期刊
TOPICS IN CATALYSIS
卷 53, 期 15-18, 页码 1126-1131出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-010-9545-1
关键词
Selective hydrogenation; Nitrobenzene; Aniline; 1-Chloro-2-nitrobenzene; 2-Chloroaniline; Hyroxylamine; Precious metal powder catalyst; Platinum; Vanadium; Activated carbon
资金
- Evonik Degussa GmbH
The development of new improved catalysts for the selective hydrogenation of aromatic nitrogroups is still a field of high interest for the chemical industry. Hydrogenation of aromatic nitrogroups to the corresponding aromatic amines is one of the most important applications for precious metal powder catalysts (PMPC). In this paper various commercial PMPC technologies such as palladium, platinum, platinum modified with copper and platinum modified with vanadium on activated carbon powder supports were compared to each other in regard to activity and selectivity for hydrogenation of 1-chloro-2-nitrobenzene. In this reaction, catalysts comprised of vanadium modified platinum on activated carbon showed excellent activities and selectivities towards 2-chloroaniline. Catalyst performance was affected by the ratio of platinum to vanadium and the properties of the carbon. The role of vanadium as an effective modifier to avoid accumulation of hazardous aromatic hydroxylamines was explained.
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