| 摘要 |
1519070 Diaphragm for chloralkali cell RHONE-POULENC INDUSTRIES 19 Nov 1976 [21 Nov 1975] 48242/76 Heading C7B [Also in Division B5] A chloroalkali electrolysis is effected using as selective diaphragm between the anode and cathode compartments, a laminate comprising an ionexchange membrane bonded in face-to-contact to at least one micro-porous layer, the membrane being preferably bonded between two micro-porous layers. The ion-exchange membrane may be formed from an organic polymer carrying a radical such as -SO 3 H, -COOH, -PO 2 H 2 , -PO 3 H 2 , -AsO 3 H 2 , -SeO 3 H or ArOH e.g. a phenol-formaldehyde, styrene, divinyl benzene, fluorocarbon, polymethacrylic or phenoxy resin or a polysulphone; alternatively, the membrane may contain an inorganic ion-exchange material e.g. a zirconium, titanium or chromium phosphate and polyphosphate. The micro-porous layer(s) may be formed of a fluorocarbon or vinyl polymer e.g. polytetrafluorethylene and asbestos or an organic or inorganic gel e.g. of silica, alumina, titania, thoria, silicoaluminate or phosphate.
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