Process for removing inorganic components that form ash on ignition and oily waste from paper during recycling
US5389200A · kind A · utility
15Cited by
9References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Apr 26, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for treating wastepaper to remove oily waste and inorganic components, which comprises: (a) forming an organoclay treating composition in a wastepaper aqueous system; (b) contacting the wastepaper aqueous system with an amount of the organoclay effective to remove from the wastepaper oily waste and inorganic components; and (c) recovering paper pulp from the aqueous system. The process is effective in wastepaper treatment systems using both air flotation removal as well as systems utilizing water-washing processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.