| 摘要 |
Asbestos-free diaphragms for electrolysis cells, use of such diaphragms in combination with a cathodic member and a process for obtaining such diaphragms and combination of such diaphragms with a cathodic member, by a wet route. The invention relates more particularly to a microporous diaphragm capable of being formed in situ by a wet route, comprising an asbestos-free fibrous sheet whose fibres are microconsolidated by a fluoropolymer, the whole being sintered, the said sheet containing essentially from 3 to 35% by weight of fluoropolymer, binding the fibres, from 0 to 50% by weight of a gel of oxohydroxide of at least one metal from groups IVA, IVB, VB and VIB of the Periodic Classification or of the lanthanide and actinide series, from 20 to 95% by weight of a mixture of polytetrafluoroethylene fibres and of inorganic fibres, the inorganic fibres representing from 1 to 80% by weight of the said mixture and being chosen from carbon, graphite or titanate fibres and their mixtures and its optional use in combination with a precathodic sheet. These diaphragms and combinations can be employed especially in chlorine-soda electrolysis cells. |
