Preparation of ammonium glyphosate using aqueous ammonium hydrox

Details Preparation of ammonium glyphosate using aqueous ammonium hydrox Preparation of ammonium glyphosate using aqueous ammonium hydrox

1997-01-03

1998-02-10

Clardy, S. Mark

Plant protecting and regulating compositions

Plant growth regulating compositions

Organic active compound containing

A01N 5702

Patent

active

057169039

ABSTRACT:
Solid N-phosphonomethylglycine or glyphosate acid is charged to a substantially closed system and then partially pre-dried as by continuously recirculating it through a hot air grinding/drying system. A cooled solution of ammonium hydroxide is then metered into and reacted with the partially dried glyphosate acid as it is being recirculated in a manner such that the moisture content of the reaction mass so formed is continuously decreased throughout the reaction. Following completion of the ammonium hydroxide addition, a powdered reaction mass/product having a moisture content of about 2 wt. % is formed. Significantly, at this stage, the ammonium glyphosate product is suitable for end use and it can be readily dissolved in water and immediately used as a herbicide or plant growth regulator. More importantly, however, this product is capable due to its highly sorptive character to be further formulated into a product exceptionally highly loaded with adjuvants and particularly surfactants.

REFERENCES:
patent: 4840659 (1989-06-01), Franz
patent: 5047079 (1991-09-01), Djafar et al.
patent: 5070197 (1991-12-01), Chin et al.
patent: 5266553 (1993-11-01), Champion
patent: 5324708 (1994-06-01), Moreno
patent: 5430005 (1995-07-01), Kassebaum et al.

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