Method for removing stickies from secondary fibers using supercritical CO.sub.2 solvent extraction
US5009746A · kind A · utility
27Cited by
22References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1990 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Oct 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S162/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing sticky contaminants ("stickies") from cellulose-containing fibers such as waste paper is provided. The process comprises contacting the fibers with supercritical or near supercritical carbon dioxide for a period of time sufficient to extract a substantial portion of the stickies without substantially damaging the fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.