Process method for pretreating cellulose by using ionic liquid to completely convert cellulose into water-soluble sugar
A technology of ionic liquids and water-soluble sugars, applied in chemical instruments and methods, organic chemistry, sugar derivatives, etc., to achieve high efficiency, thorough treatment, and environmental reusability
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[0024] Example 1
[0025] This example illustrates at 150 o Under C, the ionic liquid is selected as [BMIM]Cl and the mass of cellulose is 10.0% of the mass of ionic liquid. The process of pre-treating cellulose to obtain water-soluble sugar
[0026] The cellulose was dried in a blast drying oven at 110°C for 24 hours. Add 5.000 g of ionic liquid to a 100 ml round bottom flask, place it in an oil bath at 150°C, and purge with nitrogen for 60 min during the stirring process. 0.500g of cellulose was added and stirring was continued to dissolve the cellulose into the ionic liquid to form a transparent homogeneous solution. After the conversion, the heating was stopped, and 30 ml of ethanol was quickly added to the flask to precipitate the unconverted cellulose and water-soluble sugars in solid form. After filtering and washing 3 times, an ethanol solution of ionic liquid was obtained. Finally, the precipitated solid is dissolved in deionized water and filtered to obtain water-solub...
Example Embodiment
[0028] Example 2
[0029] This example illustrates at 150 o Under C, select the ionic liquid to be [Mmim][DMP], the cellulose mass is 10.0% of the mass of the ionic liquid, the process of pre-treating cellulose to obtain water-soluble sugars
[0030] The cellulose was dried in a blast drying oven at 110°C for 24 hours. Add 5.000 g of ionic liquid to a 100 ml round bottom flask, place it in an oil bath at 150°C, and purge with nitrogen for 60 min during the stirring process. 0.500g of cellulose was added and stirring was continued to dissolve the cellulose into the ionic liquid to form a transparent homogeneous solution. After the conversion, the heating was stopped, and 30 ml of ethanol was quickly added to the flask to precipitate the unconverted cellulose and water-soluble sugars in solid form. After filtering and washing 3 times, an ethanol solution of ionic liquid was obtained. Finally, the precipitated solid is dissolved in deionized water and filtered to obtain water-solub...
Example Embodiment
[0032] Example 3
[0033] This example is explained in 140 o Under C, the ionic liquid is selected as [Mmim][DMP] and the mass of cellulose is 5.0% by mass of the ionic liquid, the process of pre-treating cellulose to obtain water-soluble sugar
[0034] The cellulose was dried in a forced air drying oven at 90°C for 24 hours. Put 5.000 g of ionic liquid into a 100 ml round bottom flask, place it in an oil bath at 140°C, and purge with nitrogen for 90 min during the stirring process. Add 0.250 g of cellulose and continue to stir to dissolve the cellulose in the ionic liquid to form a transparent homogeneous solution. After the conversion, 30ml of ethanol was quickly added to the flask to precipitate the unconverted cellulose and water-soluble sugars in solid form, and filtered to obtain an ethanol solution of ionic liquid. Finally, the precipitated solid is dissolved in deionized water and filtered to obtain water-soluble sugar; the ethanol solution of the ionic liquid is rotary ...
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