Solution mining water soluble salts at high temperatures
Patent 4232902 Issued on November 11, 1980. Estimated Expiration Date: 
February 9, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 9, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2161800 3050290 3148000 3278234 3284137 3294167 3348883 Method for producing geothermal energy and minerals Patent #: 4074754 InventorAssigneeApplicationNo. 06/010563 filed on 02/09/1979US Classes:299/4, Input and output wells299/5Dissolving or chemical reactionExaminersPrimary: Pate, III, William F.Attorney, Agent or FirmInternational ClassesE21B 43/00 (20060101)E21B 43/30 (20060101) E21B 43/28 (20060101) AbstractSubterranean 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. | |
