Application of a Polyacid Catalyst in Cellulose Hydrolysis
An acid catalyst, catalyst technology, applied in the direction of physical/chemical process catalyst, application, organic compound/hydride/coordination complex catalyst, etc., can solve problems such as less research
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Embodiment 1
[0018] Weigh the polyacid compound H with a molar ratio of 1:2 6 [P 2 W 18 o 62 ]·6H 2 O and surfactant [C 16 h 33 (CH 3 ) 3 N]Br; the polyacid compound H 6 [P 2 W 18 o 62 ]·6H 2 Pour O into the reactor, add distilled water with a mass ratio of 10 times, heat to 50°C, stir and dissolve; then add surfactant to it, age the reaction solution for 6 hours, precipitate solids, filter, and wash the precipitate with distilled water 3 times until the pH value of the eluate reaches 7.3 to obtain a precipitate; the precipitate is placed in a mug kettle and sintered at 160° C. for 2 hours to obtain a polyacid catalyst for the preparation of glucose. Its yield was 84%.
[0019] The structure of the solid catalyst was determined by infrared spectroscopy (see figure 1 ), 31 PMASNMR (see figure 2 )Sure.
Embodiment 2
[0021] Cellulose powder 0.1g, 0.09mmol [C 16 h 33 (CH 3 ) 3 N]H 5 [P 2 W 18 o 62 ]·6H 2 The catalyst of O was put into the reactor, and 7 mL of deionized water was added, heated and stirred. The reaction temperature is 160° C., and the reaction time is 8 hours. After the reaction is finished, put the reaction mixture into a centrifuge tube for centrifugation after cooling. Glucose is contained in the supernatant, and unreacted cellulose and catalyst are contained in the precipitate. The conversion rate of cellulose was 64.0%, and the yield of glucose was 49.6%. Infrared images of recovered catalysts such as figure 1 As shown in b).
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