Method for preparing bio-based phenol compounds through catalytic liquefaction on rice straw
A bio-based phenol and catalytic liquefaction technology, applied in the fields of environmental protection and bio-based chemicals, can solve problems such as hydrothermal liquefaction treatment that does not involve straw
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Embodiment 1
[0016] Using straw as raw material, first crush the straw, take 15g of straw powder and pour it into a 250mL high-pressure reactor, add 150mL of deionized water and 2g of activated copper-zinc-aluminum catalyst, stir to make a slurry, and fill the reactor with 1.2MPaH 2 , heated to 260°C while stirring, kept for 30min, passed tap water to cool to room temperature, and poured out the reaction mixture. After the solid-liquid separation of the product, the solid phase product was extracted with 100 mL of ethyl acetate, extracted and filtered; 10 mL of the aqueous phase product was extracted with 20 mL of ethyl acetate, extracted and separated. The extracted phases were diluted and quantified respectively, and the extracted phases obtained by liquid separation were qualitatively and quantitatively analyzed for phenolic compounds by gas chromatography-mass spectrometry (GC-MS). The yield of phenolic compounds was 13.83% ( relative to the quality of lignin in wood straw). The solid...
Embodiment 2
[0018] Using straw as raw material, first crush the straw, take 15g of straw powder and pour it into a 250mL high-pressure reactor, add 75mL of deionized water, 75mL of ethanol and 2g of activated copper-zinc-aluminum catalyst, stir to make a slurry, and fill the reactor with into 1.2MPaH 2 , heated to 300°C while stirring, kept for 30min, passed tap water to cool to room temperature, and poured out the reaction mixture. After the solid-liquid separation of the product, the solid phase product was extracted with 100 mL of ethyl acetate, extracted and filtered; 10 mL of the aqueous phase product was extracted with 20 mL of ethyl acetate, extracted and separated. The obtained extract phases were diluted and quantified respectively, and the extract phases obtained by liquid separation were qualitatively and quantitatively analyzed for phenolic compounds by gas chromatography-mass spectrometry (GC-MS). The yield of phenolic compounds was 28% ( relative to the quality of lignin in...
Embodiment 3
[0020] The solid residue obtained by the reaction was dried at 105°C, and the dried residue was put into a tube-type atmosphere furnace under air, 500 o C roasting for 1h; reactivate the roasted residue, use hydrogen to remove the air in the tube first, the activation temperature is 300°C, the heating rate is 1°C / min, the hydrogen flow rate is kept at 60mL / min, and the activation time is 2h. After the activation process is completed, wait for the temperature to cool down to room temperature and take it out. Using straw as raw material, first crush the straw, take 15g of rice straw powder and pour it into a 250mL autoclave, add 75mL of deionized water, 75mL of ethanol and the solid residue after the activation of the above-mentioned roasting, stir to make a slurry, and fill the reaction kettle with 1.2MPaH 2 , heated to 300°C while stirring, kept for 30min, passed tap water to cool to room temperature, and poured out the reaction mixture. After the solid-liquid separation of ...
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