Method for recycling spent lithium metal polymer...

Details Method for recycling spent lithium metal polymer... Method for recycling spent lithium metal polymer...

2007-03-20

2007-03-20

Vanoy, Timothy C. (Department: 1754)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vb metal

C423S068000, C423S111000, C423S179500, C423S209000, C429S049000, C075S638000, C075S671000, C075S690000, C075S693000

Reexamination Certificate

active

10129112

ABSTRACT:
The method relates to a pyrometallurgical and hydrometallurgical process for the recovery and recycling of lithium and vanadium compounds from a material comprising spent rechargeable lithium batteries, particularly lithium metal gel and solid polymer electrolyte rechargeable batteries. The method involves providing a mass of the material, hardening it by cooling at a temperature below room temperature, comminuting the mass of cooled and hardened material, digesting with an acid its ashes obtained by incineration, or its solidified salts obtained by molten salt oxidation, or the comminuted mass itself, to give a mother liquor, extracting vanadium compounds from the mother liquor, separating heavy metals and aluminium therefrom, and precipitating lithium carbonate from the remaining solution.

REFERENCES:
patent: 5352270 (1994-10-01), Shackle
patent: 5888463 (1999-03-01), McLaughlin et al.
patent: 6261712 (2001-07-01), Hayashi et al.
patent: 6686086 (2004-02-01), Martin et al.
patent: 2005/0244704 (2005-11-01), Sloop et al.
Z. Pingwei et al. ; “Hydrometallurgical process for recovery of metal values from spent lithium-ion secondary batteries” HYDROMETTALURGY, vol. 47, No. 2-3, pp. 259-271 1998.

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