METHOD FOR MANUFACTURING PAPERMAKING PULP
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United States of America Patent
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Issued Date -
May 17, 2012
app pub date -
Oct 23, 2009
filing date -
Oct 24, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a method for manufacturing papermaking pulp, including: a step of refining wood, including an ozone treatment, so as to obtain a mechanical pulp; a deacidification step including placing the mechanical pulp in contact with a deacidification composition including at least one alkaline agent for more than one hour; and a bleaching step including placing the deacidified pulp in contact with a bleaching composition; wherein the pH varies by less than 0.2 point during the last 30 minutes of the deacidification step, and the pH is 6. to 10 at the end of the deacidification step.
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