Patent ID: 6558930
Filing Date: 2003-05-06
Classification: A23L,C08B,C12P

Abstract:
A method for preparing ferulic acid in free form from cereal bran comprising the steps of:(a) injecting milled defatted cereal bran into a corotating intermeshed twin screw extruder with a feed rate of about 20 to about 50 kg/hr; (b) maintaining the screw rate at about 200 to about 500 revolutions per minute, the moisture content at about 15 to about 40% and the temperature at about 100 to about 200Â° C.; (c) suspending the extrudate in water and adding cell-wall hydrolyzing enzymes in a weight ratio of about 1.0:0.001 to about 1.0:0.1 and maintaining the mixture with stirring at about 30 to about 60 minutes at a temperature of about 30 to about 60Â° C., (d) extracting the hydrolysate with ethyl acetate, evaporating the ethyl acetate and recovering the ferulic acid.