US 11,919,775 B2
CO 2 mineralization in produced and industrial effluent water by pH-swing carbonation
Gaurav N. Sant, Los Angeles, CA (US); Hyukmin Kweon, Los Angeles, CA (US); Erika Callagon La Plante, Los Angeles, CA (US); and Dante Adam Simonetti, Los Angeles, CA (US)
Assigned to The Regents of the University of California, Oakland, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US)
Filed on Dec. 15, 2021, as Appl. No. 17/552,194.
Application 17/552,194 is a continuation of application No. 16/627,238, granted, now 11,230,473, previously published as PCT/US2018/040373, filed on Jun. 29, 2018.
Claims priority of provisional application 62/527,622, filed on Jun. 30, 2017.
Prior Publication US 2022/0212935 A1, Jul. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C01B 32/60 (2017.01); B01D 53/14 (2006.01); B01D 53/62 (2006.01); B01D 53/78 (2006.01); C01F 11/18 (2006.01); C01D 7/00 (2006.01); E21B 43/20 (2006.01); F01K 17/04 (2006.01)
CPC C01B 32/60 (2017.08) [B01D 53/1475 (2013.01); B01D 53/62 (2013.01); B01D 53/78 (2013.01); C01F 11/183 (2013.01); C01F 11/188 (2013.01); B01D 2252/103 (2013.01); B01D 2252/60 (2013.01); B01D 2257/504 (2013.01); B01D 2258/0283 (2013.01); C01D 7/00 (2013.01); E21B 43/20 (2013.01); F01K 17/04 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method comprising:
combining effluent water with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution; and
controlling the pH of the reaction solution with a regenerable, heterogeneous pH buffer agent to induce precipitation of a carbonate salt from the reaction solution;
wherein the carbon dioxide-containing emission stream is a flue gas stream; and
the regenerable heterogeneous pH buffer agent is a polymer-supported buffer agent or a zeolite that supports cation exchange reactions.