Selective recovery of manganese, lead and zinc
AssigneeSimbol Inc.
InventorsStephen Harrison, Samaresh Mohanta, C.V. Krishnamohan Sharma, Elizabeth Geler
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Abstract
This invention relates to a method for the selective recovery of manganese and zinc from geothermal brines that includes the steps of removing silica and iron from the brine, oxidizing the manganese and zinc to form precipitates thereof, recovering the manganese and zinc precipitates, solubilizing the manganese and zinc precipitates, purifying the manganese and zinc, and forming a manganese precipitate, and recovering the zinc by electrochemical means.
Claims20
A method for recovering zinc and manganese from a geothermal brine, the method comprising the steps of:
- providing a geothermal brine, said geothermal brine comprising manganese and zinc;
- selectively removing silica and iron from the geothermal brine to produce a substantially silica free brine;
- adjusting the pH of the substantially silica free brine to a pH suitable to form precipitates of zinc and manganese, such that precipitates of zinc and manganese are selectively formed and other metal precipitates are not formed;
- and
- separating the zinc and manganese precipitates from the brine.
A method for recovering zinc and manganese from a geothermal brine, the method comprising the steps of:
- providing a geothermal brine, said geothermal brine comprising manganese and zinc;
- selectively removing silica and iron from the geothermal brine to produce a substantially silica and iron free brine that comprises manganese and zinc;
- adding a basic solution containing an amine or ammonia up to about pH 8 to 9 to selectively precipitate manganese from the brine;
- producing a manganese precipitate with less than 0.15% Zn and 4% Ca and 4% Mg;
- and
- recovering the precipitate.
A method for recovering zinc and manganese from a geothermal brine, the method comprising the steps of:
- providing a geothermal brine, said geothermal brine comprising manganese and zinc;
- selectively removing silica and iron from the geothermal brine to produce a substantially silica free brine that includes manganese and zinc;
- removing the zinc from the substantially silica free brine;
- extracting manganese from the substantially silica free brine.
Dependencies are inferred from the claim text.