Catalyzer for clean pulping and process for using the same
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United States of America Patent
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Sep 4, 2007
Grant Date -
Mar 23, 2006
app pub date -
Nov 29, 2004
filing date -
Nov 28, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A catalyzer for clean pulping includes sodium salicylate, anion silicate softener, cooking aids, liquid(gaseous) chlorine and water. A process for using the catalyzer for clean pulping includes the following steps: 1, cutting and impurities removing for the raw material, 2, feed preparation and impurities removing, 3, dividing into fibers by refining, 4, catalysis copolymerization, 5, refining, 6, concentration and separation, 7, pulp bleaching, 8, pulp washing and 9, finished pulp. The present invention realizes the clean production; it does not need to digest and does not produce black liquor; the process is simple and is performed at normal temperature; the resource of crops is fully used; the effect of water conservation is remarkable; it is very easy to control each stage separately and/or simultaneously.
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