Hydrogel forming material from byproduct pulp fines
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United States of America Patent
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Jul 5, 2016
Grant Date -
Jun 9, 2016
app pub date -
Dec 9, 2014
filing date -
Dec 9, 2014
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Abstract
A process for making a hydrogel forming material from an unbleached cellulose pulp comprised of isolating pulp fines from the cellulose pulp by screening and/or dissolved air filtration, reacting the isolated pulp fines with alkaline hydroxide to form an alkali cellulose composition, preparing a heterogeneous mixture of the alkali cellulose composition and an etherifying agent, and optionally organic cross-linking agent, and reacting the components of the mixture to produce a hydrogel forming material. A polyvalent metal cross-linking agent can optionally be reacted with the hydrogel forming material to enhance its gel strength.
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