Toyo Boseki Kabushiki Kaisha

Tetsuo Ukai

Masaaki Sekino

Yoshiyuki Fujita

Hiroshi Matsumoto

Hideshi Kuzumoto

Chikara Kawamura

Akira Uejima

Katsuhisa Numata

A membrane separation apparatus of hollow fiber type which comprises a hollow fiber package body in a cylindrical shape comprising a core pipe or tube available as a passage for a fluid and a hollow fiber layer surrounding said core pipe or tube, said hollow fiber layer being formed by arranging hollow fibers having a selective permeability around and on the outer surface of said core pipe or tube, characterized in that (1) at least two perforated holes are provided on the wall of said core pipe or tube at the position near either one of the entrance or exit of said passage so as to flow the fluid into the hollow fiber layer therethrough and (2) the outer surface of the hollow fiber package body is covered by a film non-permeable to the fluid but leaving uncovered the edge portion of the outer surface opposite to the edge portion where said hole is present on the wall of said core pipe or tube.

Membrane separation apparatus

A fluid separation element comprising a casing and a bundle of selectively permeable hollow fibers accommodated therein, the bundle being potted with a resinous potting agent at the end portions and the gaps among the hollow fibers being blocked with the resinous potting agent, characterized in that (1) the ratio of the porosity of the membrane of the hollow fiber at the effective permeation portion (HA) and the porosity of the membrance of the hollow fiber at the potting portion (HB) satisfies the following condition: 0.9.gtoreq.HB/HA.gtoreq.0.4 and (2) the outer diameter of the hollow fiber at the effective permeation portion (OD.sub.A) and the outer diameter of the follow fiber at the potting portion (OD.sub.B) satisfies the following condition: 0.95.gtoreq.OD.sub.B /OD.sub.A .gtoreq.0.7, whereby the firm potting between the hollow fibers and the resinous potting agent is achieved, and a good separation efficiency without the increase of a pressure loss can be maintained for a long period of time.

Fluid separation element

A hollow fiber membrane-type fluid separation apparatus useful for selective separation of fluids in various techniques such as gas permeation, liquid permeation, dialysis, ultrafiltration, reverse osmosis, etc., which comprises at least one pair of unit structures which are arranged uniaxially in series within a cylindrical pressure vessel, said pair of unit structures comprising

Fluid separation apparatus

A hollow fiber assembly having a selective permeability including cylindrical arrangements of hollow fibers having selective permeability comprising mainly a cylindrical layer of hollow fibers formed by a crisscross arrangement of hollow fibers, a hollow portion which exists inside the above cylindrical layer of hollow fibers, a plurality of engaging members which are respectively separated from one another in said hollow portion, a resin wall (A) which is disposed at an open end of said hollow fibers and arranged to be open to the exterior without leaving any space between said fibers and with separation from said engaging means, a resin wall (B) which is disposed at the other end of said assembly for fixing the end of said assembly, an elastic supporting member for controlling the distance between the two resin walls (A) and (B), and a fluid supply conduit.

Growing community of inventors

Otsu, Japan

Tetsuo Ukai