公开(公告)号：DE69505122D1

公开(公告)日：1998-11-05

申请号：DE69505122

申请日：1995-06-08

Applicant: ECOLAB INC

Inventor： FALBAUM DAVID ,  HEI ROBERT ,  MAIER HELMUT ,  MATTIA PAUL

IPC: B01D11/04 ,  B01D17/04 ,  B01D17/05 ,  B01D21/01 ,  C02F1/26 ,  C02F1/54 ,  C09K23/18 ,  C11D1/72 ,  C11D1/88 ,  C11D1/90 ,  C11D1/94 ,  C11D3/02 ,  C11D3/08 ,  C11D3/10 ,  C11D3/33 ,  C11D7/06

Abstract: Improved separation of emulsified hydrophobic organic soils can be obtained from aqueous effluents using an amphoteric carboxylate surfactant material in combination with cationic destabilizer or flocculent materials. Such a treatment in combination with an acidic pH adjustment causes the rapid separation of hydrophobic organic soils from the aqueous stream. The treated aqueous stream is environmentally compatible. Improved laundry detergents comprising an organic amphoteric carboxylate surfactant and selected nonionic surfactants provide both cleaning for fiber and fabric containing items soiled with substantial quantities of hydrophobic soil. The pH of an effluent generated in such cleaning processes can be adjusted to an acid pH and treated with a cationic material causing a break that permits rapid and substantially complete separation of the hydrophobic organic soils from the effluent. Residual concentrations of organic soil in effluent water can be less than 250 ppm and can be as low as 10 ppm.