Studies on the Silk-platinum Catalyst. I. Its Preparation and Activity

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概要

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• 1. A silk-platinum chelate, which had the highest platinum content, involving both the total platinum content and the coordinated platinum, was obtained when 400 mg. of silk-fibroin was boiled with 20 ml. of a 0.75% aqueous solution of potassium tetrachloroplatinate for 14 to 20 min.<BR>2. The most active silk-platinum catalyst was obtained when reduction of the chelate was pepeated twice in 1% acetic acid with 90 kg./cm<SUP>2</SUP> of hydrogen at 160°C. The activity was much influenced by the solvent, temperature and time used for its activation.<BR>3. The catalyst could be stored for a long period in the dry state and even showed some increase in activity during storage.<BR>4. The most active catalyst had about two hundred and fifty times as much activity as that of a platinic oxide catalyst in the hydro-genation of nitrobenzene to aniline.<BR>5. The characteristic structure of the carrier seems to exert some steric hindrance on the hydrogenation of highly branched aromatic nitro compounds.

• 公益社団法人 日本化学会の論文

著者

• Akabori Shiro

  Division of Organic Chemistry Institute for Protein Research Osaka University

関連論文

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• Studies on Modified Hydrogenation Catalyst. I. Selective Hydrogenation Activity of Modified Raney Nickel Catalyst for Carbonyl Group and C=C Double Bond
• Studies on the Silk-platinum Catalyst. II. General Properties
• Studies on the Silk-platinum Catalyst. I. Its Preparation and Activity

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