Abstract: A process for manufacturing 5,6-disubstituted-3-pyridylmethyl ammonium bromides (I), wherein Q is a tertiary aliphatic or cyclic, saturated, partially unsaturated or aromatic amine; Z is hydrogen or halogen; Z1 is hydrogen, halogen, cyano or nitro; Y and Y1 are each independently OR1, NR1R2, or when taken together YY1 is —O—, —S— or NR3—; R1 and R2 are each independently hydrogen, C1-C4 alkyl optionally substituted with C1-C4 alkoxy or phenyl optionally substituted with one to three C1-C4 alkyl groups, C1-C4 alkoxy groups or halogen atoms, or phenyl optionally substituted with one to three C1-C4 alkyl groups, C1-C4 alkoxy groups or halogen atoms; R3 is hydrogen or C1-C4 alkyl; comprises the steps of (i) reacting a compound of formula (II), wherein the symbols have the meaning given in formula (I), with bromine in the presence of a radical initiator in a solvent mixture comprising an aqueous phase and an organic phase, where the organic phase comprises a solvent selected from 1,2-dichloroethane

Abstract: A process for manufacturing 5,6-disubstituted-3-pyridylmethyl ammonium bromides (I), wherein Q is a tertiary aliphatic or cyclic, saturated, partially unsaturated or aromatic amine; Z is hydrogen or halogen; Z1 is hydrogen, halogen, cyano or nitro; Y and Y1 are each independently OR1, NR1R2, or when taken together YY1 is —O—, —S— or NR3—; R1 and R2 are each independently hydrogen, C1-C4 alkyl optionally substituted with C1-C4 alkoxy or phenyl optionally substituted with one to three C1-C4 alkyl groups, C1-C4 alkoxy groups or halogen atoms, or phenyl optionally substituted with one to three C1-C4 alkyl groups, C1-C4 alkoxy groups or halogen atoms; R3 is hydrogen or C1-C4 alkyl; comprises the steps of (i) reacting a compound of formula (II), wherein the symbols have the meaning given in formula (I), with bromine in the presence of a radical initiator in a solvent mixture comprising an aqueous phase and an organic phase, where the organic phase comprises a solvent selected from 1,2-dichloroethane,

Abstract: The invention relates to a process for preparing N-phosphono-methylglycine by reacting a hexahydrotriazine compound with a triacyl phosphite in an organic solvent, hydrolyzing the resulting phosphono compound after prior extraction into an aqueous phase and separation from the organic phase. The process avoids decomposition of the organic solvent during hydrolysis.

Abstract: The present invention relates to a process for the recovery of N-phosphonomethylglycine from an aqueous mixture which contains N-phosphonomethylglycine, ammonium halides, and alkali metal or alkaline earth metal halides and optionally organic impurities in dissolved form, where (a) the pH of the mixture is adjusted to a value in the range from 2 to 8, (b) a separation of the mixture on a selective nanofiltration membrane is performed, a retentate which is richer in N-phosphonomethylglycine and poorer in halides and a permeate which is richer in halides and poorer in N-phosphonomethylglycine being obtained, and (c) the N-phosphonomethylglycine is recovered from the retentate. The process according to the invention makes possible the recovery of the N-phosphonomethylglycine with simultaneous separation of the halide salts.

Abstract: The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.

Abstract: The present invention relates to a process for the preparation of &agr;-aminophosphonic acids by reaction of a hexahydrotriazine derivative with a triorganyl phosphite. The process proceeds via the intermediate of a phosphono compound, which is hydrolyzed to the &agr;-aminophosphonic acid. The invention likewise relates to the phosphono compound itself and the process for its preparation. The process according to the invention gives &agr;-aminophosphonic acids in high yield and purity in a simple and inexpensive manner.

Abstract: The invention relates to a process for preparing N-phosphono-methylglycine by reacting a hexahydrotriazine compound with a triacyl phosphite in an organic solvent, hydrolyzing the resulting phosphono compound after prior extraction into an aqueous phase and separation from the organic phase. The process avoids decomposition of the organic solvent during hydrolysis.

Abstract: The present invention relates to a process for the recovery of N-phosphonomethylglycine from an aqueous mixture which contains N-phosphonomethylglycine, ammonium halides, and alkali metal or alkaline earth metal halides and optionally organic impurities in dissolved form, where

Abstract: The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.

Abstract: The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.

Abstract: The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.

Abstract: The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.

Abstract: The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.

Abstract: The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.

Abstract: A process for purifying creatine is described in which the creatine to be purified in the form free of water of crystallization is introduced into a saturated aqueous solution of creatine monohydrate, in which the creatine free of water of crystallization is dissolved with hydration, crystals of creatine monohydrate precipitate from the aqueous solution and these are separated off from the aqueous solution.