“一锅法”合成双金属催化剂Co-Ti-SBA-15及其环氧化性能研究  

“One-spot”method synthesis of bimetallic catalyst Co-Ti-SBA-15 and study on its application in catalytic epoxidation of olefins

作　　者：张建 尚琼 魏慧娟 徐大乾 李洵洲 ZHANG Jian;SHANG Qiong;WEI Hui-juan;XU Da-qian;LI Xun-zhou(School of Chemistry and Chemical Engineering,Lanzhou City University,Lanzhou 730070,China;Shanghai Intron Food Co.,Ltd.,Shanghai 201806,China)

机构地区：[1]兰州城市学院化学化工学院,甘肃兰州730070 [2]上海赢创食品发展有限公司,上海201806

出　　处：《现代化工》2019年第12期166-170,175,共6页Modern Chemical Industry

基　　金：2018年兰州城市学院博士科研启动基金项目(LZCU-BS2018-30)

摘　　要：以硝酸钴和钛酸四丁酯为金属前驱体,采用"一锅法"制备了Co-SBA-15-(180)、Ti-SBA-15-(36)和Co-Ti-SBA-15-(30)-(5)催化剂,并用于催化烯烃环氧化反应中。采用N2吸附脱附、X-射线衍射、透射电子显微镜、扫描电子显微镜和X-射线能谱技术对催化剂进行表征。结果表明,在反应温度为80℃、1,2-二氯乙烷用量为10 mL、催化剂质量为100 mg、环己烯物质的量为10 mmol、叔丁基过氧化氢物质的量为10 mmol、反应时间为8 h的条件下,Co-Ti-SBA-15-(30)-(5)双金属催化剂对环己烯进行环氧化的转化率和选择性分别达到了92.70%和94.67%,明显高于Co-SBA-15-(180)和Ti-SBA-15-(36)单金属催化剂。Co-SBA-15-(180),Ti-SBA-15-(36)and Co-Ti-SBA-15-(30)-(5)are prepared by"one-spot"technique using cobaltous nitrate hexahydrate and tetrabutyl titanate as metal precursors.These catalysts are used to catalyze the epoxidation of olefins.The catalysts are well characterized by N2 adsorption-desorption,X-Ray diffractions(XRD),transmission electron microscopy(TEM),scanning electron microscopy(SEM)and energy-dispersive X-ray spectroscopy(EDS).The conversion and selectivity of cyclohexene epoxidation reach 92.70%and 94.67%,respectively when 100 mg of Co-Ti-SBA-15-(30)-(5)catalyst is added,reaction temperature is at 80℃,dosage of 1,2-dichloroethane is 10 m L,the amount of cyclohexene is 10 mmol,dosage of TBHP is 10 mmol,and reaction lasts for 8 h.The catalytic performance of Co-Ti-SBA-15-(30)-(5)is higher than that of Co-SBA-15-(180)and Ti-SBA-15-(36)monometallic catalysts.

关 键 词：烯烃 环氧化 双金属催化剂 介孔材料 

分 类 号：O631[理学—高分子化学]