Method of reducing the energy consumption at the refining of cellulose containing material
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United States of America Patent
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Apr 16, 1991
Issued Date -
N/A
app pub date -
May 2, 1989
filing date -
Apr 18, 1986
priority date (Note) -
Expired
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Abstract
Method of reducing the energy consumption at the refining/beating of cellulose-containing material by the addition of alkali to the material for neutralizing acid groups bonded to the fibre wall. According to the invention, the pH-value in the pulp suspension is measured at the refiner outlet, the alkali is added in an amount depending on the measured pH value for neutralization without excess in the beating zone or immediately before the material enters the same, in an amount of 0.05-9 kg/ton, preferably 0.5-5 kg/ton, suitably 1-4 kg/ton, calculated as NaOH.
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