Dialysis membrane composed of polysaccharide ether II

Details Dialysis membrane composed of polysaccharide ether II Dialysis membrane composed of polysaccharide ether II

1993-06-07

1995-06-27

Dawson, Robert A.

Liquid purification or separation

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Material

21050027, 21050029, 536 20, 264 41, 264199, 264563, B01D 6302, B01D 3918

Patent

active

054276845

ABSTRACT:
A dialysis membrane for hemodialysis in the form of sheet films, tubular films, or hollow fibers is composed of a polysaccharide ether. The polysaccharide ether has a structure given by the formula ##STR1## in which cell is the skeleton of the unmodified cellulose molecule or of the chitin molecule, each with no hydroxyl groups, s is equal to 3 for the unmodified cellulose molecule and 2 for the chitin molecule, and x is the degree of etherification, which is in the range from 0.001 to 0.079, and R is an optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, arylalkyl, arylalkenyl, and/or arylalkynyl group with 3 to 25 carbon atoms, and/or the radical of a heterocyclic compound with 3 to 25 carbon atoms, in which the carbon chain may be interrupted by oxygen or sulfur atoms.

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