Use of anionic surfactant/dispersant blends for the deinking of groundwood newsprint
US5281348A · kind A · utility
7Cited by
20References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1991 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Nov 12, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/05
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A composition and method for the improved deinking of groundwood newsprint is disclosed. The composition comprises an amount, effective for the intended purpose, of: 1) an anionic surfactant, e.g., the ammonium or sodium salts of a sulfated ethoxylate derived from a 12 to 14 carbon linear primary alcohol blend, and 2) a dispersant, e.g., naphthalene-formaldehyde condensates. The method comprises administering a sufficient amount of this combined treatment to a sample of groundwood newsprint for which treatment is desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.