1
William E Showalter: Process for recovery of mineral values from underground formations. Union Oil Company of California, Richard C Hartman, Dean Sandford, Daniel R Farrell, August 8, 1978: US04105253 (27 worldwide citation)

Carbon dioxide is admixed with water to form a carbonic acid solution for use as a leaching solution for extraction of uranium by solution mining. An oxidizing agent is also present in the solution.


2
Showalter William E: Procede dextraction de mineraux utiles dans des formations souterraines, Process for recovery of mineral values from underground formations. Union Oil Company Of California, FETHERSTONHAUGH & CO, March 24, 1981: CA1098029

"ABSTRACT OF THE DISCLOSURE" Carbon dioxide is admixed with water to form a carbonic acid solution for use as a leaching solution for extraction of uranium by solution mining. An oxidizing agent is also present in the solution.