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US 11,479,913 B2Granted
Fiber production with supercritical fluid phase from cotton straw
OwnerMustafa Soylu, Mehmet Kivanç Alayinventors
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Abstract
Disclosed is a method of obtaining regenerated cellulose fiber by using supercritical-N2O and/or supercritical-CHF3 compounds from cotton straw which are formed as thin chips mechanically.
Claims6
A method for obtaining regenerated cellulose fiber, the method comprising:
- treating cotton straw with acetic acid;
- obtaining cellulose pulp by separating hemi-cellulose from the treated cotton straw;
- removing lignin from the cellulose pulp by bleaching the cellulose pulp;
- using supercritical N2O and/or supercritical CHF3, after the step of removing lignin for diffusing respectively N2O and/or CHF3 between macro molecules of the cellulose pulp;
- obtaining and neutralizing cellulose xanthate from the macro molecules of the cellulose pulp in a coagulation bath;
- and
- pulling out the regenerated cellulose fiber from the coagulation bath.
4 more elements
Dependencies are inferred from the claim text.