Nouryon Chemicals International B.v.

Akzo Nobel Chemicals International B.v.

Paulus Johannes Cornelis Van Haeren

Elwin Schomaker

Martin Heus

Marco Ypma

Roy Gérard Doppen

Stijn Richard Gerard Oudenhoven

Stijn Oudenhoven

Roy Doppen

Raymond Jean Cécile Vaessen

The present invention relates to a crumbly phase composition containing on total weight of the composition The invention furthermore relates to a process to prepare the above composition and a process to prepare crystals of MGDA-Na3 by drying the above composition.

Crumbly phase composition of methylglycine N,N diacetic acid

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.

Process to prepare a solid composition of an amino acid diacetic acid

A solid composition, methods for preparing and using the composition, and a rehydrated crystal are disclosed. An exemplary solid composition contains at least about 2 wt % of methyl glycine-N,N-diacetic acid trisodium salt of crystal type III, based on the total weight of crystalline methyl glycine-N,N-diacetic acid trisodium salt compounds, wherein the crystal type III is the form of a crystal, comprising a crystalline modification characterized by the reflections enlisted below when analyzed with X-ray diffraction analysis using Cu K&#x3b1; radiation: 

Sodium methyl glycine-N,N-diacetic acid compound, process to prepare it and use thereof

The present invention relates to a process to crystallize a chelating agent containing a step of adding seeds to a saturated or supersaturated aqueous solution or dispersion of the chelating agent and a subsequent step of milling the dispersion, wherein the step of milling the dispersion is performed using equipment operating at at least 1,000 rpm, and to products obtainable by such process.

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Doetinchem, Netherlands

Paulus Johannes Cornelis Van Haeren