sequestration and carbonate production from brine waste streams with high salinity

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United States of America Patent

PATENT NO 11827542
APP PUB NO 20230058065A1
SERIAL NO

17888074

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Abstract

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A method includes: (1) using a chelating agent, extracting divalent ions from a brine solution as complexes of the chelating agent and the divalent ions; (2) using a weak acid, regenerating the chelating agent and producing a divalent ion salt solution; and (3) introducing carbon dioxide to the divalent ion salt solution to induce precipitation of the divalent ions as a carbonate salt. Another method includes: (1) combining water with carbon dioxide to produce a carbon dioxide solution; (2) introducing an ion exchanger to the carbon dioxide solution to induce exchange of alkali metal cations included in the ion exchanger with protons included in the carbon dioxide solution and to produce a bicarbonate salt solution of the alkali metal cations; and (3) introducing a brine solution to the bicarbonate salt solution to induce precipitation of divalent ions from the brine solution as a carbonate salt.

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Patent OwnerAddress
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA1111 FRANKLIN STREET 12TH FLOOR OAKLAND CA 94607

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
La, Plante Erika Callagon Los Angeles, US 8 34
Sant, Gaurav Los Angeles, US 27 95
Simonetti, Dante Los Angeles, US 15 41
Wang, Bu Los Angeles, US 13 47
Wei, Zongsu Los Angeles, US 6 28

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