Deinking of newsprint
US4311552A · kind A · utility
9Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1980 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | Feb 19, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Waste newsprint is defibered in an aqueous bath to which is added a deinking agent. The resulting slurry or pulp is rinsed, drained and formed into paper sheets. The deinking agent is a C.sub.14 to C.sub.20 alpha olefin sulfonate or a mixture of C.sub.18 alpha olefin sulfonate and a non-ionic detergent, depending upon the conditions of the deinking bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.