Method for preparation of N-phosphonomethylglycine

Details Method for preparation of N-phosphonomethylglycine Method for preparation of N-phosphonomethylglycine

1983-05-31

1984-04-10

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 938

Patent

active

044420412

ABSTRACT:
A method for the preparation of N-phosphonomethylglycine is disclosed which comprises the steps of:
(1) reacting N-(diethylphoshonomethyl)iminobisethanol in an oxygen free atmosphere with an alkali metal hydroxide selected from the group consisting of sodium hydroxide and potassium hydroxide, in the presence of water as solvent and a catalyst selected from the group consisting of zinc oxide and cadmium oxide at a high temperature and pressure for a sufficient period of time to cause the reaction to go to completion, and
(2) acidifying the product formed.

REFERENCES:
patent: 3842081 (1974-10-01), Schulze et al.
patent: 3864369 (1975-02-01), Isa et al.
patent: 3907652 (1975-09-01), Wagenknecht et al.
patent: 3954848 (1976-05-01), Franz
patent: 3969398 (1976-07-01), Herschman
patent: 4067932 (1978-01-01), Muntz et al.
patent: 4147719 (1979-04-01), Franz

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