Process for manufacturing a partially permeable membrane

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

1986-11-18

1988-02-02

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

204 33, 204 383, 20412955, 204295, 2041293, 20412995, C25D 548, C25D 544, B23H 914, C25F 304

Patent

active

047227710

ABSTRACT:
A process for manufacturing a partially permeable membrane is such that a 20-200 .mu.m thick aluminum foil in the non-recrystallized condition is etched in an electrolyte at a current density in the range 2-20 kA/m.sup.2 and the surface 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.

REFERENCES:
patent: 2859148 (1958-11-01), Altenpohl
patent: 3085950 (1963-04-01), Thomas et al.
patent: 3352769 (1967-11-01), Ruben
patent: 3578570 (1971-05-01), Kissin
patent: 3666642 (1972-05-01), Alwan et al.
patent: 4204919 (1980-05-01), Randall, Jr. et al.
patent: 4470885 (1984-09-01), Randall, Jr. et al.
patent: 4484252 (1984-11-01), Ruijgrok et al.

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