin Heus

Marco Ypma

Paulus Johannes Cornelis Van Haeren

Stijn Oudenhoven

Raymond Jean Cécile Vaessen

A process for the preparation of a solid composition of an amino acid diacetic acid compound wherein the amino acid diacetic acid compound is methyl glycine-N,N-diacetic acid or a salt thereof, or glutamic N,N-diacetic acid or a derivative thereof, as well as the product obtained by such process are disclosed. The process includes feeding a saturated or oversaturated aqueous composition of the amino acid diacetic acid compound in an aqueous solvent to a drum dryer, wherein the aqueous composition is fed to the drum surface with a layer thickness of from about 0.1 to about 10 mm, the drum has a surface temperature of from about 80 to about 180&#xb0; C., and the drum operates at a tangential speed of from about 0.1 to about 100 m/min. The method further includes removing the mass from the drum before a full revolution of the drum.

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Deventer, Netherlands

Roy Doppen