Oxidative method for decolorizing textile materials
US11001961B2 · kind B2 · utility
0Cited by
9References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 20, 2018 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Apr 6, 2038 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P5/132
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The disclosure relates to a method for decolorization of a dye-colored synthetic polymer, which includes the steps of treating a dye-colored synthetic polymer, such as polyester, with a treatment composition at pH 4 or less, the treatment composition comprising hydrogen peroxide, an iron catalyst, water, and a ketone. The resulting decolorized synthetic polymer is then separated from the treatment composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.