EP 3924537 B1 20240703 - MULTILAYER CATION EXCHANGE CHLORALKALI MEMBRANE
Title (en)
MULTILAYER CATION EXCHANGE CHLORALKALI MEMBRANE
Title (de)
MEHRSCHICHTIGE CHLORALKALIMEMBRAN FÜR KATIONENAUSTAUSCH
Title (fr)
MEMBRANE DE CHLORALCALI À ÉCHANGE CATIONIQUE MULTICOUCHE
Publication
Application
Priority
- US 201962805333 P 20190214
- US 2020018024 W 20200213
Abstract (en)
[origin: WO2020168023A1] A multilayer cation exchange membrane for use in a chloralkali process comprising an carboxylate layer comprising a fluorinated ionomer containing carboxylate groups on one side of the membrane, an exterior sulfonate layer comprising a fluorinated ionomer containing sulfonate groups on the side of the membrane opposite the carboxylate layer, and an interior sulfonate layer comprising a fluorinated ionomer containing sulfonate groups between the carboxylate layer and the exterior sulfonate layer, the exterior sulfonate layer having an ion exchange ratio greater than about 11.3, and the interior sulfonate layer having an ion exchange ratio less than about 11.
IPC 8 full level
C25B 9/19 (2021.01); C25B 1/46 (2006.01); C25B 13/08 (2006.01)
CPC (source: EP KR US)
C25B 1/46 (2013.01 - EP KR US); C25B 9/19 (2021.01 - EP KR); C25B 13/02 (2013.01 - KR US); C25B 13/08 (2013.01 - EP KR 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
DOCDB simple family (publication)
WO 2020168023 A1 20200820; CN 113423870 A 20210921; CN 113423870 B 20240607; EP 3924537 A1 20211222; EP 3924537 B1 20240703; JP 2022520413 A 20220330; KR 20210124420 A 20211014; US 2022136118 A1 20220505
DOCDB simple family (application)
US 2020018024 W 20200213; CN 202080014417 A 20200213; EP 20713433 A 20200213; JP 2021547255 A 20200213; KR 20217028814 A 20200213; US 202017426794 A 20200213