求翻译：为了提高木质素的利用价值，本实验通过酸沉淀法提取稻草、芦苇造纸黑液中的碱木素，与硫酸、对甲酚进行酚化改性，利用相分离法提取木素酚。并通过控制温度、酸浓、反应时间来确定酚化反应的最佳工艺，并通过相应原料进行酚化反应，与碱木素酚化产品进行对比。通过红外、紫外光谱分析来考察酚化改性对碱木素结构的影响。是什么意思？

In order to improve the value of lignin, the experiment by acid precipitation method to extract the straw, reed black liquor alkali lignin with sulfuric acid, p-cresol, phenol modification, the use of the phase separation method to extract the lignin phenol. And by controlling the temperature, acid

In order to increase the use value lignin biodegradation aimed at the lab, by acid deposition (CVD), reed straw extract liquid paper in black wood of the alkali and sulfuric acid, and the BPA-free for a BPA-free, use the modified law separating phenol extraction of wood. And, through control of temp

In order to enhance the lignin the use value, this experiment passes the peracid precipitation method extraction straw, in the reed papermaking black liquor alkali lignin, with the sulfuric acid, the paracresol

In order to improve the utilization of lignin, experimental extraction by acid precipitation of rice straw, reeds of paper-making black liquor of alkali lignin, modification of phenol with sulfuric acid, cresol, extraction of lignin-phenol by phase separation method. And by controlling the temperatu