US 11,987,506 B2
Salt recovery solution and processes of use thereof
Daryl Joseph Briggs, Auckland (NZ); and Chaitra Prakash, Auckland (NZ)
Assigned to Aquafortus Technologies Limited, Auckland (NZ)
Filed by Aquafortus Technologies Limited, Auckland (NZ)
Filed on Jan. 4, 2023, as Appl. No. 18/093,263.
Application 18/093,263 is a division of application No. 16/753,263, abandoned, previously published as PCT/NZ2018/050135, filed on Oct. 3, 2018.
Claims priority of provisional application 62/567,545, filed on Oct. 3, 2017.
Prior Publication US 2023/0257284 A1, Aug. 17, 2023
Int. Cl. B01D 9/00 (2006.01); C02F 1/26 (2023.01); C02F 9/00 (2023.01); C02F 101/10 (2006.01)
CPC C02F 1/265 (2013.01) [C02F 2101/10 (2013.01); C02F 2305/14 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A process for separating a salt from a first aqueous solution, the process comprising the steps of:
(a) adding the salt containing first aqueous solution to a salt recovery solution comprising:
(i) at least one tertiary amine containing compound; and
(ii) at least one enolisable carbonyl; and
(b) allowing the salt to precipitate on passage through the salt recovery solution wherein wherein the salt containing first aqueous solution is sea water or a brine; and wherein the at least one tertiary amine is selected from selected from:
(i) 1-ethylpyrrolidine, 2-methylpyridine, N-methylpiperidine, and 4-ethylmorpholine; or
(ii) a —N(C1-C4 alkyl)3 or
(iii) —N(C2 alkyl)3 (triethylamine); or
(iv) is selected from:

OG Complex Work Unit Chemistry