Chloride oxidation of dyes in vat and sulfur dyed textiles
US4371373A · kind A · utility
3Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1979 |
| Grant date | Feb 1, 1983 |
| Priority date | — |
| Expiry date | Jan 3, 1999 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P1/222
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Oxidation of dyeings with reduced vat and sulfur dyes, is accomplished in an improved manner with sodium chlorite under acid conditions of preferably pH 4.5-6 at 30.degree.-65.degree. C. in the presence of chelating agents which prevent the release of chlorine or chlorine compounds, such chelating agents being selected from derivatives of amino carboxylic acids, such as EDTA, and hydroxyalkane phosphonic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.