Totally chlorine free bleaching process using recovered filtrate
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United States of America Patent
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Jan 8, 2002
Issued Date -
N/A
app pub date -
May 2, 1995
filing date -
Dec 2, 1992
priority date (Note) -
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Abstract
The present invention relates to a process for producing pulp which is cooked under alkaline conditions and which is bleached without using chlorine-containing bleaching chemicals, in which process used cooking chemicals are recovered in a first recovery installation and used bleaching chemicals are recovered in a second recovery installation. The used cooking and bleaching chemicals can be regenerated and reused.
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