Semipermeable membrane mass transfer apparatus having slotted su

Liquid purification or separation – Casing divided by membrane into sections having inlet – Energy recovery from treated liquid

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2104931, B01D 3100

Patent

active

044379900

ABSTRACT:
A mass transfer apparatus for use in hemodialysis and ultrafiltration wherein a semi-permeable membrane is folded to form a stack of accordion pleats and is arranged within a ported housing to form two separate fluid chambers for blood and dialysate. A plurality of discrete planar support members of open-mesh plastic material are associated with the membrane, such support members each being flat and unfolded, and preferably being arranged to provide a pair of such members in superimposed contiguous relation within each pleat only on the dialysate side of the membrane. One of the support members of each contiguous pair has at least one transverse slot which extends the full thickness of that member and in which the plastic material of that member is completely absent. The transverse slot extends away from an edge of the one support member facing towards a blood flow port of the housing and terminates short of the opposite edge of that support member.

REFERENCES:
patent: 4028252 (1977-06-01), Morris
patent: 4199457 (1980-04-01), Esmund

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