Method for decolorizing textile materials
US10640914B2 · kind B2 · utility
0Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2018 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Mar 22, 2038 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P5/134
- WIPO fieldTextile and paper 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 6 or less, the treatment composition comprising sodium formaldehyde sulfoxylate, 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.