	US 11,987,510 B2
	Production of H2S for efficient metal removal from effluents
Dania Valenzuela, Tucson, AZ (US)
Assigned to 1983 LLC, Tucson, AZ (US)
Filed by 1983 LLC, Tucson, AZ (US)
Filed on Apr. 23, 2021, as Appl. No. 17/302,101.
Claims priority of provisional application 63/081,585, filed on Sep. 22, 2020.
Claims priority of provisional application 63/014,947, filed on Apr. 24, 2020.
Prior Publication US 2021/0331952 A1, Oct. 28, 2021
Int. Cl. C02F 1/62 (2023.01); C01B 17/16 (2006.01); C01B 32/50 (2017.01); C02F 1/52 (2023.01); C02F 1/66 (2023.01); C02F 1/68 (2023.01); C02F 1/58 (2023.01); C02F 101/20 (2006.01); C02F 103/10 (2006.01)

CPC C02F 1/62 (2013.01) [C01B 17/165 (2013.01); C01B 32/50 (2017.08); C02F 1/5236 (2013.01); C02F 1/66 (2013.01); C02F 1/685 (2013.01); C02F 1/58 (2013.01); C02F 2101/20 (2013.01); C02F 2101/203 (2013.01); C02F 2103/10 (2013.01); C02F 2305/00 (2013.01)]

22 Claims

1. A method to extract metals in a liquid stream containing at least one metal, comprising the steps of:

flowing gaseous hydrogen sulfide (H₂S) into a mixing apparatus containing the liquid stream; wherein

the gaseous hydrogen sulfide and the liquid stream are mixed under conditions sufficient to extract the at least one metal, and wherein a make-up stream of Na₂SO₄is combined with a Na₂SO₄liquor recycle stream and directed into a Na₂SO₄concentrator to extract water to thereby increase a Na₂SO₄concentration, and the concentrated Na₂SO₄is then directed through a pump into a Na₂SO₄/Na₂S converter and natural gas flows in conjunction with the Na₂SO₄.