Gum Arabic

an ideal raw material for preparing L-arabinose

can be catalytically hydrolyzed by sulfur acid to obtain the hydrolysate containing L-arabinose

D-galactose and L-rhamnose. In order to ensure the stability of subsequent purification process as well as product quality

optimization of the acid hydrolysis process is necessary. In this work

single factor experiments are performed to determine the key parameters of acid hydrolysis reaction. The effects of reaction time

acid concentration

temperature and solid-to-liquid ratio on the hydrolysis are investigated. The results show that the temperature affects more significantly on the yield rate of L-arabinose. The degree of hydrolysis as high as 85% and the relative purity of L-arabinose up to 85% or 87% can be obtained under the optimized hydrolysis conditions of 90 min reaction at 100℃ or 200 min reaction at 90℃ with 0.1 mol·L-1 H2SO4 and solid-to-liquid ratio of 1:10 (g/ml).