US 12,290,767 B2
Apparatus and method for concentrating corrosive liquids
Fabien Perez, Cornier (FR); and Andreas Wilk, Basel (CH)
Assigned to Andreas Wilk, Lorrach (DE)
Appl. No. 18/032,346
Filed by Andreas Wilk, Lorrach (DE)
PCT Filed Nov. 4, 2021, PCT No. PCT/EP2021/080641
§ 371(c)(1), (2) Date Apr. 18, 2023,
PCT Pub. No. WO2022/117275, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 10 2020 131 827.8 (DE), filed on Dec. 1, 2020.
Prior Publication US 2023/0390667 A1, Dec. 7, 2023
Int. Cl. B01D 3/00 (2006.01); B01D 1/00 (2006.01); C01B 17/88 (2006.01)
CPC B01D 3/007 (2013.01) [C01B 17/88 (2013.01); B01D 1/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An apparatus for a continuous concentration of corrosive liquids, the apparatus comprising a fluid system with an inlet for a dilute corrosive liquid, the fluid system comprising, downstream of the inlet and in serial arrangement, a regenerative heat exchanger for preheating the dilute corrosive liquid, a main heat exchanger or heating element for further heating preheated dilute corrosive liquid, and a main separator for separating solvent vapour from heated dilute corrosive liquid from the main heat exchanger or heating element, wherein
the fluid system further comprises
a vapour line to supply solvent vapour, which has been separated from the heated dilute corrosive liquid in the main separator, to a hot side of the regenerative heat exchanger as a heat source,
an auxiliary separator connected downstream to the hot side of the regenerative heat exchanger, such that the auxiliary separator receives condensed liquid and cooled solvent vapour from the regenerative heat exchanger, the auxiliary separator configured for separation of the condensed liquid from the cooled solvent vapour, and
a reflux line to supply condensed liquid, which has been separated from the cooled solvent vapour in the auxiliary separator, to the dilute corrosive liquid.