The utilization of compressed CO2 as an anti-solvent to precipitate chitosan from acetate-based ionic liquid (IL) solution is presented. Volume expansion and solvatochromic behavior of IL are investigated to explain the precipitation mechanism. The regenerated chitosan is characterized and utilized as a catalyst in the formation of imines efficiently.
X. Sun, Z. Xue and T. Mu, Green Chem., 2014, 16, 2102 DOI: 10.1039/C3GC42166J
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