Abstract: Process for making solid methylglycine diacetate (MGDA) alkali metal salt (A), said process comprising the steps of (a) providing a 40 to 60% by weight aqueous solution of said salt (A) having a temperature in the range of from 50 to 90° C., (b) crystallizing salt (A), (c) removing said crystalline salt (A) from the mother liquor by filtration, and (d) subjecting the water containing filter cake from step (c) to an extrusion step.

Abstract: The present invention is directed towards a process for making a powder or granule containing (A) at least one alkali metal salt of citric acid, and at least one additive selected from (B) at least one (co)polymer containing carboxylic acid groups, partially neutralized with alkali, in a weight ratio of (A):(B) of from 5:1 up to 100:1, wherein said powder or granule contains at least 75% by weight of citrate (A), said process comprising the steps of (a) mixing the at least one alkali metal salt of citric acid (A) and the at least one (co)polymer (B) in the presence of water, (b) removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of at least 125° C.

Abstract: Process for making a granule containing (A) at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA) and of iminodisuccinic acid (IDS), and, optionally, (B) at least one homo- or copolymer of (meth)acrylic acid, partially or fully neutralized with alkali, said process comprising the steps of (a) providing an aqueous solution or slurry containing chelating agent (A) and, if applicable, (co)polymer (B), (b) removing most of said water by spray granulation in a fluidized bed, (c) treating the resultant granule in a vessel of which at least one part rotates around a horizontal axis and wherein said vessel is selected from paddle mixers, free-fall mixers and plough share mixers.

Abstract: The present invention is directed towards a process for manufacturing a complexing agent, said process comprising the steps of (a) Providing a nitrile according to general formula (I a) or (I b) With M being selected from alkali metal and hydrogen and combinations thereof, (b) Saponification with a total alkali amount of 2.5 to 2.9 mol of alkali metal hydroxide per mole of nitrile according to general formula (I a) or (I b), respectively, and a pH value in the range of from 9.5 to 11.5 at the end of step (b), (c) Adding an amount of alkali metal hydroxide so that the total alkali content is 2.9 to 3.15 moles per mole nitrile according to general formula (I a) or (I b), respectively, and (d) Allowing further conversion.

Abstract: Process making a powder or granule containing (A) at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA) and of glutamic acid diacetate (GLDA) and of iminodisuccinic acid (IDS), (B) at least one alkali metal silicate, and (C) at least one (co)polymer containing carboxylic acid group, partially neutralized with alkali, in a weight ratio of (A):[(B)+(C)] of from 20:1 up to 100:1, wherein said powder or granule contains at least 75% by weight of chelating agent (A), said process comprising the steps of (a) mixing the at least one chelating agent (A) and the at least one alkali metal silicate (B) and the at least one (co)polymer (C) in the presence of water, (b) removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of at least 125° C.

Abstract: Process for making solid methylglycine diacetate (MGDA) alkali metal salt (a), said process comprising the steps of (A) providing a 35 to 60% by weight aqueous solution of said MGDA salt having a temperature in the range of from 50 to 90° C., (B) adding 0.01 to 2% by weight of a particulate solid with a pore volume in the range of from 0.25 to 0.75 cm3/g, determined by nitrogen adsorption in accordance with 66134:1998-02 (b), the percentage referring to the content of (a), (C) crystallizing (a), (D) removing said crystalline (a) from the mother liquor.

Abstract: Process for making a powder or granule containing (A) at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA) and of glutamic acid diacetate (GLDA) and of iminodisuccinic acid (IDS), (B) at least one alkali metal salt of a C10-C20 fatty acid, in a weight ratio of (A):(B) of from 40:1 up to 1,000:1, wherein said powder or granule contains at least 75% by weight of chelating agent (A), said process comprising the steps of (c) mixing the at least one chelating agent (A) and the at least one alkali metal salt of fatty acid (B) in the presence of water, (d) removing most of said water by spray-drying or by spray granulation using a gas with an inlet temperature of at least 125° C.

Abstract: A process for making solid methylglycine diacetate (MGDA) alkali metal salt (a) includes: (A) providing a 40 to 60% by weight aqueous solution of the MGDA salt having a temperature in the range of from 50 to 90° C., (B) adding solid salt (a), (C) heating the resultant slurry until the salt (a) added in step (B) has dissolved at least partially, (D)allowing salt (a) to crystallize, and (E) removing crystalline salt (a) from the mother liquor.

Abstract: Process for making a powder or granule containing at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA) and glutamic acid diacetate (GLDA) and iminodisuccinic acid (IDS), said process comprising the steps of (a) introducing an aqueous solution or aqueous slurry of the respective chelating agent (A) into a spray-dryer or spray-granulator, and removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of 125 to 250° C.

Abstract: Process for manufacturing granules of at least one alkali metal salt of aminopolycarboxylic acid (A), comprising the steps of (a) providing an aqueous slurry of alkali metal salt of aminopolycarboxylic acid (A), (b) maintaining said aqueous slurry at a temperature in the range of from 50 to 90° C. over a period of time in the range of from 2 to 180 hours, (c) spray granulating said slurry with a gas inlet temperature of at least 150° C.

