Cross-linked ethylsulfonated dihydroxypropyl cellulose
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United States of America Patent
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Aug 11, 2015
Grant Date -
Aug 1, 2013
app pub date -
Mar 13, 2013
filing date -
Aug 9, 2010
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Abstract
The invention provides methods and compositions for improving the production of alumina hydrate. The invention involves adding one or more cross-linked ethylsulfonated polysaccharides to liquor or slurry in the fluid circuit of the production process. The one or more polysaccharides include cross-linked dextran or cross-linked dihydroxypropyl cellulose. The various polysaccharides can impart a number of advantages including at least some of: greater flocculation effectiveness, increasing the maximum effective dosage, faster settling rate. The production process can be a Bayer process.
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