The invention provides a process for the recovery of ascorbic acid from an aqueous feed solution containing the acid at a concentration of less then 0.7 mol/kg, including adsorbing a major portion of the ascorbic acid with a solid phase adsorbent resin selected from resins carrying a pyridine function and resins of similar or weaker basicity, separating the ascorbic acid-containing resin from residual aqueous solution, and subjecting the ascorbic acid-containing resin to a desorbing operation with a neutral solvent at a temperature of at least 20 °C higher than the termperature at which the adsorbtion is carried out, whereby there is obtained a solution of ascorbic acid in solvent in which the concentration of ascorbic acid is at least equal to its concentration in the aqueous feed solution.
Inventors:
EYAL, Aharon, Meir; (IL).
VITNER, Asher; (IL).
REUVENY, Tal; (IL).
Applicant:
YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEM[IL/IL]; 46 Jabotinsky Street, P.O. Box 4279, 91042 Jerusalem (IL) (All Except US).
EYAL, Aharon, Meir [IL/IL]; (IL) (US Only).
VITNER, Asher [IL/IL]; (IL) (US Only).
REUVENY, Tal [IL/IL]; (IL) (US Only).
WHALLEY, Kevin [GB/GB]; (GB) (SD only).