METHOD OF PHOSPHONOMETHYLLIMINODACETIC ACID'S AND C 1-4 CARBOXYL ACID'S CHLORIDE SIMULTANEOUS PREPARATION

N-Phosphono-methyl-imino-diacetic acid and a carboxylic acid chloride are prepared simultaneously by reacting phosphorus-trichloride and C1-4 carboxylic acid in a molar ratio of 1:3 at a temperature between 0-20 DEG C, separating the phosphorous acidic phase formed from the carboxylic acid chloride...

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Hauptverfasser: KARACSONYI BELA ,HU, BENCZIK JANOSNE,HU, BALINT SANDOR ,HU, LENDVAI LASZLO ,HU, PELYVA JENO ,HU, KOLONICS ZOLTAN ,HU, LASZLO SANDOR ,HU, KAYOS CSABA,HU, SOPTEI CSABA ,HU
Format: Patent
Sprache:eng
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Zusammenfassung:N-Phosphono-methyl-imino-diacetic acid and a carboxylic acid chloride are prepared simultaneously by reacting phosphorus-trichloride and C1-4 carboxylic acid in a molar ratio of 1:3 at a temperature between 0-20 DEG C, separating the phosphorous acidic phase formed from the carboxylic acid chloride which is isolated, reacting the phosphorous acidic phase containing carboxylic acid and carboxylic acid chloride after dilution with water with imino-diacetic acid and an aqueous solution of formaldehyde, the molar ratio of imino-diacetic acid to phosphorous acid and formaldehyde being about 1:1-1.1 : 1-1.2 in the presence of an added strong mineral acid, preferably hydrochloric acid, at a temperature between 60-120 DEG C, and evaporating the mixture unitl the separation of the crystals.