Jeffery R Robbins

US Patent:

46055223, Aug 12, 1986

Filed:

Nov 19, 1984

Appl. No.:

6/672323

Inventors:

Jeffery D. Robbins - Berkeley CA

Assignee:

Stauffer Chemical Company - Westport CT

International Classification:

C07F 938

US Classification:

2605025F

Abstract:

A method for the production of N-phosphonomethylglycine and soluble salts thereof is disclosed in which glycinemethylenephosphinic acid or its soluble salts are reacted with an excess of an alkali or alkaline earth base for a period of time and at a sufficient temperature to cause oxidation of the glycinemethylenephosphinic acid or its soluble salts thereof to N-phosphonomethylglycine salts, from which N-phosphonomethylglycine may be obtained by acidification. The N-phosphonomethyleglycine or its soluble salts, are used as herbicides.