Process for preparing N-phosphonomethyl-glycine

Details Process for preparing N-phosphonomethyl-glycine Process for preparing N-phosphonomethyl-glycine

1989-10-24

1991-01-08

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus acids or salts thereof

C07F 938

Patent

active

049837648

ABSTRACT:
The invention relates to an improvement of a process for preparing N-phosphonomethyl-glycine by oxydation of N-phosphonomethyl-imino-diacetic acid in an aqueous sulphuric acidic medium with hydrogen peroxide.
A characteristic feature is using a waste acid liquor as reaction medium formed as aqueous sulphuric acid and obtained after the separation of N-phosphonomethyl-glycine when carrying out oxydation. This solution is optionally diluted with water until a concentration of 12-18 weight % of sulphuric acid and 3-5 weight % of N-phosphonomethyl-glycine.

REFERENCES:
patent: 3950402 (1976-04-01), Franz
patent: 3954848 (1976-05-01), Franz

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