Recycling process
AssigneeWorn Again Technologies Limited
InventorsAdam Walker, Joshua E.S. Reid, Lauri Kari Johannes Hauru
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Abstract
The present invention provides a process for separating cellulose from a feedstock, comprising the steps of: a) wetting the cellulose with a first solvent system to form wet cellulose; b) contacting the wet cellulose with a second solvent system to form a mixture; c) maintaining the mixture at a first temperature for a first period of time; d) maintaining the mixture at a second temperature for a second period of time to dissolve the cellulose; and e) removing the first and second solvent system containing the dissolved cellulose.
Claims26
A process for separating cellulose from a feedstock, comprising the steps of:
- a) wetting the cellulose with a first solvent system to form wet cellulose, wherein the first solvent system comprises an amide;
- b) contacting the wet cellulose with a second solvent system to form a mixture, wherein the second solvent system comprises an ionic liquid comprising an acid and a base;
- c) maintaining the mixture at a first temperature for a first period of time;
- d) maintaining the mixture at a second temperature for a second period of time to dissolve the cellulose;
- and
- e) removing the first solvent system and the second solvent system containing the dissolved cellulose;
- wherein the first temperature is different from the second temperature;
- and
- wherein the mixture comprises no more than 4 wt % of water.
Dependencies are inferred from the claim text.