Preparation method of solid acid catalyst used for biomass hydrolysis
A solid acid catalyst and biomass technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems that catalysts cannot be recycled, the demand for chemical reagents is large, and the cost of cellulase is high. Good catalytic effect, low price, high hydrolysis strength
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Embodiment 1
[0024] Weigh 100g of pine wood chips, put them in an oven after cleaning, and dry them at a temperature of 105°C until they reach a constant weight; put the dried sawdust into a closed reactor, and react for 5 hours under nitrogen protection and a reaction temperature of 450°C , to obtain a black powder, cooled to room temperature; get 20g of black powder and 400ml of fuming sulfuric acid (SO 3 15wt%) was placed in a three-necked flask, reacted for 20h under the conditions of nitrogen protection, stirring and 80°C reaction temperature, until the reaction solution reached the maximum acidity constant value, cooled to room temperature, filtered to remove black solid powder, and used Wash with deionized water until no ions are detected, and then dry; take the dried black solid powder and place it in a three-necked flask, add a sufficient amount of CuCl 2 The solution was protected by nitrogen gas, and stirred in a water bath at 30°C for 20 hours. After the reaction was completed...
Embodiment 2
[0028] Weigh 100g of sweet sorghum stalks, put them in an oven after cleaning, and dry them at a temperature of 105°C to constant weight; put the dried sawdust into a closed reactor, and react under nitrogen protection and a reaction temperature of 400°C After 10 hours, a black powder was obtained and cooled to room temperature; 20 g of the black powder and 400 ml of concentrated sulfuric acid were placed in a three-necked flask, and reacted for 1 h under the conditions of nitrogen protection, stirring and a reaction temperature of 200 ° C, cooled to room temperature, and filtered to remove the black The solid powder is washed with deionized water until no ions are detected, and then dried; the dried black solid powder is placed in a three-necked flask, and a sufficient amount of K 2 SO 4 The solution was protected with nitrogen gas, and stirred in a water bath at 80°C for 5 hours. After the reaction was completed, it was suction filtered and washed with deionized water until ...
Embodiment 3
[0032] Weigh 100g of microcrystalline cellulose, put it in an oven after cleaning, and dry it at a temperature of 105°C until it reaches a constant weight; put the dried sawdust into a closed reactor, under the conditions of nitrogen protection and a reaction temperature of 600°C React 1h, obtain black powder, be cooled to room temperature; Get the oleum of 20g black powder and 400ml (SO 3 15wt%) was placed in a three-necked flask, reacted for 10 h under nitrogen protection, stirring and a reaction temperature of 90° C., cooled to room temperature, filtered to remove black solid powder, and washed with deionized water until no ions were detected. Then dry; take the dried black solid powder and place it in a three-necked flask, add a sufficient amount of Na 2 SO 4The solution was protected by nitrogen gas, and stirred in a water bath at 60°C for 1 hour. After the reaction was completed, it was suction-filtered and washed with deionized water until no ions were detected, and t...
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