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Enzyme Enhanced Removal of Polymeric Inks and Coatings
Docket Number: 29893
Serial Number: 8183535
Agency:
Forest Service
Date Filed:
Jan. 18, 1994
Abstract:
The invention involves the removal of toner and ink particles. This is achieved when a high-consistency, aqueous suspension of recycled paper containing inks, toners, and other contaminants is heated, adjusted to an appropriate pH, and kneaded to attain fiberization. A low level of a microbial cellulase is added to the pulp and kneaded. Following enzyme treatment, the recycled paper pulp is diluted, a commercial non-ionic flotation surfactant is added and the slurry is processed in a flotation cell.
Inventors:
| Thomas H. Jeffries | John H. Klungness |
| USDA-Forest Service | USDA-Forest Service |
| Madison, WI | Madison, WI |
| (608) 231-9453 | (608) 231-9437 |
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| Marguerite S. Sykes | Kathleen R. Cropsey |
| USDA-Forest Service | USDA-Forest Service |
| Madison, WI | Madison, WI |
| (608) 231-9520 | (608) 231-9520 |
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Industry Keywords:
deinking; recycle; enzyme; contaminant removal; fiber; paper; toner.
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