Patent ID: 6527690
Filing Date: 2003-03-04
Classification: C07C

Abstract:
A process for purifying and decolorizing a phenyl ester salt comprising the steps of:(a) combining a phenyl ester salt with a solvent to form a mixture, wherein the phenyl ester salt is substantially insoluble in the solvent; (b) stirring the mixture for a time sufficient to form a slurry; (c) collecting the phenyl ester salt from the slurry, (d) optionally drying the collected phenyl ester salt; (e) optionally recrystallizing the collected phenyl ester salt; (f) dissolving the collected phenyl ester salt in a solvent to form a solution; (g) decolorizing the solution; and (h) spray drying the solution to form a powder of the phenyl ester salt; wherein the phenyl ester salt powder has a higher purity and an improved color as compared to the starting phenyl ester salt.