Method to recover chemicals in mechanical pulping
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United States of America Patent
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Issued Date -
Jan 29, 2009
app pub date -
Aug 8, 2007
filing date -
Jul 25, 2007
priority date (Note) -
Abandoned
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Abstract
The present invention refers to a method to recover chemicals in mechanical pulping by evaporating mechanical pulping or recycled fibre plant effluent and burning the received concentrate under oxidative atmosphere to yield sodium carbonate. According to the invention said sodium carbonate is dissolved into water together with CaO in order to convert said sodium carbonate into sodium hydroxide at least partly.
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