Procedure for obtaining nanofibrillated cellulose from recovered paper
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United States of America Patent
Stats
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Dec 2, 2014
Grant Date -
Nov 7, 2013
app pub date -
May 3, 2013
filing date -
May 3, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A procedure for obtaining nanofibrillated cellulose starting from a raw material including recycled or recovered paper, or recovered paper pulp or recovered cellulose comprises the stages of: immersing the raw material in an acetic acid dilution, in a concentration of 10% to 50% by volume, during a time inverse to the concentration of acetic acid; stirring the raw material immersed in the acetic acid dilution; and subsequently subjecting the cellulosic material to a mechanical process of longitudinal separation of fibers, by shear forces applied through a mixer or similar equipment capable of creating enough shearing on cellulose pulp. Thanks to the above procedure nanofibrillated cellulose from recycled paper is obtained with similar features to the nanofibrillated cellulose obtained from virgin cellulose.
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International Classification(s)
- 2013 Application Filing Year
- D21B Class
- 26 Applications Filed
- 23 Patents Issued To-Date
- 88.47 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- D21B Class
- 25 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 2, 2026 |
