Abstract
The improved preparation of D-glucosamine hydrochloride from waste hypha residue of citric acid was reported. The use of HCl and acetic acid system as an acid hydrolysis reagent led to a significant increase in the yield of D-Glucosamine hydrochloride (GluHCl). Other effects of various factors on the preparation of GluHCl were also investigated: temperature of acidification, HCl concentration, and reaction time. The experimental conditions were optimized by a L9 (34) orthogonal array design (OAD) with four factors at three levels using statistical analysis. Under optimal conditions, the yield of GluHCl reached 5.2%.
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