Process for preparation of crystallized monohydrated sodium...

Details Process for preparation of crystallized monohydrated sodium... Process for preparation of crystallized monohydrated sodium...

C - Chemistry, Metallurgy

07

C

260/515.3

C07C 59/84 (2006.01) C07C 51/00 (2006.01) C07C 51/41 (2006.01)

Patent

CA 1223885

ABSTRACT OF THE DISCLOSURE The invention concerns a process for preparation of crystallized monohydrated sodium phenylpyruvate comprising : hot reacting benzaldehyde in an aqueous medium in the presence of a catalytic quantity of ethanolamine with the stoichiometric quantity of hydantoin, then treating the reactional medium hot at pH = 14 through an excess of sodium hydroxide, acidifying to pH = 9 with concentrated hydrochloric acid the so obtained solution and separating the formed precipitate.

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