Separation of polysaccharides from rice husk and wheat bran using solvent system consisting of BMIMOAc and DMI.
A solvent system consisting of 1,3-dimethyl-2-imidazolidinone (DMI), and ionic liquid 1-butyl-3-methylimidazolium acetate (BMIMOAc) was used to separate polysaccharides from rice husk and wheat bran. The effects of the DMI/BMIMOAc ratios, temperature, and time on the dissolution of rice husk and wheat bran were investigated, and the influence of anti-solvents on the regeneration of polysaccharides-rich material was evaluated. We found that the solvent system is more powerful to dissolve rice husk and wheat bran than pure BMIMOAc, and that polysaccharides-rich material can be effectively separated from the biomass solution. The polysaccharides content of regenerated material from wheat bran can reach as high as 94.4% when ethanol was used as anti-solvents. Under optimized conditions, the extraction rate of polysaccharides for wheat bran can reach as high as 71.8% at merely 50°C. The recycled solvent system exhibited constant ability to separate polysaccharides from rice husk and wheat bran.
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Qidong
Q
Hou
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Weizun
W
Li
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China. Electronic address: jumeit@nankai.edu.cn.
Meiting
M
Ju
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Le
L
Liu
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Yu
Y
Chen
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Qian
Q
Yang
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Jingyu
J
Wang
D018533:Biomass; D005591:Chemical Fractionation / Q000379:methods*; D004043:Dietary Fiber; D007093:Imidazoles / Q000737:chemistry*; D008970:Molecular Weight; D012275:Oryza / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry / Q000302:isolation & purification*; D012997:Solvents / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014783:Viscosity
C525963:1-butyl-3-methylimidazolium; D004043:Dietary Fiber; D007093:Imidazoles; D011134:Polysaccharides; D012997:Solvents; C583574:1,3-dimethyl-2-imidazolidinone
Dissolution; Polysaccharides; Separation; Solvent system