Patent ID: 6153791
Filing Date: 2000-11-28
Classification: C07C

Abstract:
A process for the purification of 2-keto-L-gulonic acid using a plurality of chambers, each of said plurality of chambers containing solid particulate matter and having an inlet and an outlet, said process comprising the steps of:(a) introducing an aqueous solution containing 2-keto-L-gulonic acid into one of said plurality of chambers through said inlet thereof such that said aqueous solution contacts said solid particulate material therein and then exits through said outlet thereof;(b) introducing a solvent into said chamber through said inlet thereof such that said aqueous solution contacts said solid particulate material therein and then exits through said outlet thereof;(c) conducting said aqueous solution exiting said chamber through said outlet thereof to another chamber of said plurality of chambers;(d) collecting said solvent exiting said chamber through said outlet thereof;(e) introducing said aqueous solution into said another chamber of said plurality of chambers through said inlet thereof such that said aqueous solution contacts said solid particulate material therein and then exits through said outlet thereof; and(f) repeating steps (b)-(e) for each chamber of said plurality of chambers.