Alkali resistant hyperfiltration membrane

Details Alkali resistant hyperfiltration membrane Alkali resistant hyperfiltration membrane

1989-04-14

1990-01-23

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210490, 21050037, B01D 1300

Patent

active

048956619

ABSTRACT:
A novel hyperfiltration membrane and process for making the same is described. The membrane is useful for processing copper electroless solutions to concentrate for re-use salts of chelating agents. The membrane can be prepared by crosslinking a water-compatible polymer in the presence of a strong mineral acid, such as phosphoric acid.

REFERENCES:
patent: 3852388 (1974-12-01), Kimura
patent: 3926798 (1975-12-01), Cadotte
patent: 4073733 (1978-02-01), Yamauchi et al.
patent: 4279752 (1981-07-01), Sueoka et al.
patent: 4366062 (1982-12-01), Kurihara
patent: 4559139 (1985-12-01), Uemura et al.
patent: 4609468 (1986-09-01), Cramm
patent: 4634531 (1987-01-01), Nakagawa et al.

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