Method of preparing modified cellulose ether
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United States of America Patent
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Aug 23, 2005
Grant Date -
Jan 16, 2003
app pub date -
Feb 2, 2001
filing date -
Feb 2, 2001
priority date (Note) -
Expired
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Abstract
Process for the production of polysaccharide ethers, e.g. cellulose ethers, are disclosed wherein salts formed during the process, e.g., sodium nitrate or sodium acetate, are converted to their corresponding acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable catiion and/or anion membranes. The acids and bases recovered from the process can be recycled, thereby avoiding the need to provide for disposal of salts.
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