METHOD OF PRODUCING DISSOLVING PULP
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United States of America Patent
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Issued Date -
Feb 11, 2021
app pub date -
Mar 6, 2019
filing date -
Mar 7, 2018
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Abstract
A process for producing dissolving pulp from comminuted wood-based fibrous material. The process includes the following consecutive stages: cooking comminuted fibrous material with alkaline cooking liquor in a kraft cooking process to produce pulp; treating the cooked pulp in caustic extraction at a temperature of 70-110° C. and in an effective alkali concentration of 60-120 g/l for at least 5 minutes, and washing and oxygen delignifying the caustic extracted pulp.
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