US 12,421,142 B2
Method of sulfate removal from seawater using high salinity produced water
Fahd Ibrahim Alghunaimi, Dhahran (SA); Tao Chen, Dhahran (SA); Mohammed Abudullah Bataweel, Dhahran (SA); and Hind Saleh Aldossary, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Apr. 18, 2022, as Appl. No. 17/722,815.
Prior Publication US 2023/0331599 A1, Oct. 19, 2023
Int. Cl. C02F 1/52 (2023.01); C02F 101/10 (2006.01); C02F 103/08 (2006.01); C02F 103/10 (2006.01)
CPC C02F 1/5236 (2013.01) [C02F 1/5209 (2013.01); C02F 2101/101 (2013.01); C02F 2103/08 (2013.01); C02F 2103/10 (2013.01); C02F 2209/001 (2013.01); C02F 2209/05 (2013.01); C02F 2209/19 (2013.01); C02F 2301/08 (2013.01); C02F 2303/22 (2013.01); C02F 2305/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of desulfating seawater, the method comprising:
adding an amount of a produced water to an amount of a sulfated seawater to form a first precipitating solution;
agitating the first precipitating solution thereby forming a first precipitate;
separating the first precipitate from the first precipitating solution to produce a desulfated seawater having a first concentration of sulfate ions;
measuring the first sulfate ion concentration of the desulfated seawater;
adding a precipitating agent to the desulfated seawater to form a second precipitating solution comprising a second precipitate; and
separating the second precipitate from the second precipitating solution to produce a desulfated seawater having a second concentration of sulfate ions.