微波加热下竹粉苯酚液化的优化工艺研究

Technology Optimization of Bamboo Powder Liquefaction with Phenol Under Microwave Heating Conditions

以苯酚为液化剂,浓硫酸为催化剂,采用微波加热对竹粉进行液化处理,研究液化条件对液化残渣率的影响,结果表明:竹粉微波液化的优化工艺参数为:微波加热时间8 min、液固比4.5∶1.0、反应温度150℃、催化剂用量9%、微波功率500 W,在此工艺下液化产物的残渣率仅为0.327%;在微波液化过程中,温度是影响液化效率最主要的因素,然后依次是催化剂用量、反应时间、液固比;红外光谱分析表明,竹粉苯酚液化后,芳环被引入到竹粉的分子结构中。

The bamboo powder was liquefied with microwave heating by taking phenol as the liquefying rea-gents and sulfuric acid as catalytic.The effect of different liquefying factors on residue rate was studied.The results showed that the optimum technological parameters included 500 W for microwave power,4.5∶1 .0 as the liquid-solid ratio,9 % of sulfuric acid as catalytic reagent,8 minutes as the reaction duration under 155 ℃ as reaction temperature.Only 0.327 %of residue rate occurred under above optimal conditions. It was found out that tempera-ture was the most important factor to influence the liquefaction effect in the liquefying process,followed by the cata-lyst dosage,reaction time duration,and the liquid-solid ratio.The IR spectrum analysis showed that the aromatic ring was introduced into the molecular structure of bamboo powder after the liquefaction process.