两亲催化剂TS-1@Si/C催化α-蒎烯环氧化反应  

Epoxidation ofα-Pinene Catalyzed by Amphiphilic Catalyst TS-1@Si/C

作　　者：邢晨 解从霞[1] XING Chen;XIE Congxia(College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2022年第6期11-20,共10页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(32071710)。

摘　　要：通过水热法制备出两亲介孔核壳材料TS-1@Si/C,采用SEM、TEM、XRD、氨气程序升温脱附等手段对其形貌和结构进行了表征。以TS-1@Si/C催化双氧水环氧化α-蒎烯合成2,3-环氧蒎烷。当n(Si)/n(Ti)为30,n(Si)/n(C)为14,催化剂的催化活性最高,反应工艺条件:α-蒎烯3 mmol,m(催化剂)/m(α-蒎烯)=7.1%,双氧水50 mmol,乙腈10 mL,水4 mL,碳酸钾2 mmol,50℃,4 h。α-蒎烯的转化率达到81.41%,2,3-环氧蒎烷的选择性为82.80%,催化剂可循环使用4次,催化活性有所下降。两亲性催化剂能形成水-油-固三相稳定界面,增大了反应底物在水相中的浓度,显著提高了催化α-蒎烯环氧化反应活性。Amphiphilic mesoporous core-shell material TS-1@Si/C was prepared by hydrothermal method,and the morphology and structure of TS-1@Si/C were characterized by SEM,TEM,XRD and ammonia temperature programmed desorption.By using TS-1@Si/C as catalyst,2,3-epoxypinane was synthesized fromα-pinene with hydrogen peroxide as oxidant.When the n(Si)/n(Ti)molar ratio is 30 and the n(Si)/n(C)molar ratio is 14,the catalyst has the highest activity.The reaction conditions are as follows:α-pinene 3 mmol,catalyst(7.1%of the mass ratio ofα-pinene),hydrogen peroxide 50 mmol,acetonitrile 10 mL,water 4 mL,potassium carbonate 2 mmol,50℃,and 4 h.The conversion ofα-pinene was 81.41%,and the selectivity of 2,3-epoxypinane was 82.80%.The catalyst could be reused for 4 times,and the catalytic activity decreased.Amphiphilic catalyst can form stable water-oil-solid interface,increase the concentration of reaction substrate in the aqueous phase,and significantly improve the catalytic performance of epoxidation ofα-pinene.

关 键 词：水热合成 两亲性材料 Α-蒎烯 环氧化 水相反应 

分 类 号：O621[理学—有机化学] O614.41[理学—化学]