Method for purifying suspended water by membrane filtration

Details Method for purifying suspended water by membrane filtration Method for purifying suspended water by membrane filtration

2001-01-17

2011-10-25

Menon, Krishnan S (Department: 1777)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S500230, C210S500360, C210S321890

Reexamination Certificate

active

08043508

ABSTRACT:
A method for membrane filtration purification of suspended water, comprising filtering the suspended water under an external pressure through a porous hollow fiber membrane comprising a polyolefin, a copolymer of olefin and halogenated olefin, halogenated polyolefin or a mixture thereof and having an open area ratio in an outer surface of not less than 20% and a pore diameter in a minimum pore diameter layer of not smaller than 0.03 μm and not larger than 1 μm.

REFERENCES:
patent: 5022990 (1991-06-01), Doi et al.
patent: 5049276 (1991-09-01), Sasaki
patent: 6331248 (2001-12-01), Taniguchi et al.
patent: 0 342 026 (1989-11-01), None
patent: 0 923 984 (1999-06-01), None
patent: 2-251233 (1990-10-01), None
patent: 3-288533 (1991-12-01), None
patent: 11-138164 (1999-05-01), None
English Abstract of JP-03-215535, Sep. 20, 1991.
Watanabe et al., Membrane. vol. 24, No. 6, pp. 310-318 (1999) w/ Abstract.
Standard Test Methods for Pore Size Characteristics of Membrane Filters by Bubble Point and Mean Flow Pore Test according to ASTM F316-86 (6 pages).

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