Title: Oxalic acid leaching of marine nodules

Abstract: Metal values of ferromanganese nodules harvested from ocean floors are placed in aqueous solution suitable for partition as by selective extraction with chelating agents by treating the nodules with aqueous solutions which contain oxalic acid or mixture of oxalic acid with a strong acid. These unique reagents may be used alone or in combination with other reducing, complexing or acidic treating agents.

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Inventors: Zeitlin, Harry (Honolulu, HI, US)
Fernando, Quintus (Tucson, AZ, US)

Application Number: 102490
Filing Date: 1979-12-11
Publication_date: 1981-03-31
Assignee: University Patents, Inc. (Norwalk, CT)
Primary Class(es): 423/24 423/27, 423/49, 423/139, 423/150.4
Other Classes:
US Patent Ref:

3511645	May, 1970	Goni	75/121.
3853618	Dec, 1974	Smith	423/24.
3923615	Dec, 1975	Kane et al.	423/49.
4029733	Jun, 1977	Faugeras	423/150.

Other Refs: 620576

Apr, 1927	FR

Other References: Agarwol et al. "Processing of Ocean Nodules: A Technical and Economic Review", Journal of Mines, vol. 28, No. 4, Apr. 1976. _