High molecular weight oxidized cellulose
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United States of America Patent
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Issued Date -
Jun 13, 2002
app pub date -
Dec 11, 2001
filing date -
Dec 12, 2000
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Abandoned
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Abstract
The invention pertains to a process for producing oxidized cellulose having a high molecular weight, by pre-treating cellulose in a non-alkaline solvent for cellulose so as to lower its crystallinity, and then oxidizing it using an oxidizing system predominantly oxidizing the 6-hydroxymethyl groups or the 2,3-dihydroxyethylene groups to carbaldehyde and/or carboxyl groups. The oxidizing agent is preferably a nitroxyl compound or periodate, and the product is useful as a water-absorbent.
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