Use of infrared spectroscopy for on-line process control and endpoint detection

   
   

The present invention is directed to an analytical method for measuring the concentration of an N-(phosphonomethyl)iminodiacetic acid ("NPMIDA") substrate, an N-(phosphonomethyl)glycine product, formaldehyde, formic acid, N-methyl-N-(phosphonomethyl)glycine ("NMG"), N-methyl-aminomethylphosphonic acid (MAMPA) or aminomethylphosphonic acid ("AMPA")) in an aqueous mixture thereof, using infrared spectroscopy. The present invention is also directed to a process for oxidizing an N-(phosphonomethyl)iminodiacetic acid substrate to form a N-(phosphonomethyl)glycine product, and as part of the process, measuring the concentration of at least one reactant, product or byproduct of the oxidation reaction using the analytical method of the present invention and controlling the oxidation process in response to the measurement taken.

A invenção atual é dirigida a um método analítico para medir a concentração de uma carcaça ácida de N-(phosphonomethyl)iminodiacetic ("NPMIDA"), do ácido N-n-methyl-N-(phosphonomethyl)glycine-N-(phosphonomethyl)glycine ("NMG"), N-n-methyl-aminomethylphosphonic-aminomethylphosphonic de um produto de N-(phosphonomethyl)glycine, de um formaldehyde, do ácido formic, (MAMPA) ou do ácido aminomethylphosphonic ("AMPA")) em uma mistura aqueous disso, usando o spectroscopy infravermelho. A invenção atual é dirigida também a um processo para oxidar uma carcaça ácida de N-(phosphonomethyl)iminodiacetic para dar forma a um produto de N-(phosphonomethyl)glycine, e como a parte do processo, medindo a concentração ao menos de um reactant, o produto ou o byproduct da reação da oxidação usando o método analítico da invenção atual e controlando o processo da oxidação em resposta à medida feita exame.

 
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