Method for producing a selectively permeable separation module

Details Method for producing a selectively permeable separation module Method for producing a selectively permeable separation module

1997-11-06

2000-03-14

Fortuna, Ana

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050038, 21050023, 21050041, 21050036, 427245, 264 41, B01D 2900

Patent

active

060360305

ABSTRACT:
A method and apparatus is provided for casting a polymeric membrane on the inside surface of porous tubes to provide a permeate filter system capable of withstanding hostile operating conditions and having excellent selectivity capabilities. Any polymer in solution, by either solvent means or melt processing means, is capable of being used in the present invention to form a thin polymer membrane having uniform thickness on the inside surface of a porous tube. Multiple tubes configured as a tubular module can also be coated with the polymer solution. By positioning the longitudinal axis of the tubes in a substantially horizontal position and rotating the tube about the longitudinal axis, the polymer solution coats the inside surface of the porous tubes without substantially infiltrating the pores of the porous tubes, thereby providing a permeate filter system having enhanced separation capabilities.

REFERENCES:
patent: 4410568 (1983-10-01), Iwama et al.
patent: 4698241 (1987-10-01), Roberson
patent: 4980235 (1990-12-01), Scheer et al.
patent: 5173235 (1992-12-01), Kamei et al.
patent: 5212000 (1993-05-01), Rose et al.

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