Chemical Engineering Research & Design, Vol.90, No.9, 1189-1196, 2012
A new approach to catalytic hydrolysis of ester-bound biphenyl cyclooctene lignans from the fruit of Schisandra chinensis Baill by ion exchange resin
In this study, a novel approach was developed to hydrolyze ester-bound biphenyl cyclooctene lignans (EBBCL) from the fruits of Schisandra chinensis Baill into free-state biphenyl cyclooctene lignans (FSBCL) using ion exchange resin. The results of static hydrolysis tests showed that SK1B (H-type strongly acidic cation exchange resin) was the best acidic hydrolysis catalyst and 201 x 7 (OH-type strongly basic anion exchange resin) was the best basic hydrolysis catalyst. According to the underlying mechanism for hydrolytic degradation, the hydrolysis effect of basic catalyst is more obviously. The dynamic hydrolysis efficiency of 201 x 7 (146.7 +/- 5.0%) was higher than that of SK1B (131.5 +/- 4.7%). Compared with the purity of FSBCL (3.52 +/- 0.06%) catalytic hydrolysis by traditional catalyst NaOH, the purity of FSBCL (5.85 +/- 0.04%) hydrolysis by 201 x 7 resin was much higher, increased 2.94-fold under the optimization hydrolysis conditions. Crown Copyright (C) 2012 Published by Elsevier B.V. on behalf of The Institution of Chemical Engineers. All rights reserved.
Keywords:Schisandra chinensis Baill;Biphenyl cyclooctene lignans;Catalytic hydrolysis;Ion exchange resin