Cellulose solution manufacturing method, cellulose precipitate manufacturing method, cellulose saccharification method, cellulose solution, and cellulose precipitate
First Claim
1. A cellulose solution manufacturing method comprising:
- providing a cellulose-containing material, wherein said cellulose-containing material comprises at least one of cotton, lyocell, rayon, and cupra;
contacting said cellulose-containing material with ozone to obtain an ozonated cellulose-containing material;
drying said ozonated cellulose-containing material at a temperature in the range of 50°
C. to 160°
C. to obtain a dried treated material;
mixing said dried treated material with a 1N to 5N sodium hydroxide aqueous solution to obtain a mixture; and
maintaining said mixture at a temperature of −
10°
C. to 50°
C. for 0.1 minute to 60 minutes to dissolve at least cellulose and obtain a cellulose solution comprising dissolved cellulose having a polymerization degree of 50 to 50,000.
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Accused Products
Abstract
The invention relates to a cellulose solution manufacturing method including: performing an ozonation treatment to bring a cellulose-containing material and ozone into contact with each other; and performing an alkali treatment to bring the obtained treated material and an alkali aqueous solution into contact with each other, thereby dissolving at least cellulose in the cellulose-containing material brought into contact with the ozone in the alkali aqueous solution. According to the invention, it is possible to provide a method of manufacturing a cellulose solution in which cellulose can be dissolved in a more simple manner, a method of manufacturing a cellulose precipitate in which cellulose can be recovered from the cellulose solution, and a method of saccharifying cellulose which uses the cellulose precipitate.
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Citations
9 Claims
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1. A cellulose solution manufacturing method comprising:
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providing a cellulose-containing material, wherein said cellulose-containing material comprises at least one of cotton, lyocell, rayon, and cupra; contacting said cellulose-containing material with ozone to obtain an ozonated cellulose-containing material; drying said ozonated cellulose-containing material at a temperature in the range of 50°
C. to 160°
C. to obtain a dried treated material;mixing said dried treated material with a 1N to 5N sodium hydroxide aqueous solution to obtain a mixture; and maintaining said mixture at a temperature of −
10°
C. to 50°
C. for 0.1 minute to 60 minutes to dissolve at least cellulose and obtain a cellulose solution comprising dissolved cellulose having a polymerization degree of 50 to 50,000. - View Dependent Claims (2, 3, 4, 6, 7, 8)
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5. The method of 4, wherein said acid aqueous solution has a pH from 1.0 to 6.9 and a concentration of acid from 1 wt % to 50 wt %.
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9. A cellulose solution manufacturing method comprising:
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providing a cellulose-containing material, wherein said cellulose-containing material comprises at least one of cotton, lyocell, rayon, and cupra; contacting said cellulose-containing material with ozone to obtain an ozonated cellulose-containing material; drying said ozonated cellulose-containing material at a temperature in the range of 50°
C. to 160°
C. to obtain a dried treated material;mixing said dried treated material with an aqueous solution consisting of 1N to 5N sodium hydroxide and water to obtain a mixture; and maintaining said mixture at a temperature of −
10°
C. to 50°
C. for 0.1 minute to 60 minutes to dissolve at least cellulose and obtain a cellulose solution comprising dissolved cellulose having a polymerization degree of 50 to 50,000.
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Specification