Process for manufacturing a partially permeable membrane

Details Process for manufacturing a partially permeable membrane Process for manufacturing a partially permeable membrane

C - Chemistry, Metallurgy

25

F

204/20, 204/86.5

C25F 3/04 (2006.01) B01D 67/00 (2006.01) B01D 69/12 (2006.01) B01D 71/02 (2006.01)

Patent

CA 1315732

ABSTRACT A process for manufacturing a partially permeable membrane is such that a 20-200 µm thick aluminum foil in the non-recrystallised condition is etched in an electrolyte at a current density in the range 2-20 kA/m to form a partially permeable aluminum foil membrane having through-flow pores, and the surface is given an after-treatment to prevent hydration reactions; the membrane is particularly suitable for ultrafiltration, gas separation or pervaporation and to that end can also be employed in combination with a polymer membrane.

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