EP 0048617 A1 19820331 - Improved dimensionally stable asbestos-polytetrafluoroethylene diaphragms for chlor-alkali electrolytic cells.
Title (en)
Improved dimensionally stable asbestos-polytetrafluoroethylene diaphragms for chlor-alkali electrolytic cells.
Title (de)
Dimensionsstabile Asbest-Polytetrafluoräthylen-Diaphragmen für Chloralkalielektrolysezellen.
Title (fr)
Diaphragmes en amiante-polytétrafluoroéthylène dimensionnellement stables pour cellules d'électrolyse chloroalcaline.
Publication
Application
Priority
US 18903680 A 19800922
Abstract (en)
In making diaphragms and diaphragm-coated electrodes for electrolytic cells, such as those used for the electrolysis of brine to produce chlorine and caustic soda or caustic potash, by depositing a slurry of asbestos fibres and polytetrafluoroethylene on a substrate and heating to dry the resultant mat and fuse the polytetrafluoroethylene, the latter is in the form of fibrids made by applying a compressive shear action to particles and the heating step is carried out so that the polytetrafluoroethylene fibrids are fused and cause to shrink.
IPC 1-7
IPC 8 full level
C25B 13/06 (2006.01); C25B 13/04 (2006.01); D01D 5/40 (2006.01)
CPC (source: EP)
C25B 13/04 (2013.01); D01D 5/40 (2013.01)
Citation (search report)
- AT 327957 B 19760225 - DIAMOND SHAMROCK CORP [US]
- US 4070257 A 19780124 - MOTANI KENSUKE, et al
- GB 1498733 A 19780125 - HOOKER CHEMICALS PLASTICS CORP
- GB 1410313 A 19751015 - DIAMOND SHAMROCK CORP
Designated contracting state (EPC)
BE DE FR NL
DOCDB simple family (publication)
EP 0048617 A1 19820331; EP 0048617 B1 19850220; BR 8105955 A 19820608; CA 1207705 A 19860715; DE 3169066 D1 19850328; JP S5785985 A 19820528; MX 167581 B 19930330
DOCDB simple family (application)
EP 81304327 A 19810921; BR 8105955 A 19810917; CA 383721 A 19810812; DE 3169066 T 19810921; JP 14929581 A 19810921; MX 18924581 A 19810921