| PATENT ASSIGNEE'S COUNTRY | Germany |
| UPDATE | 09.99 |
| PATENT ASSIGNEE | Voith Sulzer Stoffaufbereitung GmbH |
| PATENT CLAIMS |
Process for increasing degree of whiteness of paper pulp, including printed waste paper in which print includes color print particles, the process comprising - Producing suspension including paper pulp & water - Blending bleaching aids into suspension - Adding bleaching chemicals to suspension - Bleaching suspension under pressure > one bar for 10 min - Subjecting suspension to intense dispersing mechanical treat at specific work of > 20 kWh/to, to a pulp consistency > 15% & pulp T > 40C - Removing major portion of print color particles separated from said suspension |
| PATENT PHOTOCOPY | Available on request |
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