METHOD FOR MANUFACTURING BLEACHED PULP FROM A FEEDSTOCK COMPRISING RECYCLED PAPER
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United States of America Patent
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Issued Date -
Mar 9, 2023
app pub date -
Dec 9, 2020
filing date -
Jan 9, 2020
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Abstract
A method for manufacturing bleached pulp from a feedstock that includes recycled paper. The method includes steps of: (1) impregnating the feedstock with cooking liquor to yield an impregnated material having a liquor-to-fiber mass ratio of at most about 4:1; (2) cooking the impregnated material to remove at least a portion of the lignin within the impregnated material, thereby yielding a cooked pulp; and (3) bleaching the cooked pulp.
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