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

• Main Authors: 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
• Language: English
• Published: 15.01.1991
• Edition: 5
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; AGRICULTURE; ANIMAL HUSBANDRY; APPARATUS THEREFOR; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMISTRY; FISHING; FORESTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; HUMAN NECESSITIES; HUNTING; METALLURGY; ORGANIC CHEMISTRY; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; TRAPPING

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.