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US 2016/0257580 A1Published application
Amelioration of acid mine drainage
AssigneeLanxess Sybron Chemicals Inc.
InventorsPhilip W. FATULA, Anthony P. TIRIO, Lillianne FALCO, Wilwood MATTHEWS
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Abstract
A process for the amelioration of acid mine drainage useful in shale hydrolyic fracturing operations for the production of natural gas involving the exchange of sulfate and chloride ions by an ion exchange resin so as to produce hydrochloric acid and water for use in hydrolyic fracturing operations from acid mine drainage.
Claims12
A process for treating acid mine drainage, comprising:
- contacting, in one or more contacting vessels, an anion exchange resin in chloride form with acid mine drainage solution containing hydrogen sulfate for exchange of sulfate ions and chloride ions to form an anion exchange resin in sulfate form and an effluent comprising hydrogen chloride,
- contacting, in the one or more contacting vessels, the anion exchange resin in sulfate form with a salt solution of a neutral chloride salt for exchange of sulfate ions and chloride ions to form a regenerated anion exchange resin in chloride form and an eluate comprising sodium sulfate, and
- depositing at least a portion of the effluent comprising hydrogen chloride underground.
Dependencies are inferred from the claim text.