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US 10,329,359 B2Granted
Method for producing microfibrillated cellulose and microfibrillated cellulose
AssigneeKemira Oyj
InventorsMarcus Lillandt, Veli-Matti Vuorenpalo, Kari Vanhatalo
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Abstract
The invention relates to a method for producing microfibrillated cellulose, where a suspension comprising cellulose derivative in a liquid phase which comprises an organic solvent is provided. The suspension of cellulose derivative is mechanically treated and microfibrillated cellulose is obtained. At least a part of the liquid phase from the microfibrillated cellulose is separated and microfibrillated cellulose with a dry solids content of >30 weight-% is obtained.
Claims8
A method for producing microfibrillated cellulose, comprising steps
- (a) providing a suspension comprising a cellulose derivative in a liquid phase which comprises 50-100 weight-% of an organic solvent and 0-50 weight-% of water,
- (b) mechanically treating the suspension of the cellulose derivative by homogenization or fluidization and obtaining microfibrillated cellulose, and
- (c) separating at least a part of the liquid phase from the microfibrillated cellulose and obtaining microfibrillated cellulose with a dry solids content of >30 weight-%,
- wherein the cellulose derivative is selected from the group consisting of carboxymethyl cellulose, TEMPO-oxidized cellulose and microcrystalline cellulose, and the organic solvent is alcohol, acetone or any mixture thereof.
1 more element
Dependencies are inferred from the claim text.