US 12,064,731 B2
Porous membranes for high pressure filtration
Emanuele Di Nicolo′, Gorla Minore (IT)
Assigned to SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US)
Appl. No. 17/414,361
Filed by SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US)
PCT Filed Dec. 18, 2019, PCT No. PCT/EP2019/085902
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/127454, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18214560 (EP), filed on Dec. 20, 2018.
Prior Publication US 2022/0040646 A1, Feb. 10, 2022
Int. Cl. B01D 67/00 (2006.01); B01D 61/02 (2006.01); B01D 69/02 (2006.01); B01D 69/06 (2006.01); B01D 69/08 (2006.01); B01D 69/12 (2006.01); B01D 71/52 (2006.01); B01D 71/56 (2006.01); B01D 71/72 (2006.01); C02F 1/44 (2023.01); C08G 61/10 (2006.01); C08G 61/12 (2006.01); C08J 5/18 (2006.01); C08J 9/00 (2006.01); C08J 9/28 (2006.01); C08L 65/02 (2006.01); C02F 103/08 (2006.01)
CPC B01D 67/0011 (2013.01) [B01D 61/025 (2013.01); B01D 67/002 (2013.01); B01D 69/02 (2013.01); B01D 69/06 (2013.01); B01D 69/08 (2013.01); B01D 69/1216 (2022.08); B01D 71/5223 (2022.08); B01D 71/56 (2013.01); B01D 71/72 (2013.01); C02F 1/441 (2013.01); C08G 61/10 (2013.01); C08G 61/12 (2013.01); C08J 5/18 (2013.01); C08J 9/0061 (2013.01); C08J 9/283 (2013.01); C08L 65/02 (2013.01); B01D 2323/12 (2013.01); B01D 2325/02 (2013.01); B01D 2325/0283 (2022.08); B01D 2325/02832 (2022.08); B01D 2325/02833 (2022.08); B01D 2325/02834 (2022.08); B01D 2325/24 (2013.01); C02F 2103/08 (2013.01); C08G 2261/1426 (2013.01); C08G 2261/312 (2013.01); C08G 2261/516 (2013.01); C08J 2201/0544 (2013.01); C08J 2339/06 (2013.01); C08J 2365/02 (2013.01)] 15 Claims
 
1. A method for purifying a fluid containing at least one contaminant, said method comprising the steps of
(i) providing a fluid containing at least one contaminant;
(ii) providing a flat membrane [membrane (PP)] comprising at least one porous layer [layer (PP)] comprising at least one polyphenylene polymer [polymer (PP)];
contacting said fluid containing at least one contaminant and said membrane (PP) by applying a pressure higher than 1 bar to said fluid; and
(iv) recovering the fluid free from said at least one contaminant;
wherein said polymer (PP) comprises at least about 10 mole percent (per 100 moles of polymer (PP)) of repeating units (Rpm) represented by the following formula:

OG Complex Work Unit Chemistry
and at least about 10 mol percent repeat units (Rpp) represented by the following formula:

OG Complex Work Unit Chemistry
wherein R1, R2, R3, R4, R5, R6, R7, and R8 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, aryloxy, alkylketone, arylketone, fluoroalkyl, fluoroaryl, bromoalkyl, bromoaryl, chloroalkyl, chloroaryl, alkylsulfone, arylsulfone, alkylamide, arylamide, alkylester, arylester, fluorine, chlorine, and bromine,
and
wherein said flat membrane is characterized by:
a tensile modulus (measured according ASTM D638 type V) of at least 201 MPa;
a gravimetric porosity of at least 0.55; and
a ratio between the tensile modulus and the gravimetric porosity of at least 243 MPa.