Calcite control in an in situ leach operation

Details Calcite control in an in situ leach operation Calcite control in an in situ leach operation

E - Fixed Constructions

21

B

31/28, 166/30

E21B 43/28 (2006.01) C09K 8/54 (2006.01) E21B 41/02 (2006.01)

Patent

CA 1078599

CALCITE CONTROL IN AN IN SITU LEACH OPERATION Abstract of the Disclosure A method of controlling calcite in an in situ leaching operation by retarding the growth of calcite crystals in the lixiviant only for the resident time that the lixiviant is in a critical area of the leach circuit and then allowing the calcite to precipitate from the lixiviant in a noncritical area. A chemical inhibitor, e.g., sodium hexamethaphosphate, is added to the lixiviant as the lixiviant enters a critical area, e.g., from the bottom of a production well to surface processing equipment. The inhibitor is added to the lixiviant in an amount sufficient only to retard calcite precipitation while the lixiviant moves through a critical area but not to seriously impede calcite precipitation after the lixiviant exits the critical area. -1-

288960

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