Process for the colour stripping and bleaching of coloured waste paper
US5266158A · kind A · utility
3Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Mar 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Process for color stripping and bleaching of colored waste paper by treatment by means of monoperoxysulphuric acid or of one of its salts, according to which the treatment is performed in the presence of a halide ion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.