Process for selective dialysis using polymeric affinity adsorben

Details Process for selective dialysis using polymeric affinity adsorben Process for selective dialysis using polymeric affinity adsorben

1985-06-10

1990-10-16

Spear, Frank

Liquid purification or separation

Processes

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

210648, B01D 6126

Patent

active

049632647

ABSTRACT:
A process for the selective dialysis of liquid streams containing different materials comprises the steps of providing a porous membrane in a cell, the membrane having pores of sufficient dimension to allow passage of the different materials therethrough, circulating an affinity adsorbent stream against a first side of the membrane, where the adsorbent has a dimension larger than that of the pores and has a binding capacity for at least one but not all of the different materials and, passing the liquid stream containing the different materials against a second side of the membrane whereby certain of the materials become bound to the adsorbent upon passing through the membrane to the first side thereof and become separated from others of the materials which can return to the second side of the membrane. A separate stripping process is also provided which can be employed in conjunction with the dialysis process or alone where it is desirable to remove bound materials from an affinity adsorbent material.

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patent: 4741831 (1988-05-01), Grinstead
"Copper Selective Ion-Exchange Resin with Improved Iron Rejection" R. R. Grinstead, Journal of Metals, vol. 31, No. 3 (1979) 13-16.
"Membrane-Based Solvent Extraction for Selective Removal and Recovery of Metals" B. M. Kim, Journal of Membrane Science, 21 (1984) 5-19.

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