US 11,872,532 B2
Ultrafiltration membranes for dairy protein separation
John E. Tomaschke, San Diego, CA (US)
Assigned to Campbell Membrane Technologies, Inc., El Cajon, CA (US)
Appl. No. 17/272,905
Filed by Campbell Membrane Technologies, Inc., El Cajon, CA (US)
PCT Filed Sep. 4, 2019, PCT No. PCT/US2019/049575
§ 371(c)(1), (2) Date Mar. 2, 2021,
PCT Pub. No. WO2020/051229, PCT Pub. Date Mar. 12, 2020.
Claims priority of provisional application 62/727,368, filed on Sep. 5, 2018.
Prior Publication US 2021/0178341 A1, Jun. 17, 2021
Int. Cl. B01D 71/08 (2006.01); B01D 61/14 (2006.01); B01D 69/02 (2006.01); B01D 71/82 (2006.01); B01D 71/68 (2006.01)
CPC B01D 71/68 (2013.01) [B01D 61/145 (2013.01); B01D 69/02 (2013.01); B01D 71/82 (2013.01); B01D 2325/14 (2013.01)] 20 Claims
 
1. A method comprising:
(a) sulfonating a first poly(aryl ether) to provide a sulfonated poly(aryl ether);
(b) combining the sulfonated poly(aryl ether) and a second poly(aryl ether) to provide a casting solution; and
(c) casting the solution to provide a filtration membrane,
wherein the sulfonated poly(aryl ether) is not isolated prior to casting the membrane.