Selective recovery of manganese and zinc from geothermal brines
AssigneeSimbol Inc.
InventorsStephen Harrison, Samaresh Mohanta
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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.
Claims21
A method for recovering zinc and manganese from a brine, the method comprising the steps of:
- providing a brine, said brine comprising manganese and zinc;
- selectively removing silica and iron from the 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;
- separating the zinc and manganese precipitates from the brine.
A method for recovering zinc and manganese from a brine, the method comprising the steps of:
- providing a brine, said brine comprising manganese and zinc;
- selectively removing silica and iron from the 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;
- separating the zinc and manganese precipitates from the brine;
- dissolving the precipitates of zinc and manganese to produce a zinc manganese solution;
- oxidizing the manganese to form a manganese precipitate and a zinc solution;
- separating the manganese precipitate from the zinc solution;
- recovering the zinc by electrochemical means.
A method for recovering zinc and manganese from a brine, the method comprising the steps of:
- providing a brine, said brine comprising manganese and zinc;
- selectively removing silica and iron from the 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;
- oxidizing the manganese to produce a manganese dioxide precipitate;
- and
- recovering the magnesium dioxide precipitate.
A method for recovering zinc and manganese from a brine, the method comprising the steps of:
- providing a brine, said brine comprising manganese and zinc;
- selectively removing silica and iron from the brine to produce a substantially silica free brine that comprises manganese and zinc;
- extracting manganese and zinc from the substantially silica free brine to produce a manganese zinc solution;
- electrochemically removing manganese from the manganese zinc solution to produce a residual solution that includes zinc;
- and
- electrochemically removing zinc from the residual solution.
A method for recovering zinc and manganese from a brine, the method comprising the steps of:
- providing a brine, said geothermal brine comprising manganese and zinc;
- selectively removing silica and iron from the 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.