Method for recovering hydrolysate
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United States of America Patent
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May 30, 2017
Grant Date -
May 12, 2016
app pub date -
Nov 3, 2015
filing date -
Nov 7, 2014
priority date (Note) -
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Abstract
The method is for producing pulp. More particularly, a displacement batch cooking process comprises recovery of a first treatment liquid by draining of the digester, preferably not using a displacement liquid. The method may preferably be used in a prehydrolysis step, wherein the recovery of the by-products is improved. In the recovery step, after the target P-factor in the prehydrolysis stage is reached, the hydrolysate is withdrawn by draining in at least one phase obtaining a strong first liquid and thereafter any residual hydrolysate may be displaced.
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