Method of deinking printed waste cellulosic stock
US3986922A · kind A · utility
17Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Apr 14, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Printed waste cellulosic stock can be efficiently deinked by pulping the stock in the presence of based on the weight of the stock from 0.5 to 2% by weight of an alkali metal hydroxide and from 0.3 to 0.7% by weight of certain phosphate mono and diesters anionic surfactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.