Full component separation for cell wall of agricultural refuse
A technology for the separation of agricultural waste and its separation method, which is applied in the field of separation of all components of cell walls in agricultural waste. It can solve the problems of low reactivity, incomplete structure of cellulose, and difficulty in further utilization, so as to shorten the separation time and increase the yield. , The effect of eliminating secondary environmental pollution
Examples
Embodiment 1
[0029] (1) Dried wheat stalks were cut into small pieces, ground, and the part that passed through a 5mm sieve was taken, placed in an oven at 50°C to keep air circulation and dried for 16 hours, and then heated with 2% H at 45°C and pH 14. 2 o 2 After processing for 6 hours, filter to obtain undissolved matter 1 and filtrate 1; undissolved matter 1 is crude cellulose, which still contains a relatively large amount of hemicellulose and lignin;
[0030] (2) Use 2.5% H at 45°C and pH 14 2 o 2 Treat undissolved matter 1 for 7 hours, filter to obtain undissolved matter 2 and filtrate 2; use 80% acetic acid-8% HNO at 110°C 3 Treat undissolved matter 2 (solid-liquid ratio 1:10, g / ml) for 40 minutes, filter to obtain undissolved matter 3 and filtrate 3, undissolved matter 3 is cellulose; filtrate 3 is concentrated to recover acetic acid and nitric acid, and the residue It is a mixture of a small amount of phenol, aldehyde and acid;
[0031] (3) After mixing filtrate 1 and filtrat...
Embodiment 2
[0035] (1) The bagasse is cut into small pieces after being dried in the sun, ground, and the part passing through the 8mm sieve is taken, placed in a 60°C oven to keep the air circulation dry for 12h, and then heated with 1.5% H at 65°C and pH 12.5. 2 o 2 After processing for 6 hours, filter to obtain undissolved matter 1 and filtrate 1; undissolved matter 1 is crude cellulose, which still contains a relatively large amount of hemicellulose and lignin;
[0036] (2) Use 1.5% H at 65°C and pH 12.5 2 o 2 Treat undissolved matter 1 for 8 hours, filter to obtain undissolved matter 2 and filtrate 2; use 80% acetic acid-8% HNO at 130°C 3 Treat undissolved matter 2 (solid-liquid ratio 1:8, g / ml) for 20 minutes, filter to obtain undissolved matter 3 and filtrate 3, undissolved matter 3 is cellulose; filtrate 3 is concentrated to recover acetic acid and nitric acid, and the residue It is a mixture of a small amount of phenol, aldehyde and acid;
[0037] (3) After mixing filtrate 1 ...
Embodiment 3
[0041] (1) After drying, the rice straw was cut into small pieces, ground, and the part that passed through the 6mm sieve was taken, and placed in an oven at 55°C to keep the air circulation dry for 14h, and then heated with 2% H at 50°C and pH 12. 2 o 2 Treat for 8 hours, filter to obtain undissolved matter 1 and filtrate 1; undissolved matter 1 is crude cellulose, which still contains a relatively large amount of hemicellulose and lignin;
[0042] (2) Use 2.5% H at 55°C and pH 12.5 2 o 2 Treat undissolved matter 1 for 6 hours, filter to obtain undissolved matter 2 and filtrate 2; use 80% acetic acid-8% HNO at 120°C 3 Treat undissolved matter 2 (solid-to-liquid ratio 1:12, g / ml) for 20 minutes, filter to obtain undissolved matter 3 and filtrate 3, undissolved matter 3 is cellulose; filtrate 3 is concentrated to recover acetic acid and nitric acid, and the residue It is a mixture of a small amount of phenol, aldehyde and acid;
[0043] (3) After mixing filtrate 1 and filtr...
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Description
Claims
Application Information
- IPC
- D21C5/00; C08B37/14; C08H7/00
- Inventors
- 孙润仓; 刘传富