US EPA

8698160 

Journal Article 

Diamino-functionalized mesoporous molecular sieve anchoring V(IV) and Mo(VI) complexes as catalyst for alkene epoxidation 

Yang, H; Zhang, G; Hong, X; Zhu, Y 

2004 

1 

Indian Journal of Chemistry. Section A
ISSN: 0376-4710
EISSN: 0975-0975 

43 

5 

1083-1087 

English 

The novel hybrid catalysts have been prepared by anchoring homogeneous catalysts VO(acac)2 and MoO2(acac)2 onto the diamino-functionalized mesoporous molecular HMS achieved by silylation of mesoporous sieve HMS with 3-[(2-aminoethyl)-amino]-propyldimethoxymethylsilane. The developed hybrid catalysts demonstrate high activity as their homogeneous counterparts for cyclohexene epoxidation with t-butyl hydroperoxide as oxidant. The yield of cyclohexene oxide is found to be 74.2% for the catalyst NMS-AASP-Mo, and more than 80% of selectivity has been obtained for all the developed hybrid catalysts. The catalysts exhibit easy recovery, and the metal leaching is found to be less than 6% after two runs. The catalysts have been characterized with N2 physical adsorption, X-ray powder diffraction, FT-IR spectrum, DRUV-vis spectrum and ICP-AES.