Process for purifying mesotrione

Details Process for purifying mesotrione Process for purifying mesotrione

2011-01-04

2011-01-04

Sullivan, Daniel M (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C568S030000

Reexamination Certificate

active

07863482

ABSTRACT:
A method for reducing the cyanide levels in a mesotrione sample, said method comprising: (i) taking an aqueous solution of the mesotrione sample in an aqueous solvent, (ii) adjusting the pH of said aqueous solution to a value of 9.5 or higher, and (iii) crystallising the mesotrione out of solution is disclosed.

REFERENCES:
patent: 4695673 (1987-09-01), Heather et al.
patent: 4937386 (1990-06-01), Ueda et al.
patent: 5085688 (1992-02-01), Michaely et al.
patent: 6218579 (2001-04-01), Jones et al.
patent: 7285678 (2007-10-01), Javdani et al.

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