Akzo Nobel N.v.

Nouryon Chemicals International B.v.

Other

Akzo Nobel Chemicals International B.v.

Otv Sa

Veolia Water Solutions & Technologies Support

Elwin Schomaker

Auke Gerardus Talma

Martin Heus

Johannes Bos

Roy Gérard Doppen

Paulus Johannes Cornelis Van Haeren

Erik Leonard Middelhoek

Marco Ypma

Robin Winters

Abele Broer Van Der Meer

Cornelis Elizabeth Johannus Van Lare

Cornelis Johannes Govardus Van Strien

Siebe Cornelis De Vos

Rudolf Anthonius Maria Venderbosch

Hubertus Johannes Jongen

Paul Verwer

Marianne Frederika Reedijk

Albertus Jacobus Maria Bouwman

Stijn Oudenhoven

Raymond Jean Cécile Vaessen

Johanna Henriëtte Zijtveld-Van Der Wiel

Richard Hendrikus Gerrit Brinkhuis

Johanne Josef Pragt

Frederik Albert Buijtenhuijs

Roy Doppen

Stijn Richard Gerard Oudenhoven

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 present invention pertains to a process for preparing a modified inorganic oxygen-containing particulate material comprising the steps of: a) preparing a mixture of an aqueous suspension of inorganic oxygen-containing particulate material and an alkoxylated alcohol according to the formula (I) wherein Ris a C-Calkyl, C-Ccycloalkyl or phenyl, Ris hydrogen or methyl, and n is an integer from 1 to 5; b) optionally adding a first resin and/or a first resin precursor; c) adding one or more coupling agents to the mixture; d) optionally adding a second resin and/or a second resin precursor to the resulting mixture; and wherein optionally water is removed at least partially from the mixture before or during step b), c) or d), or after step d); and optionally converting the first resin precursor into the first resin before, during or after step c) and/or the second resin precursor into the second resin after step d). 

Process for modifying inorganic oxygen-containing particulate material, product obtained therefrom, and use thereof

A process is disclosed for preparing an organically modified layered double hydroxide having a distance between the individual layers of the layered double hydroxide of about 1.5 nm and comprising an organic anion as charge-balancing anion, the process comprising the steps of: (a) preparing a precursor suspension comprising a divalent metal ion source and a trivalent metal ion source; (b) solvothermally treating the precursor suspension to obtain a double layered hydroxide, wherein an organic anion is added before or during the formation of the layered double hydroxide of step (b), or following the formation of the layered double hydroxide, so as to obtain the organically modified layered double hydroxide, with the proviso that deoxycholic acid is not the sole organic anion.

Process for preparing organically modified layered double hydroxide

The invention relates to a process for preparing a layered double hydroxide comprising a charge-balancing anion, the process comprising the steps of: (a) preparing a precursor suspension or solution comprising a divalent metal ion source, a trivalent metal ion source, water, and a solvent which is miscible with water and in which at least 5 g/l of a charge-balancing anion precursor can be dissolved; (b) treating the precursor suspension or solution to obtain the layered double hydroxide, wherein the charge-balancing anion precursor is added to the suspension or solution before, during or after step (b), and wherein, if the charge-balancing anion is an organic anion, less than 50 wt % of the charge-balancing anion precursors, based on the total weight of charge-balancing anion precursors, is a salt, with the proviso that the charge-balancing anion is not carbonate. The invention further pertains to a layered double hydroxide obtainable by this process.

A process for the removal of liquid, gaseous and/or dissolved constituents from a process stream. The process stream is contacted with an adsorbent comprising a first porous material which has been incorporated into a second porous material at least 30 vol. % of the pores of the first and second porous materials of which are filled with an extraction liquid. The affinity between the adsorbent and the constituents to be removed exceeds the affinity between the constituents and the extraction liquid.

Use of an adsorbent for the removal of liquid, gaseous and/or dissolved constituents from a process stream

The invention pertains to the use of a granulate for the removal of liquid, gaseous and/or dissolved organic constituents from a process stream, said granulate consisting of dimensionally stable, porous synthetic particles with an extracting agent having a boiling point higher than 350&#xb0; C. at 1 bar immobilized therein, characterized in that the granulate is obtainable by suspension polymerization of a monovinyl compound in the presence of a polyvinyl compound, with at least 50% wt. % of the monomer units having an aromatic structure and with the solvent for the monomers acting both as a non-solvent for the copolymer and as an extracting agent.

Use of a granulate for the removal of liquid, gaseous and/or dissolved constituents from a process stream

A method for the extraction of hydrophobic constituents, such as benzene, toluene, xylene and/or chlorinated hydrocarbons, from an aqueous solution, involving the steps of contacting said solution with a porous, preferably dimensionally stable granular or powdery material, of which the pores have a size of from 0.1 to 50 &mgr;m and contain a hydrophobic substance with affinity for the hydrophobic constituents to be extracted, which granular or powdery material has a particle size of from 0.1 to 10 mm, and is wetted more readily by the hydrophobic substance immobilized in the pores than by the aqueous solution to be treated, and regenerating the product of step a), essentially without the granular or powdery material being freed from the hydrophobic substance, by removal of the hydrophobic constituents.

Material for extracting hydrophobic components dissolved in water

Porous, preferably dimensionally stable material and a method for using for the removal of gaseous impurities from a gas mixture, such as H S, COS, CH , and SO , into the pores of which there is incorporated a secondary amine which chemically bonds with the constituents to be removed, with the material including a hydrophobic polymer with pores having an average diameter in the range of from 0.1 to 50 &mgr;m and a secondary amine having hydrophobic properties which optionally is incorporated into a hydrophobic liquid is disclosed. Favorable results have been attained using polypropylene as the hydrophobic polymer and ditridecyl amine as the secondary amine, with a tertiary amine, such as C to C -alkyl diethanol amine, being part of the hydrophobic liquid.

Material for the removal of gaseous impurities from a gas mixture

A method for the use of a porous, preferably dimensionally stable, particulate material in a packed filter bed for separating a disperse liquid phase from a gas and/or separating a disperse liquid phase from a liquid, with the average size of the particles being in the range of from 0.1 to 10 mm and the internal surface area of the material being such that, after it has been filled with the disperse liquid phase to be separated and placed, as a packed bed, at a distance of from R to r from the center in a centrifuge rotating at an angular velocity w, for which it holds that

Use of a porous, particulate material in a packed filter bed for

It is proposed to use a synthetic granulate or powder with a particle size of 0.1 to 10 mm as packing material for the removal of liquid, gaseous and/or dissolved constituents from a process stream, which packing material is made up of a porous, preferably dimensionally stable polymer having an overall porosity of 50 to 95% by volume, which when used as an extracting medium has pores of a diameter of 0.01 to 50 .mu.m, with an extracting liquid immobilised therein, or when used as a coalescence medium has a cellular body/window structure with the diameter of more than 50% by volume of the bodies being in the range of 100 to 700 .mu.m, which materials can be obtained by dissolving a polymer in one or more liquid and miscible compounds at a temperature above the upper critical phase separation temperature Tc, followed by a lowering of the temperature and mechanical diminution of the polymer filled with the liquid compounds, optionally followed by removal of the liquid therefrom and, optionally, refilling of at least 10% of the pore volume with an extracting liquid, characterised in that the polymer solution incorporates 5 to 60% by volume of filler, calculated on the overall solids content. The granulate or powder preferably is subjected to an aftertreatment by being coated with a powder or fibrous material having a softening temperature or melting temperature higher than that of the material to be coated.

Growing community of inventors

Arnhem, Netherlands

Elwin Schomaker