pH neutralization while succinic acid adsorption onto anion-exchange resins.
Succinic acid is a useful chemical and its purification from fermentation broth by ion-exchange resins has widely drawn attention. In this study, pH neutralization in the process of adsorption of succinic acid from model solutions and fermentation broth by anion-exchange resin NERCB 04 has been tested. Adsorption capacity of NERCB 04 was about 0.41 g succinic acid/g resin at concentrations of succinic acid in the range of 10-50 g/L in packed column. In the process of succinic acid removal, pH of the system could also be neutralized. The neutralizing ability of the resin as a neutralizing agent has also been studied in the model cycle system and in the real fermentation cycle process. It was found that NERCB 04 showed stable adsorption capacity and pH neutralization ability after each regeneration. A certain amount of anion-exchange resin could neutralize the low pH values (pH 2-5) and maintain the system around pH 7.0. This means the anion-exchange resins have the function of neutralizing reagent in the process of adsorbing succinic acid.
Li
Qiang
Q
Institute of Process Engineering, Chinese Academy of Sciences, Beijing, People's Republic of China.
Li
Wang-liang
WL
Wang
Dan
D
Liu
Bin-bin
BB
Tang
Huang
H
Yang
Mao-hua
MH
Liu
Qing-fen
QF
Xing
Jian-min
JM
Su
Zhi-guo
ZG
D000188:Actinobacillus / Q000737:chemistry / Q000378:metabolism; D000327:Adsorption; D000837:Anion Exchange Resins / Q000737:chemistry*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D019802:Succinic Acid / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism
D000837:Anion Exchange Resins; D019802:Succinic Acid