Synthesis of cis-Dioxomolybdenum(Ⅵ)-tridentate Schiff Base Complexes and Its Catalytic Activity on the Epoxidation of Soybean Oil

doi:10.7503/cjcu20121093

Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (7): 1703.doi: 10.7503/cjcu20121093

• Physical Chemistry • Previous Articles Next Articles

Synthesis of cis-Dioxomolybdenum(Ⅵ)-tridentate Schiff Base Complexes and Its Catalytic Activity on the Epoxidation of Soybean Oil

ZHANG Shu-Yuan¹, JIANG Ping-Ping¹, LENG Yan¹, XU Yu-Cheng², MO Guan-Tian², BIAN Gang¹

1. Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China;
2. Guangzhou Xinjinlong Chemical Additives Co., Ltd, Guangzhou 510800, China

Received:2012-12-04 Online:2013-07-10 Published:2013-06-21
Contact: JIANG Ping-Ping E-mail:ppjiang@jiangnan.edu.cn

Abstract

Abstract:

The tridentate Schiff base ligand salicylaldehyde-2-hydroxyanil(H₂SAP) was obtained via a Schiff base condensation reaction between salicylaldehyde and o-aminophenol in ethanol medium. cis-Dioxomolybdenum(Ⅵ)-tridentate Schiff base complex MoO₂(SAP)(EtOH) was synthesized by mixing H₂SAP with a solution of MoO₂(acac)₂ in ethanol. MoO₂(SAP)(EtOH) was characterized and its catalytic activity was examined for epoxidation of soybean oil(SBO). The effects of types of oxidants, reaction temperature, time, solvent and additives on the epoxidation of SBO were discussed in detail. The conversion and selectivity of epoxidized soybean oil(ESO) reach 43.0% and 67.2%, respectively, at 80℃ for 4 h, with tert-butyl hydroperoxide(65% TBHP, mass fraction) as oxidant. Meanwhile, the epoxide yield was related to the nature of additives. The yield of ESO reduced dramatically by adding strong coordinating ligands such as imidazole. The mechanism of interaction between the catalyst and oxidant was also investigated.

Key words: cis-Dioxomolybdenum(Ⅵ)-tridentate schiff base complex, Catalyst, Epoxidation, Soybean oil, Reaction mechanism

CLC Number:

O643.3

TrendMD:

ZHANG Shu-Yuan, JIANG Ping-Ping, LENG Yan, XU Yu-Cheng, MO Guan-Tian, BIAN Gang. Synthesis of cis-Dioxomolybdenum(Ⅵ)-tridentate Schiff Base Complexes and Its Catalytic Activity on the Epoxidation of Soybean Oil[J]. Chem. J. Chinese Universities, 2013, 34(7): 1703.

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Synthesis of cis-Dioxomolybdenum(Ⅵ)-tridentate Schiff Base Complexes and Its Catalytic Activity on the Epoxidation of Soybean Oil

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