Modified regenerated cellulose membrane for non-aqueous separati

Details Modified regenerated cellulose membrane for non-aqueous separati Modified regenerated cellulose membrane for non-aqueous separati

1987-05-18

1989-08-01

Spear, Frank

Liquid purification or separation

Processes

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

210655, 21050029, B01D 1300

Patent

active

048531294

ABSTRACT:
Regenerated cellulose membranes used for the separation of organic liquids, for example, ketone dewaxing solvents from dewaxed oil or NMP extraction solvents from extract, have their solute rejection capability enhanced by chemical modification by contacting said membrane with a bifunctional reagent that is reactive with the hydroxy groups in the anhydroglucose units of the regenerated cellulose polymer. The reaction of the bifunctional reagent with the hydroxy groups in the polymer results in the crosslinking of the polymer which, in turn, results in the improvement of the membrane's selectivity in organic liquid separations applications.

REFERENCES:
patent: 3140256 (1964-07-01), Martin et al.
patent: 3276996 (1966-10-01), Laare
patent: 3620970 (1971-11-01), Klug et al.
patent: 3864289 (1975-02-01), Rendall
patent: 4368112 (1983-01-01), Thompson et al.

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