Back to results
US 11,078,557 B2Granted
Systems and methods for alkaline earth production
AssigneeLixivia, Inc.
InventorsMichael D. Wyrsta, Zachary J. A. Komon
Life of this patent
Estimating the term…
Abstract
Hydrometallurgical systems, methods, and compositions are described in which amine-based lixiviants are utilized in substoichiometric amounts to recover alkaline earths from raw or waste materials. The lixiviant can be regenerated and recycled for use in subsequent iterations of the process or returned to a reactor in a continuous process. Extraction of the alkaline earth from the raw material and precipitation of the extracted alkaline earth is performed in the same reactor and essentially simultaneously.
Claims13
A method for the recovery of an alkaline earth from a particulate raw material comprising;
- providing the particulate raw material in the form of a mud or slurry in a reactor, wherein the particulate raw material comprises an alkaline earth;
- in the same reactor, exposing the raw material to a
- source of carbon dioxide at ambient temperature and pressure, thereby generating a first reaction mixture;
- during contact with the source of carbon dioxide, monitoring pH of the first reaction mixture;
- discontinuing contact with the source of carbon dioxide when pH of the first reaction mixture becomes less than 8;
- monitoring pH of the first reaction mixture following discontinuation of contact with the source of carbon dioxide;
- re-establishing contact with the source of carbon dioxide at ambient temperature and pressure when pH of the first reaction mixture exceeds 8 to generate a second reaction mixture comprising an alkaline earth precipitate, and an extracted raw material;
- and
- separating the alkaline earth precipitate from the extracted raw material,
- wherein the method is performed in the absence of an added lixiviant.
7 more elements
Dependencies are inferred from the claim text.