Title: Buffer-free process cycle for CO₂ sequestration and carbonate production from brine waste streams with high salinity

Abstract

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.

Inventors:

Sant, Gaurav; Wei, Zongsu; Wang, Bu; La Plante, Erika Callagon; Simonetti, Dante

Issue Date:

2023-11-28

Research Org.:

Univ. of California, Oakland, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

2293909

Patent Number(s):

11827542

Application Number:

17/888,074

Assignee:

The Regents of the University of California (Oakland, CA)

Patent Classifications (CPCs):

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01D - COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS

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C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01D - COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM

C01D7/12 - Preparation of carbonates from bicarbonates {or bicarbonate-containing product}
C01D7/16 - Preparation from compounds of sodium or potassium with amines and carbon dioxide

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS

C01F11/005 - {Preparation involving liquid-liquid extraction, absorption or ion-exchange}
C01F11/18 - Carbonates
C01F5/24 - Magnesium carbonates

C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

C02F1/265 - {Desalination}
C02F1/42 - by ion-exchange
C02F1/441 - {by reverse osmosis}
C02F1/442 - {by nanofiltration}
C02F1/444 - {by ultrafiltration or microfiltration}
C02F1/52 - by flocculation or precipitation of suspended impurities {
C02F1/66 - by neutralisation
C02F1/68 - by addition of specified substances, e.g. trace elements, for ameliorating potable water
C02F1/683 - {by addition of complex-forming compounds}
C02F2001/425 - {using cation exchangers}
C02F2103/08 - Seawater, e.g. for desalination
C02F2103/10 - from quarries or from mining activities
C02F2303/16 - Regeneration of sorbents, filters
C02F2305/00 - Use of specific compounds during water treatment
C02F9/00 - Multistage treatment of water, waste water, or sewage

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DOE Contract Number:  

FE0029825; FE0031705

Resource Type:

Patent

Resource Relation:

Patent File Date: 08/15/2022

Country of Publication:

United States

Language:

English