Process of making cellulose pulp with a sulphite cooking liquor containing sulphide and a quinone or hydroquinone compound
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United States of America Patent
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Nov 22, 1988
Issued Date -
N/A
app pub date -
Feb 16, 1988
filing date -
Oct 10, 1984
priority date (Note) -
Expired
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Abstract
A process of manufacturing cellulose pulp from wood by digesting the wood with sulphite cooking liquor containing additions of sulphide and in the presence of a quinone or hydroquinone compound. According to the invention, the mole ratio between sulphide and sulphite shall amount to 0.01-0.2, preferably 0.05.0.15, suitably 0.08-0.12.
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