Solution mining water soluble salts at high temperatures
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United States of America Patent
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-
Nov 11, 1980
Grant Date -
N/A
app pub date -
Feb 9, 1979
filing date -
Feb 9, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Subterranean formations of water soluble salt deposits are solution mined by introducing into the formation an aqueous solvent having a temperature substantially above the temperature of the deposit thereby heating the deposit and dissolving the soluble salts, and withdrawing from the deposit an aqueous solution enriched in the dissolved salts. An aqueous solvent having a temperature lower than the temperature of the first solvent is subsequently introduced into the deposit thereby recapturing heat given up to the deposit and dissolving the soluble salt utilizing greater solubility characteristics of the soluble salts owing to the increased deposit temperature, and withdrawing from the deposit a substantially increased amount of dissolved salt.
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