| 摘要 |
PURPOSE:To obtain a diaphragm for electrolysis with superior strength and dimensional stability by dispersing fibers in an aqueous slurry of a synthetic mica type mineral, adding NaOH to disintegrate the fibers, and forming a film by a paper making process using the resulting treating liq. CONSTITUTION:A water-swellable synthetic mica type mineral represented by a formula W1/3-1.0[X2.5-3.0(Z4O10)F2] (where W is Na or Li, X is Li or Mg, and Z is Si or Al) is dispersed in water to prepare an aqueous slurry. Asbestos fibers or asbestos-base fibers are dispersed in the slurry, and an aqueous NaOH soln. or a mixed aqueous soln. contg. NaOH and NaCl is further added and stirred to disintegrate the fibers. A film is formed on a cathode substrate by a paper making process using the resulting treating liq. When a diaphragm for electrolysis manufactured by this mothod is used, NaOH of high concn. can be obtd. by electrolysis at low voltage with high current efficiency.
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