Liquid purification or separation – Filter – Material
Patent
1988-12-09
1989-10-10
Sever, Frank
Liquid purification or separation
Filter
Material
21032171, B01D 1300
Patent
active
048729833
ABSTRACT:
A dialysis membrane for hemodialysis with improved biocompatibility is composed of a modified cellulose which has a structure represented by the formula ##STR1## Cell is the framework of the unmodified cellulose molecule or of the chitin molecule, in each case without hydroxyl groups. Z is an atom of group V or VI (except oxygen) of the periodic system. Where Z is an atom of group V, T is a hydrogen atom or (X-Y). Where Z is an atom of group VI, T is omitted. (n+s) indicates the mean degree of substitution with 0<n<m and 0.ltoreq.s<m and n+s<m. m=3 in the case of the unmodified cellulose molecule and m=2 in the case of the chitin molecule. -X- can be omitted as desired or -X- and -X'- denote specific divalent groups. -Y and -Y' denote -H and/or specified univalent radicals. X is identical to or different from X' and Y is identical to or different from Y'.
REFERENCES:
patent: 4401807 (1983-08-01), Koshugi
patent: 4721730 (1988-01-01), Furuyoshi et al.
patent: 4770774 (1988-09-01), Ida et al.
Dimantoglou Michael
Kuhne Helmut
Akzo N.V.
Sever Frank
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