Abstract: The present invention is directed towards a process for manufacturing a complexing agent, said process comprising the steps of (a) Providing a nitrile according to general formula (I a) or (I b) (formula I a, I b) With M being selected from alkali metal and hydrogen and combinations thereof, (b) Saponification with a total alkali amount of 2.5 to 2.9 mol of alkali metal hydroxide per mole of nitrile according to general formula (I a) or (I b), respectively, and a pH value in the range of from 9.5 to 11.5 at the end of step (b), (c) Adding an amount of alkali metal hydroxide so that the total alkali content is 2.9 to 3.1 moles per mole nitrile according to general formula (I a) or (I b), respectively, and (d) Allowing further conversion.

Abstract: Container comprising a single unit dose of a detergent composition containing at least one complexing agent (A) dissolved in an aqueous medium, said complexing agent (A) being a mixture of the L- and D-enantiomers of glutamic acid diacetic acid (GLDA) or its respective mono-, di-, tri- or tetraalkali metal salts or its mono-, di-, tri- or tetraammonium salts, said mixture containing predominantly the respective L-isomer with an enantiomeric excess (ee) in the range of from 5 to 90%, wherein said container is made from a polymer.

Abstract: Process for making a powder or granule containing at least one chelating agent selected from alkali metal salts of methyl glycine diacetic acid (MGDA) and glutamic acid diacetate (GLDA) and iminodisuccinic acid (IDS), said process comprising the steps of (a) introducing an aqueous solution or aqueous slurry of the respective chelating agent (A) into a spray-dryer or spray-granulator, and removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of 125 to 250° C.

Abstract: Mixtures comprise (A) 90 to 99.9% by weight of a mixture of L- and D-enantiomers of methyl glycine diacetic acid (MGDA) or its respective mono-, di- or trialkali metal or mono-, di- or triammonium salts, said mixture containing predominantly the respective L-enantiomer with an enantiomeric excess (ee) in the range of from 10 to 99%, and (B) in total 0.1 to 10% by weight of the diacetic acid derivative of at least one amino acid selected from valine, leucine, isoleucine, and tyrosine, as free acids or respective mono-, di- or trialkali metal or mono-, di- or triammonium salts, percentages referring to the sum from (A) and (B).

Abstract: Process for manufacturing granules of at least one alkali metal salt of aminopolycarboxylic acid (A), comprising the steps of (a) providing an aqueous slurry of alkali metal salt of aminopolycarboxylic acid (A), (b) maintaining said aqueous slurry at a temperature in the range of from 50 to 90° C. over a period of time in the range of from 2 to 180 hours, (c) spray granulating said slurry with a gas inlet temperature of at least 150° C.

Abstract: The present invention is directed towards mixtures comprising (A) 90 to 99.9% by weight of a mixture of L- and D-enantiomers of methyl glycine diacetic acid (MGDA) or its respective mono-, di- or trialkali metal or mono-, di- or triammonium salts, said mixture containing predominantly the respective L-enantiomer with an enantiomeric excess (ee) in the range of from 10 to 99%, and (B) in total 0.1 to 10% by weight of the diacetic acid derivative of at least one amino acid selected from valine, leucine, isoleucine, and tyrosine, as free acids or respective mono-, di- or trialkali metal or mono-, di- or triammonium salts, percentages referring to the sum from (A) and (B).

Abstract: Container comprising a single unit dose of a detergent composition containing at least one complexing agent (A) dissolved in an aqueous medium, said complexing agent (A) being a mixture of the L- and D-enantiomers of glutamic acid diacetic acid (GLDA) or its respective mono-, di-, tri- or tetraalkali metal salts or its mono-, di-, tri- or tetraammonium salts, said mixture containing predominantly the respective L-isomer with an enantiomeric excess (ee) in the range of from 5 to 90%, wherein said container is made from a polymer.

Abstract: The present invention relates to a process for the preparation of low-dust granules, which comprises applying an aqueous solution or suspension of a hydrate-forming compound to a particulate starting material, the particulate starting material being at a temperature below the transition temperature of the hydrate-forming compound during the application of the aqueous solution or suspension and the aqueous solution being at a temperature above the transition temperature, effecting granulation subsequently or simultaneously and, if desired, drying the granules obtained.

Abstract: This invention is directed to a process for preparing a compound containing a persalt activators and salts thereof which are derived from imidocarboxylic acids and sulfimidocarboxylic acids of the formula I: ##STR1## in which A is a group of the formula ##STR2## n is the number 0, 1 or 2, R.sup.1 is hydrogen, chlorine, bromine, C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, aryl, or alkylaryl,R.sup.2 is hydrogen, chlorine, bromine, --SO.sub.3 M, --CO.sub.2 M or --OSO.sub.3 M, X is C.sub.1 -C.sub.19 -alkylene or arylene,B is a group of the formula C.dbd.O or SO.sub.2,L is a leaving group.

Abstract: This invention is directed to a process for bleaching textile objects and bleaching agent containing a persalt activators and salts thereof which are derived from imidocarboxylic acids and sulfimidocarboxylic acids of the formula I: ##STR1## in which A is a group of the formula ##STR2## n is the number 0, 1 or 2, R.sup.1 is hydrogen, chlorine, bromine, C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, aryl, or alkylaryl,R.sup.2 is hydrogen, chlorine, bromine, --SO.sub.3 M, --CO.sub.2 M or --OSO.sub.3 M,X is C.sub.1 -C.sub.9 -alkylene or arylene,B is a group of the formula C.dbd.O or SO.sub.2,L is a leaving group.