磷酸活化-微波炭化法制备炭基磺酸及其催化性能研究

Study on Preparation of Carbon-Based Sulfonic Acid by Phosphoric Acid-Microwave Activated Carbonization and Its Catalytic Performance

以竹加工业副产物竹粉为原料,利用磷酸活化-微波炭化法制备新型炭基固体磺酸催化剂.设计正交试验考察竹粉与磷酸固液比、磷酸浓度、微波功率与微波时间对所制备的炭基固体磺酸样品中的磺酸量的影响.结果表明:新型炭基磺酸催化剂适宜的制备条件为:固液比为1∶6,磷酸质量分数为40%,浸渍时间12 h,微波功率为800 W,微波时间为20 min.催化剂在合成环己酮乙二醇缩酮的反应中表现出优良的催化活性和重复使用性.与传统的炭化方法相比,磷酸活化-微波炭化法具有加热快、效率高、能耗低、生产周期短等优点.

A novel char sulfonic solid acid catalyst was prepared by using phosphoric acid activated-microwave carbonization method using waste bamboo powder as the raw material. The impact of the ratio of solid to liquid, concentration of phosphoric acid, microwave power and time on the amount of sulfonic acid consumed in the carbon-based solid sulfonic acid samples were thoroughly investigated by the orthogonal design. Our results showed that the optimal preparation conditionis are as follows： the solid-liquid ratio was 1：6, the volume fraction of phosphoric acid was 40%, dipping time 12 h, microwave power 800 W, and microwave time 20 mins. This catalyst showed excellent catalytic activities and reusability in the synthesis of eyclohexanone ethylene ketal. Compared with the conventional carbonization method, our phosphoric acid activated-microwave carbonization method has following advantages： fast heating, high efficiency, low energy consumption, and short production cycle.