Solution mining of trona or nahcolite ore with aqueous NaOH and

Details Solution mining of trona or nahcolite ore with aqueous NaOH and Solution mining of trona or nahcolite ore with aqueous NaOH and

1983-08-15

1985-02-12

Novosad, Stephen J.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Dissolving or chemical reaction

423206T, 23302T, E21C 4108, E21B 4328

Patent

active

044987064

ABSTRACT:
Separate deposits of trona or nahcolite ore are solution mined with two solvents, aqueous sodium hydroxide and aqueous hydrogen chloride. Aqueous sodium carbonate solution is withdrawn from the region of the NaOH-treated ore deposit, for recovery of soda ash. Aqueous sodium chloride brine is withdrawn from the region of the HCl-treated ore deposit and introduced to an electrodialysis cell to regenerate the two solvents and thereby continue the solution mining cycle.

REFERENCES:
patent: 3184287 (1965-05-01), Gancy
patent: 3953073 (1976-04-01), Kube
patent: 4219396 (1980-08-01), Gancy et al.
patent: 4238305 (1980-12-01), Gancy et al.
patent: 4391680 (1983-07-01), Mani et al.

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