Method for filtering through highly permeable acrylic hollow fib

Details Method for filtering through highly permeable acrylic hollow fib Method for filtering through highly permeable acrylic hollow fib

1978-03-20

1980-06-24

Woo, Jay H.

Gas separation

Means within gas stream for conducting concentrate to collector

55 29, 55158, B01D 5910

Patent

active

042093074

ABSTRACT:
A method is provided for fabricating asymmetric acrylic hollow fibers for use in separatory processes as a selective membrane. The fibers are highly permeable and exhibit a high degree of selectivity in discriminating mixtures into their various components. The fibers are formed by extruding an acrylic polymer solution through an annular orifice while simultaneously injecting a coagulating fluid into the bore of the fibers extrudate as it is formed. The extrusion may be directly into a coagulating bath maintained at a temperature of from 60.degree. to 80.degree. or alternatively the freshly extruded fiber may be first passed through an air space (evaporation zone) and thence into the coagulating bath. Following coagulation, the fibers are water washed to remove residual solvent.

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