EP 4217110 A1 20230802 - PURIFICATION METHOD WITH RECYCLING OF EFFLUENTS
Title (en)
PURIFICATION METHOD WITH RECYCLING OF EFFLUENTS
Title (de)
REINIGUNGSVERFAHREN MIT ABWASSERRÜCKFÜHRUNG
Title (fr)
PROCEDE DE PURIFICATION AVEC RECYCLAGE DES EFFLUENTS
Publication
Application
Priority
- FR 2009748 A 20200924
- FR 2021051644 W 20210924
Abstract (en)
[origin: WO2022064154A1] The invention relates to a purification method, comprising the following steps: - supplying a stream (6) comprising a non-ionised species, monovalent cations and divalent cations; - bringing the stream (6) into contact with a first cation exchange resin (1) in sodium and/or potassium form; - collecting a first fraction (7) which contains the non-ionised species and is enriched in monovalent cations and depleted of divalent cations with respect to the stream (6); - bringing the first fraction (7) into contact with a second cation exchange resin (2) in hydronium form; - collecting a second fraction (8) which contains the non-ionised species and is depleted of monovalent cations with respect to the first fraction (7); - regenerating the second cation exchange resin (2) with a sulphuric acid solution (10); - collecting a first regeneration effluent comprising at least one fraction A, the fraction A comprising sodium and/or potassium ions; and - recycling the fraction A to regenerate the first cation exchange resin (1).
IPC 8 full level
B01J 39/04 (2017.01); B01J 41/04 (2017.01); B01J 47/026 (2017.01); B01J 49/53 (2017.01); B01J 49/57 (2017.01)
CPC (source: EP US)
A23L 2/04 (2013.01 - US); A23L 2/78 (2013.01 - US); B01J 39/04 (2013.01 - EP); B01J 39/20 (2013.01 - US); B01J 41/04 (2013.01 - EP); B01J 41/14 (2013.01 - US); B01J 47/026 (2013.01 - EP); B01J 49/53 (2017.01 - EP US); B01J 49/57 (2017.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
FR 3114252 A1 20220325; FR 3114252 B1 20230630; CN 116322998 A 20230623; EP 4217110 A1 20230802; US 2023371556 A1 20231123; WO 2022064154 A1 20220331
DOCDB simple family (application)
FR 2009748 A 20200924; CN 202180070293 A 20210924; EP 21798415 A 20210924; FR 2021051644 W 20210924; US 202118028197 A 20210924