木聚糖基催化剂的制备及其催化合成苯并呫吨类化合物  

Preparation of Xylan-Based Catalyst and its Catalytic Synthesis of Benzoxanthene Derivatives

作　　者：马纪亮 向志华 林宇杨 彭新文[1] 孙润仓[2] MA Jiliang;XIANG Zhihua;LIN Yuyang;PENG Xinwen;SUN Runcang(State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong, China;School of Materials Science and Technology,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]北京林业大学材料科学与技术学院,北京100083

出　　处：《华南理工大学学报（自然科学版）》2018年第7期54-61,共8页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(21404043)~~

摘　　要：以自然界中含量丰富的木聚糖类半纤维素为原料,首先采用碳化-磺化两步法制备了木聚糖基固体酸催化剂;然后对催化剂催化合成苯并呫吨类化合物进行了研究,研究了催化剂用量、反应温度、反应时间对目标产物产率的影响;再次,研究了木聚糖基固体酸催化剂催化合成苯并呫吨类化合物的底物普适性;最后,对木聚糖基固体酸催化剂的循环使用性能进行了研究,并对木聚糖基固体酸催化剂的结构和表面形貌进行了表征.结果表明:当反应温度为90℃、反应时间为2 h、催化剂用量为40 mg时,木聚糖基固体酸催化剂催化合成苯并呫吨类化合物的性能达到最佳;在文中研究所得的最佳反应条件下,木聚糖基固体酸催化剂对催化醛类化合物、2-萘酚和环己二酮类化合物具有良好的底物普适性;木聚糖基固体酸催化剂在反应体系中稳定性较好,在重复使用5次后,其结构没有发生明显的变化.Preparation has been made for the xylan-based solid acid catalyst was used in the two steps of carbonization and sulfonation.The catalyst was applied to the synthesis of benzoxanthenes.A study was conducted of the effects of the reaction temperature,time and dosage of the catalyst on the transversion.Furthermore,the universality and reusability of xylan-based solid acid catalyst were also investigated.Meanwhile,the xylan-based solid acid catalyst was characterized by scanning electron microscope(SEM),Fourier transform infrared spectra(FT-IR)and elemental analysis(EA).The results showed that the catalyst exhibited high catalytic performance in the synthesis of benzoxanthene and their derivatives with good yields at 90℃for 2 h in the presence of xylan-based solid acid(40 mg).The catalyst could be reused for several times without significant loss in its catalytic activity,indicating that the catalyst possessed excellent stability and recyclability.

关 键 词：木聚糖类半纤维素 固体酸催化剂 催化反应 产率 苯并呫吨类化合物 

分 类 号：TQ253.1[化学工程—有机化工]