US 11,718,540 B2
Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity
Victor Fuk-Pong Man, Saint Paul, MN (US); Michael Charles Denoma, Saint Paul, MN (US); and Steven E. Lentsch, Saint Paul, MN (US)
Assigned to Ecolab USA Inc., Saint Paul, MN (US)
Filed by ECOLAB USA INC., Saint Paul, MN (US)
Filed on Aug. 28, 2019, as Appl. No. 16/554,237.
Application 16/554,237 is a division of application No. 13/791,276, filed on Mar. 8, 2013, granted, now 10,435,308.
Prior Publication US 2019/0389741 A1, Dec. 26, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. C02F 1/24 (2023.01); B01D 17/04 (2006.01); B01D 19/02 (2006.01); B01D 19/04 (2006.01); B03D 1/004 (2006.01); B03D 1/008 (2006.01); B03D 1/24 (2006.01); B09C 1/08 (2006.01); B03D 1/01 (2006.01); B03D 1/012 (2006.01); B03D 1/014 (2006.01); C02F 1/00 (2023.01); C02F 1/32 (2023.01); C02F 1/44 (2023.01); C02F 1/68 (2023.01); C02F 101/20 (2006.01); C02F 101/32 (2006.01); C02F 103/00 (2006.01); C02F 103/30 (2006.01); C02F 103/32 (2006.01); E02B 15/04 (2006.01)
CPC C02F 1/24 (2013.01) [B01D 17/047 (2013.01); B01D 19/02 (2013.01); B01D 19/0404 (2013.01); B03D 1/008 (2013.01); B03D 1/0043 (2013.01); B03D 1/24 (2013.01); B09C 1/08 (2013.01); B03D 1/01 (2013.01); B03D 1/011 (2013.01); B03D 1/012 (2013.01); B03D 1/014 (2013.01); B03D 2201/04 (2013.01); B03D 2203/006 (2013.01); C02F 1/004 (2013.01); C02F 1/32 (2013.01); C02F 1/444 (2013.01); C02F 1/682 (2013.01); C02F 1/683 (2013.01); C02F 2101/20 (2013.01); C02F 2101/32 (2013.01); C02F 2103/007 (2013.01); C02F 2103/30 (2013.01); C02F 2103/32 (2013.01); C02F 2303/24 (2013.01); C02F 2305/04 (2013.01); E02B 15/041 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of improving oil removal and water purification by foam fractionation from an oil/aqueous phase solution comprising:
adding to said solution an effective amount of an associative thickener in the presence of an effective amount of surfactant,
wherein the viscosity of the associative thickener is more than about 10,000 mPas at a shear rate of 1 sec−1.