Hydrometallurgical process using multi-stage nanofiltration
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United States of America Patent
Stats
-
Jan 8, 2019
Grant Date -
Sep 3, 2015
app pub date -
Aug 14, 2013
filing date -
Aug 23, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Nanofiltration can be used to improve a hydrometallurgical process in which valuable metal is extracted from ore or tailings by leaching with a suitable lixiviant. The process requires at least two nanofiltration subsystems in which raffinate from a solvent extraction process is treated in a nanofiltration subsystem, after which permeate therefrom is combined with a pregnant solution stream and is treated in a second nanofiltration subsystem. This arrangement can lead to advantages in the amount of lixiviant recovered, in the raw materials required, in the effluent produced, in the size of plant, and in overall cost.
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International Classification(s)
- 2013 Application Filing Year
- C22B Class
- 312 Applications Filed
- 280 Patents Issued To-Date
- 89.75 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C22B Class
- 0 % this patent is cited more than
- 6 Age
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