EP 0642602 A1 19950315 - METHOD FOR THE PREPARATION OF A MICROPOROUS DIAPHRAGM.
Title (en)
METHOD FOR THE PREPARATION OF A MICROPOROUS DIAPHRAGM.
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES MIKROPORÖSEN DIAPHRAGMA.
Title (fr)
PROCEDE DE PREPARATION DE DIAPHRAGME MICROPOREUX.
Publication
Application
Priority
- FR 9400342 W 19940328
- FR 9303486 A 19930326
Abstract (en)
[origin: WO9423093A1] Diaphragm for use in cells for the electrolysis of alkaline halide solutions comprising: 100 parts by weight of asbestos fibres, 30 to 70 parts by weight of silica-based derivatives and 20 to 60 parts by weight of fluorinated polymers, deposited on a porous material. The weight ratio of the fluorinated polymers and the silica-based derivatives is between 0.6 to 1.2 and preferably between 0.6 to 0.9 with the exception of a diaphragm obtained by depositing a suspension comprising 100 parts by dry weight of asbestos fibres, 30 parts by dry weight of silica-based derivatives, 25 parts by dry weight of fluorinated polymers and 1.5 parts by dry weight of a thickening agent. The invention also concerns a method for the preparation of an optionally microporous diaphragm. The diaphragms of the invention are especially useful in aqueous alkaline halide solutions electrolysis cells.
IPC 1-7
IPC 8 full level
C25D 13/04 (2006.01); C25B 13/04 (2006.01)
CPC (source: EP KR US)
C25B 11/031 (2021.01 - KR); C25B 13/04 (2013.01 - EP US); C25B 13/06 (2013.01 - KR); C25B 15/08 (2013.01 - KR)
Citation (search report)
See references of WO 9423093A1
Designated contracting state (EPC)
BE DE ES FR GB GR IT NL SE
DOCDB simple family (publication)
WO 9423093 A1 19941013; BG 61878 B1 19980831; BG 99292 A 19951229; CA 2136763 A1 19941013; CN 1106615 A 19950809; EP 0642602 A1 19950315; FR 2703075 A1 19940930; FR 2703075 B1 19950616; JP H08505189 A 19960604; KR 950701692 A 19950428; KR 970007100 B1 19970502; PL 306376 A1 19950320; RU 94046344 A 19961027; US 5547550 A 19960820
DOCDB simple family (application)
FR 9400342 W 19940328; BG 9929294 A 19941223; CA 2136763 A 19940328; CN 94190153 A 19940328; EP 94911227 A 19940328; FR 9303486 A 19930326; JP 52174494 A 19940328; KR 19940074275 A 19941126; KR 19940704275 A 19941126; PL 30637694 A 19940328; RU 94046344 A 19941223; US 34345094 A 19941215