Removal of colored substances from aqueous liquids

US9161868B2 · kind B2 · utility

Assignee

• Kimberly-Clark Worldwide, Inc. · US

Inventors

• Francesca Corbellini · Düsseldorf, DE
• Eckhard Purkner · Düsseldorf, DE
• Elisabeth Baumgarten · Duisburg, DE
• Hans Bouten · Geldern, DE
• Arndt Scheidgen · Essen, DE
• Franz Aschenbrenner · Burgkirchen an der Alz, DE
• DooHong Kim · Singapore, SG
• Priscilla Eng Choo Goh · Singapore, SG

Key dates

• Filing date: Aug 31, 2010
• Grant date: Oct 20, 2015
• Expiry date: May 17, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2013/8497
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The use of a decolorizing composition for removing colored substances from aqueous fluids (e.g., colored pigments, blood-containing fluids, etc.) is provided. The decolorizing composition contains one or more inorganic salts. In one embodiment, for example, the composition contains a mixture of sodium sulfate (Na2SO4) and monopotassium phosphate (KH2PO4). The decolorizing composition may be placed in fluid communication with an absorbent core, a liquid-permeable layer, or combinations thereof, in an absorbent article to help decolorize blood-containing fluids (e.g., menses) exuded from the body.