Process for machine washing of soiled articles using a water-insoluble cation-exchange polymer

US4144093A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Elmar Reinwald · Hilden, DE
• Milan J. Schwuger · Haan, DE
• Heinz Smolka · Langenfeld, DE
• Peter Krings

Key dates

• Filing date: Aug 4, 1977
• Grant date: Mar 13, 1979
• Expiry date: Aug 4, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D2111/12
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The machine washing of solid material (e.g. dishes and clothes) in hard water areas is enhanced when the washing solution has a dissolved content of a sequestering agent for calcium ions and is contacted with an insoluble cation exchange resin in particulate state, the washing solution being passed through a filter containing the resin during the course of the washing operation. The filter is maintained separate and spaced from the washing area. The cation exchange resin may be contained in a filter of the whirlpool type, so that the particles are maintained in aqueous suspension without coming into contact with the materials being washed, or it may be contained as a unitary porous lining of a filter.