ALPHA-TE2MOO7 AS AN ACTIVE SPECIES IN THE VAPOR-PHASE SELECTIVE OXIDATION OF ETHYL LACTATE TO PYRUVATE OVER TEO2-MOO3 CATALYSTS

被引：31

作者：

HAYASHI, H

SUGIYAMA, S

MASAOKA, N

SHIGEMOTO, N

机构：

[1] Department of Chemical Science and Technology, University of Tokushima, Minamijosanjima

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1995年 / 34卷 / 01期

关键词：

D O I：

10.1021/ie00040a011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Binary oxide, TeO2-MoO3, converted ethyl lactate selectively to-pyruvate in a vapor-phase fixed-bed flow system. A synergy in activity was observed for TeO2-MoO3 calcined at 500 degrees C, showing a sharp maximum at a composition of MoO3.2TeO2 and it is concluded with evidence from powder XRD, IR, DTA-TGA, and SEM/EPMA that alpha-Te2MoO7 is the active species for the present system. TeO2-MoO3 calcined at 400 degrees C was a mixture of the component oxides and crystallized at 450 degrees C to give alpha-Te2MoO7. Phase transition of the alpha-form to less active amorphous beta-Te2MoO7 was observed by calcination at 600 degrees C. An optimized catalyst with a composition of MoO3.2TeO(2) calcined at 500 degrees C in air revealed a high conversion of lactate over 99% with 93% selectivity to pyruvate at 300 degrees C.

引用

页码：135 / 139

页数：5

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