中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

7 records (took 0.02 seconds)

    Production of magnetic iron oxide especially suitable for the production of magnetogram carriers
    1.
    发明专利
    Production of magnetic iron oxide especially suitable for the production of magnetogram carriers 未知

    公开(公告)号：GB890198A

    公开(公告)日：1962-02-28

    申请号：GB2935460

    申请日：1960-08-25

    Applicant: BASF AG

    Inventor： HUBERICH THEODOR ,  BERGMANN FRIEDRICH

    IPC: G11B5/706

    Abstract: Magnetic iron oxide suitable for magnetogram carriers is produced by oxidation of iron carbonyls with oxygen-containing compounds that react endothermically with the iron carbonyls. The oxidizing agent may be reacted with liquid or vaporous iron carbonyl in an amount such that the iron oxide formed has an atomic ratio of iron to oxygen greater than 3:4, and heat may be supplied during the oxidation. In examples, iron pentacarbonyl is reacted with steam, with acetone in hydrogen, with methylethylketone, with methanol, with formaldehyde, with carbon dioxide, and with tetraethyl silicate. Other oxidizing agents mentioned are ethanol, propanol, butanol, and acetaldehyde. The iron oxide may be oxidized to gamma ferric oxide.

Patent Agency Ranking