Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1988-04-13
1989-01-31
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210693, C02F 128, C02F 140
Patent
active
048013862
ABSTRACT:
A porous water-treating material comprising cut porous strands each comprising a resinous matrix material which consists essentially of a thermoplastic polymer material or a mixture thereof with an inorganic particulate material. Each strand having a number of pores connected to each other and an irregularly rugged peripheral surface which has a ratio in diameter of a circumscribed circle to an inscribed circle in any cross-sectional profile from 1.10:1 to 5.00:1 and a ratio of the distance between circumscribed lines to that between inscribed lines in any side projection profile of from 1.10:1 to 3.00:1. The cut porous strands are prepared by melt-extruding a resinous mixture of the resinous matrix material with a blowing agent at a temperature higher than the melting point of the thermoplastic polymer material and the thermally decomposing point of the blowing material so as to cause the strands to have a number of pores and an irregularly rugged peripheral surface thereof.
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patent: 3729410 (1973-04-01), Abadie et al.
patent: 3800945 (1974-04-01), Fowler
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patent: 4079001 (1978-03-01), Haase et al.
patent: 4332854 (1982-06-01), Parker
patent: 4523995 (1985-06-01), Pall et al.
Habara Hideaki
Kawamura Tomihiko
Matsuda Tadashi
Nakano, deceased Shintaro
Saiki Sumito
Cintins Ivars
Mitsubishi Rayon Co. Ltd.
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