Removal of excess dye from new textiles
US5356437A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Oct 7, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/13
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dye leached from dyed or printed textiles in an aqueous solution can be decolorized by adding enzymes that utilize hydrogen peroxide or molecular oxygen for the oxidation of organic or inorganic substances, including colored substances, together with a source of H.sub.2 O.sub.2 or O.sub.2. Such enzymes are usually termed peroxidases and oxidases, respectively. This treatment reduces the risk of back-straining (redeposition of dye onto textile) even when less water is used. The enzymatic bleaching of released dyestuff will decrease process time as well as the amount of energy and water needed to achieve a satisfactory quality of the textile, and the color of the waste water is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.