Lacunary silicotungstic heteropoly salts as high-performance catalysts in oxidation of cyclopentene  

作　　者：Peiyin Chen Yanxiong Fang Kaihong Xie Yao Chen Yang Liu Hongliang Zuo Weijian Lu Baoyu Liu 

机构地区：[1]School of Chemical Engineering and Light Industry,Guangdong Provincial Key Laboratory of Plant Resources Biorefinery,Guangzhou Key Laboratory of Clean Transportation Energy Chemistry,Guangdong University of Technology,Guangzhou 510006,China [2]Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory),Jieyang 515200,China [3]Guangdong Xinhuayue Petrochemical Group Stock Company,No.18,Youcheng 4 Road,Maoming 525000,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第4期152-159,共8页中国化学工程学报（英文版）

基　　金：the Science and Technology Project of Maoming(China)(200203094555139)for financial support。

摘　　要：The development of polyoxometalates for olefin oxidation is critical to achieving the green chemical process of the C5 fraction further processing.Di-lacunary silicotungstic anions were easily obtained by continuously adjusting the p H instead of the traditional step-by-step method,which exhibited excellent performance in the catalytic oxidation of cyclopentene(CPE)to aldehydes or alcohols.The 93.69%CPE conversion and 97.15%total product selectivity(41.38%for glutaraldehyde(GA)and 55.77%for 1,2-cyclopentanediol(1,2-diol)were achieved by using H_(2)O_(2)as the oxidant and acetonitrile as the solvent.Through complementary characterization,it was found that the optimized di-lacunary silicotungstic polyoxometalate retained a complete Keggin structure,and exhibited better catalytic activity and stability than the mono-lacunary or saturated silicodecatungstate because it exposed more catalytic active centers.Furthermore,in situ FT-IR spectra was utilized to monitor the reaction process,revealing the formation of the active species W(O_(2))on the di-lacunary silicotungstic polyoxometalate and the intermediate epoxycyclopentane during the catalytic oxidation of cyclopentene.

关 键 词：Lacunary silicotungstic heteropoly salts Cyclopentene(CPE) Catalytic oxidation Glutaraldehyde(GA) 1 2-Cyclopentanediol(1 2-diol) 

分 类 号：TQ233[化学工程—有机化工] TQ426