Cross-linked glycerol based polymers as digestion aids for improving wood pulping processes
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United States of America Patent
Stats
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Aug 16, 2016
Grant Date -
Jun 6, 2013
app pub date -
Feb 4, 2013
filing date -
Mar 10, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention provides a method of improving the digestion of wood chips into pulp. The method involves: adding a cross-linked glycerol-based polymer additive to a solution used in the digestion process. This additive is unexpectedly effective at facilitating digestion. The branched and ether structure of the additive allows it to withstand the harsh nature of a high stress environment. In addition, it is more soluble in the harsh condition than other surfactants. The structure, resistance, and particular balance between hydrophobic and hydrophilic regions, causes the additive to increases the interaction between the wood chips and the digestion chemicals. This in turn reduces the costs, the amount of additive needed, and the amount of reject wood chunks that result from the digestion process.
First Claim
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International Classification(s)
- 2013 Application Filing Year
- D21C Class
- 117 Applications Filed
- 108 Patents Issued To-Date
- 92.31 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- D21C Class
- 0 % this patent is cited more than
- 9 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 | Feb 16, 2028 |
