EP 0990020 B1 20020814 - METHOD FOR WASHING CLOTHES, IN PARTICULAR WORKING CLOTHES
Title (en)
METHOD FOR WASHING CLOTHES, IN PARTICULAR WORKING CLOTHES
Title (de)
VERFAHREN ZUM WASCHEN VON WÄSCHE, INSBESONDERE VON BERUFSBEKLEIDUNG
Title (fr)
PROCEDE DE LAVAGE DU LINGE, EN PARTICULIER DE VETEMENTS DE TRAVAIL
Publication
Application
Priority
- DE 19726287 A 19970620
- EP 9803543 W 19980612
Abstract (en)
[origin: US6398820B1] A process for washing laundry is provided in which a washing alkali component and a surfactant component are combined with water to form a wash liquor, the wash liquor is combined with laundry in a standard washing machine for institutional laundries, and the wastewater from the wash is treated by membrane filtration, where the throughflow rate is reduced by less than 10 percent over an operating time of 120 hours. The washing alkali component is composed of an anionic surfactant and a water-soluble silicate; an alkali metal hydroxide and a complexing agent; or an anionic surfactant and water-soluble silicate and an alkali metal hydroxide, a complexing agent, or a mixture of an alkali metal hydroxide and a complexing agent. The surfactant component is composed of a nonionic surfactant selected from the group consisting of C8-18 fatty alcohol alkoxylates containing at least 5 alkoxy groups, C8-18 fatty alcohol ethoxylates containing at least 7 ethoxy groups, C8-18 fatty alcohol ethoxylate/propoxylates containing at least 4 ethoxy groups and at least 2 propoxy groups in the molecule, and mixtures thereof.
IPC 1-7
IPC 8 full level
C11D 1/83 (2006.01); C11D 3/02 (2006.01); C11D 3/08 (2006.01); C11D 3/12 (2006.01); C11D 3/36 (2006.01); C11D 11/00 (2006.01); C11D 1/06 (2006.01); C11D 1/12 (2006.01); C11D 1/14 (2006.01); C11D 1/29 (2006.01); C11D 1/72 (2006.01); C11D 1/722 (2006.01)
CPC (source: EP US)
C11D 1/83 (2013.01 - EP US); C11D 3/08 (2013.01 - EP US); C11D 3/364 (2013.01 - EP US); C11D 1/06 (2013.01 - EP US); C11D 1/12 (2013.01 - EP US); C11D 1/123 (2013.01 - EP US); C11D 1/126 (2013.01 - EP US); C11D 1/14 (2013.01 - EP US); C11D 1/29 (2013.01 - EP US); C11D 1/72 (2013.01 - EP US); C11D 1/722 (2013.01 - EP US); C11D 2111/12 (2024.01 - EP US); C11D 2111/48 (2024.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK FR GB IT LI NL SE
DOCDB simple family (publication)
US 6398820 B1 20020604; AT E222284 T1 20020815; BR 9810220 A 20000808; CA 2295015 A1 19981230; CA 2295015 C 20091201; DE 19726287 A1 19981224; DE 59805198 D1 20020919; DK 0990020 T3 20021104; EP 0990020 A1 20000405; EP 0990020 B1 20020814; NO 996307 D0 19991217; NO 996307 L 19991217; PL 187141 B1 20040531; PL 337508 A1 20000828; WO 9859025 A1 19981230
DOCDB simple family (application)
US 44625600 A 20000218; AT 98937476 T 19980612; BR 9810220 A 19980612; CA 2295015 A 19980612; DE 19726287 A 19970620; DE 59805198 T 19980612; DK 98937476 T 19980612; EP 9803543 W 19980612; EP 98937476 A 19980612; NO 996307 A 19991217; PL 33750898 A 19980612