Colloidal Palladium Supported on Chelate Resin Containing Iminodiacetic Acid Groups as Hydrogenation Catalyst
作者:
Hidefumi Hirai,
Shigeru Komatsuzaki,
Naoki Toshima,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1986)
卷期:
Volume 23,
issue 8
页码: 933-954
ISSN:0022-233X
年代: 1986
DOI:10.1080/00222338608081102
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Colloidal palladium supported on a chelate resin containing iminodiacetic acid groups was prepared by refluxing the palladium chelate resin in methanol-water. Using the resin-supported colloidal palladium as a catalyst, cyclopentadiene was hydrogenated to cyclopentene in 97.1% selectivity at 100% conversion of cyclopentadiene under 1 atm of hydrogen in methanol at 30°C. Finely dispersed metal particles ranging from 10 to 60 Å in diameter were observed in the resin by electron microscopy. Both x-ray microanalysis for palladium and elution analysis of palladium ion with an aqueous solution of ethylenediaminetetraacetic acid disodium salt demonstrated the existence of large amounts of palladium ion complexes in the resin. The amount of palladium metal in the resin was estimated to be about 5% of the total palladium. Since the resin, after removal of most of the ionic palladium, exhibited almost the same catalytic activity as before, it was concluded that the finely dispersed metal particles are the active species in the catalyst.
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