Title:
METHOD FOR FILTERING OIL
Document Type and Number:
WIPO Patent Application WO/2021/153486
Kind Code:
A1
Abstract:
An objective of the present invention is to provide a technology whereby the superior permeability of a porous film is restored and preserved through a simple method, and oil filtration operation is sustained at a long-term high level of processing capability. The present invention provides a method for filtering oil, the method including: a step (A) in which a hydrophobic gas is passed through a porous film primarily composed of a hydrophobic polymer; and a step (B) in which oil is passed through the porous film, wherein, after the hydrophobic gas having passed through the porous film during step (A) is confirmed to have a relative humidity of 0–60%, the oil transitioning to step (B) is filtered.
Inventors:
SHIMURA SHUN (JP)
HANAKAWA MASAYUKI (JP)
IWAI KENTA (JP)
HANAKAWA MASAYUKI (JP)
IWAI KENTA (JP)
Application Number:
PCT/JP2021/002396
Publication Date:
August 05, 2021
Filing Date:
January 25, 2021
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D61/10; B01D61/14; B01D63/02; B01D65/02; B01D65/06; B01D69/00; B01D71/34
Foreign References:
| JPS6017478B2 | 1985-05-02 | |||
| JP2007260671A | 2007-10-11 | |||
| JPS5494167A | 1979-07-25 | |||
| JPS58194995A | 1983-11-14 | |||
| JPS58194996A | 1983-11-14 | |||
| JPS5920394A | 1984-02-02 |
Other References:
See also references of EP 4098350A4
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