Abstract: A process for manufacturing a nitrile compound through chain elongation of an alkylene amine compound containing three or more amine units in which at least two amine units are protected by a cyclic urea unit and at least one amine unit is not protected, includes reacting the at least one amine unit that is not protected with glycolonitrile or with the combination of formaldehyde and a cyanide compound selected from HCN and inorganic cyanide salts, to add at least one acetonitrile group to the at least one amine unit that is not protected.

Abstract: This disclosure provides a chelating composition having a pH of at least about 9 and comprising: water; and the tetrasodium salt of glutamic acid N,N-diacetic acid present in an amount of at least about 50 weight percent based on a total weight of the chelating composition as determined using an Fe-Total Sequestering Value, wherein the chelating composition has a viscosity of less than about 1350 mPa·s measured at about 5° C., or less than about 350 mPa·s measured at about 20° C., each using a Brookfield DV II plus viscometer with spindle S18 and a temperature controlled bath.

Abstract: A method includes combining monosodium glutamate and/or glutamic acid with formaldehyde to form a first combination; adding hydrogen cyanide to form a second combination comprising a monosodium salt of glutamic acid diacetonitrile, a cyclic GLMN, and a sodium salt of glutamic acid N-monoacetonitrile, maintaining a temperature of the second combination at less than about 16° C. and a pH of less than about 7; converting nitrile groups to carboxylate groups thereby forming a third combination comprising water and at least about 47 weight percent of the tetrasodium salt of GLDA, wherein a reaction yield is at least about 91%; providing a fourth combination comprising water and the tetrasodium salt of GLDA and having a pH of less than about 7; and combining the third and fourth combinations to form the chelating composition.

Abstract: A method of forming a chelating composition includes the steps of: providing a first mixture comprising water and a tetrasodium salt of glutamic acid N,N-diacetic acid and having a pH of greater than about 10; and acidifying the first mixture via ion exchange and/or bipolar membrane electrodialysis to reduce a pH of the chelating composition to a pH of at least about 9; wherein the chelating composition comprises the tetrasodium salt of glutamic acid N,N-diacetic acid in an amount of at least about 50 weight percent based on a total weight of the chelating composition as determined using an Fe-Total Sequestering Value; and wherein the chelating composition has a viscosity of less than about 1350 mPa·s measured at about 5° C., or less than about 350 mPa·s measured at about 20° C., each using a Brookfield DV II plus viscometer with spindle S18 and a temperature controlled bath.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present invention relates to a process comprising the reaction of a cyanide with a hydrogen cyanide-reactive compound, characterized in that the cyanide is a cyanide salt and the process is an electrochemical process involving the transporting of a reaction mixture to which cyanide salt has been added through an electrochemical cell, in which process the cyanide salt reacts with the hydrogen cyanide-reactive compound while at least partly under the influence of an electric current the cyanide salt is acidified and the salt cation content is reduced.

Abstract: The present invention relates to an alkalimetal salt of glutamic acid-N,N-diacetic acid (GLDA) of the formula NaxKyHzGLDA, 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.

Abstract: 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.

Abstract: The present invention relates to a process comprising the reaction of a cyanide with a hydrogen cyanide-reactive compound, characterized in that the cyanide is a cyanide salt and the process is an electrochemical process involving the transporting of a reaction mixture to which cyanide salt has been added through an electrochemical cell, in which process the cyanide salt reacts with the hydrogen cyanide-reactive compound while at least partly under the influence of an electric current the cyanide salt is acidified and the salt cation content is reduced.

Abstract: The present invention relates to an alkalimetal salt of glutamic acid-N,N-diacetic acid (GLDA) of the formula NaxKyHzGLDA, 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.

Abstract: 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-acetonithle, potassium or sodium glutamate N-acetic amide N-acetonitrile, to processes to prepare such compounds and the use thereof.

Abstract: 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 Ma+ and the entire reaction is carried out under hydrolyzing conditions if any of the reactants contain or form nitrile or amide groups.

Abstract: The invention pertains to a cross-linkable fluorinated polymer comprising the carbonate moiety having formula (I) wherein n=1-10 and m=0-9. Preferably, the polymer further comprises a cross-linkable moiety derived from a diol selected from (II) and (III) wherein A, A1, and A2 are independently a bond or C1-12 alkylene, or together with the carbon atoms to which they are bonded form a 5- or 6-membered ring; B is independently O or C1-4 alkyl; Q is —CO—C(=E)D, wherein D is H or C1-4 alkyl, and E is C1-6 alkylidene; and each of the alkyl, alkylene, and alkylidene groups may be halogenated. The polymers of the invention can be used in cladding layers or waveguides, in particular for thermo-optical devices.

Abstract: 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 Ma+ and the entire reaction is carried out under hydrolyzing conditions if any of the reactants contain or form nitrile or amide groups.

Abstract: The invention pertains to a cross-linker of the formula wherein n is 0 or 1; m is 0 or 1; R is and R1 is independently OH or —CO—O(hydroxyphenyl), or of the formula with the proviso that 3,4-dihydroxyphenylmaleimide is excluded. The invention further pertains to cross-linked optical polycarbonate and optical articles obtainable by cross-linking a polycarbonate with this cross-linker or with 3,4-dihydroxyphenylmaleimide.

Abstract: The present invention is in the field of optical polymers, more particularly, optical polycarbonates for use in optical components.The present invention provides a cross-linkable or cross-linked optical polycarbonate built up from a monomer mixture comprising:compounds according to formula 1: ##STR1## wherein: P stands for --Cl, O--R, an imidazole group or --O--Ph, Q stands for --Cl, O--R, an imidazole group or --O--Ph,R stands for an alkylene group having 1-6 carbon atoms,Ph stands for phenyl,A stands for --Ph--, halogenated --Ph--, (halo)alkyl substituted --Ph, --Ph--Ph--, halogenated --Ph--Ph, --Ph--C(CH.sub.3).sub.2 --Ph--, --Ph--SO.sub.2 --Ph--, --Ph--C(CF.sub.3)--Ph--, halogenated --Ph--C(CH.sub.3).sub.2 --Ph, halogenated --Ph--C(CF.sub.3).sub.2 --Ph, phenolphtalein, --Ph--C(Ph).sub.2 --Ph,m is an integer from 0 to 5, with the A-groups being the same or different,optionally, diols, optionally, a dihydroxy-functionalised NLO-compound, and 2,3 dihydroxy propyl methacrylate as a crosslinker.

Abstract: The invention relates to non-linear optically active (NLO) polycarbonates and to NLO active waveguides containing these polycarbonates. Waveguides containing these NLO polycarbonates have a low loss of signal, a high glass transition temperature and good polability and a high stability of the Pockel's coefficient.