A process for dissolving modified cellulose is disclosed. The process includes contacting modified cellulose with a solvent in a mixture to form swelled modified cellulose and then contacting the mixture with a salt to dissolve the swelled modified cellulose.
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1. A process comprising: forming a mixture by contacting an oxidized cellulose with a solvent under an inert atmosphere to form a swelled oxidized cellulose;adjusting the mixture to a first temperature from about 115° C. to 145° C.;contacting the swelled oxidized cellulose with a salt under the iner
1. A process comprising: forming a mixture by contacting an oxidized cellulose with a solvent under an inert atmosphere to form a swelled oxidized cellulose;adjusting the mixture to a first temperature from about 115° C. to 145° C.;contacting the swelled oxidized cellulose with a salt under the inert atmosphere to form an oxidized cellulose solution; andadjusting the oxidized cellulose solution to a second temperature below the first temperature, the second temperature being from about 90° C. to about 120° C. 2. The process according to claim 1, wherein the first temperature is from about 120° C. to about 140° C. 3. The process according to claim 1, wherein the first temperature is from about 130° C. to about 135° C. 4. The process according to claim 1, wherein the second temperature is from about 100° C. to about 110° C. 5. The process according to claim 1, wherein the solvent is selected from the group consisting of N,N-Dimethylacetamide, N-methyl-2-pyrrolidinone, and combinations thereof. 6. The process according to claim 1, wherein the salt is selected from the group consisting of lithium halides, sodium halides, potassium halides, and combinations thereof. 7. The process according to claim 1, wherein the oxidized cellulose solution includes dissolved oxidized cellulose having a degree of oxidation from about 80% to about 120% of a degree of oxidation of the predissolved oxidized cellulose. 8. The process according to claim 1, wherein the oxidized cellulose solution includes dissolved oxidized cellulose having a molecular weight from about 80% to about 120% of the molecular weight of the predissolved oxidized cellulose. 9. A process comprising: forming a mixture by contacting an oxidized cellulose with a solvent under an inert atmosphere to form a swelled oxidized cellulose, the oxidized cellulose having a degree of oxidation of from about 0.2 to about 1.0;adjusting the mixture to a first temperature from about 115° C. to 145° C.;contacting the swelled oxidized cellulose with a salt under the inert atmosphere to form an oxidized cellulose solution; andadjusting the oxidized cellulose solution to a second temperature below the first temperature, the second temperature being from about 90° C. to about 120° C., wherein the dissolved oxidized cellulose has a degree of oxidation from about 80% to about 120% of the degree of oxidation of the predissolved oxidized cellulose. 10. The process according to claim 9, wherein the first temperature is from about 120° C. to about 140° C. 11. The process according to claim 9, wherein the second temperature is from about 100° C. to about 110° C. 12. The process according to claim 9, wherein the solvent is selected from the group consisting of N,N-Dimethylacetamide, N-methyl-2-pyrrolidinone, and combinations thereof. 13. The process according to claim 9, wherein the salt is selected from the group consisting of lithium halides, sodium halides, potassium halides, and combinations thereof. 14. The process according to claim 9, wherein the salt is present in an amount of from about 0.1% by weight to 3% by weight of the oxidized cellulose. 15. A process comprising: forming a mixture by contacting an oxidized cellulose with a solvent under an inert atmosphere to form a swelled oxidized cellulose;adjusting the mixture to a first temperature from about 115° C. to 145° C.;contacting the swelled oxidized cellulose with a salt under the inert atmosphere to form an oxidized cellulose solution under the inert atmosphere; andadjusting the oxidized cellulose solution to a second temperature below the first temperature, the second temperature being from about 90° C. to about 120° C., wherein the dissolved oxidized cellulose has a molecular weight from about 80% to about 100% of the molecular weight of the predissolved oxidized cellulose. 16. The process according to claim 15, wherein the solvent is selected from the group consisting of N,N-Dimethylacetamide, N-methyl-2-pyrrolidinone, and combinations thereof. 17. The process according to claim 15, wherein the salt is selected from the group consisting of lithium halides, sodium halides, potassium halides, and combinations thereof. 18. The process according to claim 15, wherein the first temperature is from about 120° C. to about 140° C. 19. The process according to claim 15, wherein the second temperature from about 100° C. to about 110° C. 20. The process according to claim 15, wherein the salt is present in an amount of from about 0.1% by weight to 3% by weight of the oxidized cellulose.
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