Akzo Nobel N.v.

Akzo Nobel Chemicals International B.v.

Nouryon Chemicals International B.v.

Akzo Novel Nv

Martin Heus

Antoon Jacob Berend Ten Kate

Eike Nicolas Kantzer

Rolf Krister Edvinsson

Ina Ehlers

Elwin Schomaker

Tjerk Oedse Boonstra

Roy Gérard Doppen

Paulus Johannes Cornelis Van Haeren

Hans Lammers

Cornelis Elizabeth Johannus Van Lare

Marco Ypma

Axel Carstens

Christer L Hakanson

Jim Lepage

Adrianus Maria Reichwein

Hubertus Johannes Jongen

Marcellinus Alexander Van Doorn

Paul Verwer

Arie Volmer

Stijn Oudenhoven

Stijn Richard Gerard Oudenhoven

Johannes Wilhelmus Driessen

Wouter Jan Veenis

Alexey Borisovich Zaitsev

Roy Doppen

Albertus Jacobus Maria Bouwman

Raymond Jean Cécile Vaessen

Michiel Jozef Thomas Raaijmakers

Van Paulus Johannes Cornelis Haeren

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 alanine N-acetic acid precursors of formula (i) COOM-CH(CH3)&#x2014;NH&#x2014;(CH2CN), wherein M is hydrogen (alanine N-monoacetonitrile), or (ii) COOM-CH(CH3)&#x2014;N&#x2014;(CH2CN)2, wherein 0 to 50% of all M is sodium or potassium and 50 to 100% of all M is hydrogen (alanine N,N-diacetonitrile and its partial sodium or potassium salts) comprising L-alanine to D-alanine in a range of from 75:25 to 50:50 (L:D), or (iii) COOM-CH(CH3)&#x2014;N&#x2014;(CH2CONH2)2, wherein M is hydrogen (alanine N,N-diacetamide), in the form of crystals, and relates to a process to prepare these precursors and their use, especially to give MGMA or MGDA.

Crystals of alanine N-acetic acid precursors, process to prepare them and their use

The invention relates to glutamic acid N,N-diacetic acid (GLDA) of the formula GLDA-YH, wherein m is less than 0.5, n+m=4, Y is a monovalent cation that is not a proton, in the form of crystals, a process to make these crystals, and their uses, in particular in detergent compositions.

Crystalline particles of glutamic acid N,N-diacetic acid

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.

Process to crystallize chelating agents

The invention relates to a salt of glutamic acid-N,N-diacetic acid (GLDA) of the formula GLDA-YH, wherein m is equal to or more than 0.5 and lower than or equal to 2.5, n+m=4, and wherein Y is a monovalent cation that is not a proton, comprising L-GLDA-YHto D-GLDA-YHin a range between 100:0 and 50:50 (L:D), characterized in that the salt is crystalline, a process to make such crystalline salt, and to uses of such salt, such as, in particular, in detergent compositions.

Crystalline particles of salts of glutamic acid N,N-diacetic acid

The present invention relates to new salts, complexes, crystals, solutions, dispersions, and slurries of threonine-N,N-diacetic acid or derivatives thereof, to formulations containing those, to processes to prepare those, and to the use thereof.

Salts, crystals, complexes, and derivatives of threonine diacetic acid, a process to prepare threonine diacetic acid, and the use thereof

The present invention relates to a process comprising the reaction of a cyanide with an amino acid and an aldehyde, characterized in that the cyanide is a cyanide salt, the amino acid is aspartic acid and/or glutamic acid in the acidic form, and the process is performed under acidic pH by the addition of between 0 and 1 equivalent of an acid based on the amount of aspartic or glutamic acid.

Process to prepare a chelating agent or precursor thereof using a cyanide salt

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 relates to a process for the production of an amino acid having at least one secondary or tertiary amino group and three or more carboxyl groups or its salt with less than an equivalent of alkaline metal based on the number of carboxyl groups, said process comprising reducing alkali metal ions from an aqueous solution of an alkali metal salt of an amino acid having at least one secondary or tertiary amino group and three or more carboxyl groups and acidifying the amino carboxylate starting material by first performing a chemical acidification step using an organic or inorganic acid to get a compound in which at least one of the groups is protonated, and in a subsequent step further acidifying the amino carboxylate starting material and reducing alkali metal ions from an aqueous solution of the partially acidified alkali metal salt of the amino acid having at least one secondary or tertiary amino group and three or more carboxyl groups by electrodialysis, wherein the electrodialysis is performed using a hydrogen ion permselective membrane on the anode side and a cation-permeable membrane on the cathode side.

Process to prepare amino acid-N, N-diacetic acid compounds

The present invention relates to an alkalimetal salt of glutamic acid-N,N-diacetic acid (GLDA) of the formula NaKHGLDA, wherein x is equal to or more than 2 and lower than 4 and y is more than 0 and equal to or lower than 2, x+y is 3.5-4, and x+y+z=4, to processes to prepare such salt and the use thereof.

Alkali metal salt of glutamic acid N,N-diacetic acid, a process to prepare such salt, and the use thereof

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.

Aqueous solution of a sodium salt of HEDTA

Chelating agents and their manganic chelates

A process for the preparation of alkylene diamine triacetic acid (derivatives) which comprises the conversion of an alkylene diamine (derivative) to a metal salt of an alkylene diamine triacetic acid (derivative). The reaction is carried out in the presence of a polyvalent metal ion M and the entire reaction is carried out under hydrolyzing conditions if any of the reactants contain or form nitrile or amide groups.

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Arnhem, Netherlands

Martin Heus