Solution mining of trona or nahcolite ore with electrodialytical

Details Solution mining of trona or nahcolite ore with electrodialytical Solution mining of trona or nahcolite ore with electrodialytical

1985-04-16

1987-03-24

Kaplan, G. L.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Dissolving or chemical reaction

2041825, 423206T, 423421, E21C 4108, E21B 4328

Patent

active

046520546

ABSTRACT:
A cyclic solution mining method that uses aqueous sodium hydroxide for recovering valuable alkali values, preferably as soda ash, from subterranean deposits of trona or nahcolite, even when such deposits are NaCl-contaminated. The aqueous sodium hydroxide mining solvent is generated via electrodialysis of a recirculating sodium chloride brine stream. Hydrogen chloride that is also generated in the cell's operation is neutralized with aqueous sodium carbonate, to regenerate sodium chloride brine that is recirculated to the electrodialysis cell as brine feed.

REFERENCES:
patent: 3184287 (1965-05-01), Gancy
patent: 3953073 (1976-04-01), Kube
patent: 4107015 (1978-08-01), Chlanda et al.
patent: 4116889 (1978-09-01), Chlanda et al.
patent: 4219396 (1980-08-01), Gancy et al.
patent: 4238305 (1980-12-01), Gancy et al.
patent: 4391680 (1983-07-01), Mani et al.
patent: 4498706 (1985-02-01), Ilardi et al.
patent: 4584077 (1986-04-01), Chlanda et al.

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