Patent ID: 11866519
Assignee: WOOL RESEARCH ORGANISATION OF NEW ZEALAND INCORPORATED
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  D | IPC C

Claim 0:
1. A process for producing a cellulose-containing material comprising:
(a) contacting a cellulose source with a solvent comprising zinc ions and formic acid to provide a solution;
(b) extruding the solution from (a) into a coagulation bath to provide a solid material;
(c) immersing the solid material from (b) in an oxidising solution comprising aqueous hydrogen peroxide or in water in the absence of an oxidising agent;
(d) freezing the oxidising solution or water in which the solid material is immersed; and
(e) when the solid material from (b) is immersed in an oxidising solution, isolating the solid material from (d), or when the solid material from (b) is immersed in water in the absence of an oxidizing agent, thawing the frozen water from (d), removing the solid material from the thawed water, and drying the solid material to provide the cellulose-containing material.