	US 12,434,192 B2
	Method and system for extraction of minerals based on divalent cations from brine
Ahmed Saleh Mohammed Alamoudi, Al-Jubail (SA); Mohammed Farooque Ayumantakath, Al-Jubail (SA); Nikolay Voutchkov, Winter Springs, FL (US); Seungwon Ihm, Al-Khobar (SA); Christopher Michael Fellows, Al-Jubail (SA); and Eslam Alwaznani, Al-Jubail (SA)
Assigned to SAUDI WATER AUTHORITY, Riyadh (SA)
Filed by Saudi Water Authority, Riyadh (SA)
Filed on Aug. 30, 2023, as Appl. No. 18/458,741.
Application 18/458,741 is a continuation of application No. 17/644,121, filed on Dec. 14, 2021, granted, now 11,806,668.
Prior Publication US 2023/0405526 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C01F 5/34 (2006.01); B01D 9/00 (2006.01); B01D 9/02 (2006.01); B01D 61/02 (2006.01); C01F 11/46 (2006.01)

CPC B01D 61/026 (2022.08) [B01D 9/0059 (2013.01); B01D 9/02 (2013.01); C01F 5/34 (2013.01); C01F 11/468 (2013.01); B01D 2009/0086 (2013.01)]

20 Claims

1. A system for production of minerals from divalent ion-containing brine, comprising:

a first nanofiltration seawater reverse osmosis (NF-SWRO) membrane unit configured to receive a divalent-ion rich stream and to reject sulfate while allowing divalent ions to pass into a first permeate stream;

a first concentration unit configured to receive the first permeate stream and produce solid calcium sulfate dihydrate and a magnesium-rich brine stream;

a second concentration unit configured to receive and concentrate the magnesium-rich brine stream to a saturation point of sodium chloride; and

a first crystallizing unit configured to receive the concentrated magnesium-rich brine stream and produce solid sodium chloride and a supernatant product stream.