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    1.
    发明专利
    未知

    公开(公告)号：DE1239282B

    公开(公告)日：1967-04-27

    申请号：DES0082325

    申请日：1962-11-05

    Applicant: SNIA VISCOSA

    Inventor： NOTARBARTOLO LUIGI ,  MORBIDELLI GIUSEPPE

    IPC: B01J23/94 ,  B01J27/06 ,  B01J31/40 ,  B01J39/02 ,  C07C51/265 ,  C07C51/47 ,  C07C63/06

    Abstract: Cobalt containing catalysts are recovered from liquors containing cobalt benzoate by interaction with a cation exchange resin at 10-90 DEG C., treating the resin with strong acid, dividing the solution issuing from the resin into head and tail fractions containing cobalt, intermediate fractions having less than 5% of cobalt salt and central fractions having 5-10% cobalt salt and recovering the cobalt from the central fractions. The starting liquor may be boiled with activated charcoal or a diatomaceous earth before interaction with the resin. The resin may contain carboxyl or sulphuric acid groups and may be in the form of a column. Benzoic acid may be recovered from the treated starting liquor, e.g. by adding it to the product of the main oxidation reaction. The cobalt impregnated resin may be washed with water at 70-80 DEG C. prior to acid treatment and the washings added to the treated starting liquor for benzoic acid recovery. Suitably acid elements are HCl, H2SO4 and any acid stronger than the resin. The head and tail fractions are discarded and the intermediate fractions are used, with the addition of strong acid for regeneration of the resin with hydrogen ions in subsequent experiments. The central fractions may be treated with an alkali metal salt of an organic acid to give a desired cobalt salt for catalysis.

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