Abstract:
Process for preparation of a mixture of methyl glycine diacetic acid (MGDA) or its respective mono-, di-, trialkali metal salt or its respective mono-, di- or tri-ammonium salt or mixtures thereof, and glutamic acid diacetic acid (GLDA) or its respective mono-, di-, tri-, or tetra-alkali metal or mono-, di-, tri- or tetra-ammonium salt or mixtures thereof, wherein said process com-prises the steps of: (a) dissolution in water of (a1) alanine in its L- or D-enantiomeric form or its respective monoalkali metal salt or mixtures thereof, and (a2) glutamic acid as L- or D-enantiomer or its respective mono-, or dialkali metal or mixtures thereof, wherein the molar ratio of alanine to glutamic acid is in the range of from 1:9 to 9:1, (b) converting the mixture obtained in step (a) with formaldehyde and hydrocyanic acid or alkali metal cyanide to the corresponding dinitriles, (c) saponification of the dinitriles resulting from step (b).
Abstract:
The present invention is directed towards a process for the synthesis of compounds with the general formula (II) or their respective alkali metal salts by oxidation of compounds of general formula (I) with oxygen
in the presence of a heterogeneous catalyst containing a metal of group 10 of the periodic table of the elements, wherein R1 and R2 and R3 are same or different and selected from H and C1-C6-alkyl, non-substituted or substituted with one or more moieties selected from COOH and O-R4 with R4 being selected from H and C1-C4-alkyl.
Abstract:
Process for manufacturing granules or powders comprising the steps of (a) providing an aqueous solution or slurry of (A) at least one chelating agent according to general formula (I a) [CH3—CH(COO)—N(CH2—COO)2]M3-XHX (I a) wherein M is selected from alkali metal cations and ammonium, same or different, and x is in the range of from 0.01 to 1.0 or (I b) [OOC—CH2CH2—CH(COO)—N(CH2—COO)2]M4-XHX (I b) wherein M is as defined above, and x in formula (I b) is in the range of from 0.01 to 2.0, and (B) at least one polymer selected from (B1) polyaspartates with an average molecular weight Mw in the range of from 1,000 to 20,000 g/mole, and (B2) copolymers comprising, in copolymerized form, (α) at least one ester of an ethylenically unsaturated mono- or dicarboxylic acid, and (β) at least one ethylenically unsaturated N-containing monomer, and (b) spray drying or granulating said solution or slurry.
Abstract:
Aqueous solution containing in the range of from 60.5 to 75% by weight of a mixture of trialkalimetal salts of the L- and D-enantiomers of methyl glycine diacetic acid (MGDA), said mixture containing predominantly the respective L-isomer with an enantiomeric excess (ee) in the range of from 3 to 97%, wherein said trialkali metal salts have the general formula (I) [CH3—CH(COO)—N(CH2—COO)2]K3-xNax (I) wherein x is in the range of from zero to 2.9.
Abstract:
Process for making a particulate coated chelating agent (A) wherein said process comprises the following steps:
(a) Providing a granule or powder containing an alkali metal salt of methyl glycine diacetic acid (MGDA) or glutamic acid diacetic acid (GLDA), preferably with a moisture content in the range of from 1 to 15% by weight, (b) treating said salt with a metal alkoxide or metal halide or metal amide or alkyl metal compound or with an alkoxide, amide, halide or alkyl compound of silicon, (c) treating the material obtained in step (b) with moisture or (c*) with ozone, (d) optionally, repeating the sequence of steps (b) and (c) once to 25 times.
Abstract:
The present invention is directed towards an aqueous solution comprising (i) in the range of from 45 percent by weight to 60 percent by weight based on the total weight of the solution of at least one complexing agent (A), selected from the group consisting of methylglycine diacetic acid and its respective mono-, di-, or trialkali metal and mono-, di-or triammonium salts, and glutamic acid diacetic acid, and its respective mono-, di-, tri-or tetraalkali metal and mono-, di-, tri-or tetraammonium salts, (ii) in the range of from 1 percent by weight to 30 percent by weight based on the weight of component (A) of at least one homo-or copolymer of (meth)acrylic acid (B) that is either partially or fully neutralized, and (iii) water, said aqueous solution being stable for at least one week.
Abstract:
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-isomer with an enantiomeric excess (ee) in the range of from 10 to 75%.
Abstract:
Alkoxylated alcohols and their use in formulations for hard surface cleaning Formulations, comprising at least one compound according to general formula (I) wherein the integers R1 are different or identical and selected from C3-C10-alkyl groups with at least two methyl groups per R1, YH is (AO)n—H, with AO being selected from —CH2CH2O— and CH2CH(R2)O— and being different or identical in the case of n>1 R2 being different or identical and selected from C1-C16-alkyl, branched or linear, n in the range of from 1 to 30, and the polydispersity being in the range of from 1.0 to 1.5.
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 application is related to a container made of a polymer and containing a single unit dose of a detergent composition. The detergent composition contains at least two complexing agents (A) dissolved in an aqueous medium. The complexing agents (A) are (A1) at least one alkali metal salt of methyl glycine diacetic acid (MGDA), and (A2) at least one alkali metal salt of glutamic acid diacetic acid (GLDA). The complexing agents (A1) and (A2) are partially neutralized with alkali and the weight ratio of (A1) and (A2) ranges from 1:9 to 9:1. The aqueous medium contains at least 25% by weight of water relative to the entire liquid phase.