Process for dissolving used paper
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United States of America Patent
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-
May 21, 2002
Grant Date -
Jul 5, 2001
app pub date -
Jan 4, 2001
filing date -
Jan 5, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for dissolving used paper including adjusting a content of solid particles of used paper to a range between about 15 and 35%, kneading the used paper with a specific work of at least about 10 kWh/t, diluting the kneaded used paper to a content of solid particles below about 6%, separating non-fibrous contaminants with wet screening, adjusting a solid material content to less than about 3%, and separating heavy particles with at least one hydrocyclone.
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