Fig. 7From: A new approach to recycle oxalic acid during lignocellulose pretreatment for xylose productionSugar contents in hydrolysate for pretreatment with recycled oxalic acid. The reaction temperature and time were 140 °C and 2.5 h. 25 mL 150 mmol/L oxalic acid solution was additionally added at the preparation of Mixed Solution 2 for fourth cycleBack to article page