Liquid purification or separation – Filter – Material
Patent
1977-09-07
1980-11-18
Hart, Charles N.
Liquid purification or separation
Filter
Material
264 49, 264200, 264203, 521 61, B01D 1304, B01D 3100
Patent
active
042344310
ABSTRACT:
The invention concerns a membrane filtration type hollow fiber. It is composed of a single material phase which material is a chain high polymer such as cellulose acetate and capable of forming fibers by the spinning of the high polymer. The cylindrical wall defining the hollow fiber represents a three-dimensional net-like structure of fine filtering passages. This structure occupies substantially the whole mass of the tubular wall or a closed ring band zone when seen in any cross-section of the wall, providing thus an effective and active filtering zone. The pore rate amounts to at least 55%, and active points of the filtering passages for governing minimum passable sizes of the passages for solids included in a filtering liquor to be treated upon are distributed at random throughout at least the active zone. These sizes are nearly uniform.
REFERENCES:
patent: 3592953 (1971-07-01), Ward
patent: 3888771 (1975-06-01), Isuge et al.
patent: 3930105 (1975-12-01), Christen et al.
patent: 3975478 (1976-08-01), Leonard
patent: 4062782 (1977-12-01), Kunst et al.
Mishiro Mashahiro
Nishikawa Tokio
Ohashi Shigeyasu
Yokokawa Yasuo
Asahi Kasei Kogyo Kabushiki Kaisha
Hart Charles N.
Sadowski David R.
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