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OXYDEHYDROGENATION OF ISOBUTYRIC ACID WITH HETEROPOLYACID CATALYSTS - EXPERIMENTAL-OBSERVATIONS OF DEACTIVATION
被引:67
作者
:
WATZENBERGER, O
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV ERLANGEN NURNBERG,INST TECH CHEM 1,W-8520 ERLANGEN,GERMANY
WATZENBERGER, O
EMIG, G
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV ERLANGEN NURNBERG,INST TECH CHEM 1,W-8520 ERLANGEN,GERMANY
EMIG, G
LYNCH, DT
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV ERLANGEN NURNBERG,INST TECH CHEM 1,W-8520 ERLANGEN,GERMANY
LYNCH, DT
机构
:
[1]
UNIV ERLANGEN NURNBERG,INST TECH CHEM 1,W-8520 ERLANGEN,GERMANY
[2]
UNIV ALBERTA,DEPT CHEM ENGN,EDMONTON T6G 2G6,ALBERTA,CANADA
来源
:
JOURNAL OF CATALYSIS
|
1990年
/ 124卷
/ 01期
关键词
:
D O I
:
10.1016/0021-9517(90)90120-9
中图分类号
:
O64 [物理化学(理论化学)、化学物理学];
学科分类号
:
070304 ;
081704 ;
摘要
:
the heteropolyacid catalysts H5Mo10V2PO40 and H6Mo9V3PO40 have been used for producing methacrylic acid via the oxydehydrogenation of isobutyric acid. This reaction proceeds via a redox process involving lattice oxygen from the Keggin structure of the catalyst molecules. Changes in the oxidation state of the catalyst produce a deactivation effect which is reversible by fully reoxidizing the catalyst. An irreversible, long-term type of deactivation related to a loss of molybdenum from the catalyst has also been observed. This occurs through the formation of a volatile Mocontaining gas-phase species. Passage of the IBA feed over a bed of molybdenum trioxide prior to entering the reactor eliminates both types of deactivation. © 1990.
引用
收藏
页码:247 / 258
页数:12
相关论文
共 22 条
[21]
1982, Patent No. 3152364
[22]
1988, Patent No. 3311521
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共 22 条
[21]
1982, Patent No. 3152364
[22]
1988, Patent No. 3311521
←
1
2
3
→