Method for converting lignocellulose into phenolic compounds, polyols and organic acids by one-pot process
A technology of lignocellulose and phenolic compounds, applied in lignin derivatives, chemical instruments and methods, organic chemistry, etc., can solve the problems of high energy consumption, low catalytic efficiency, difficult recovery of catalysts and waste liquid, etc. Effects of excessive oxidative degradation
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Embodiment 1
[0032] (1) Deoxygenation of the reaction system
[0033] Add 1 g of dry eucalyptus powder (particle size of 40-60 mesh) and 2 g of CuO into a reaction kettle containing 10 mL of 2 mol / L NaOH aqueous solution, and then the mixture is ultrasonically deoxygenated. After the treatment, the reactor was sealed, and the reactor was purged with nitrogen for 3 times, and nitrogen was continued to make the internal pressure of the reactor 0.2 MPa.
[0034] (2) One-pot conversion of lignocellulose
[0035] Heat the sealed reactor in step (1) to 210 °C, react at this temperature for 40 min, and cool down to room temperature quickly after the reaction, then filter and separate the solid-liquid mixture in the reactor to obtain alkaline solution, Cu 2 O and Cu elemental residual solids.
[0036] (3) Acidification treatment of the product
[0037] Use SO 2 Adjust the pH of the obtained alkaline solution to 2 to obtain an acidified solution containing phenolic compounds and organic acids. ...
Embodiment 2
[0039] The reaction temperature in step (1) of Example 1 was replaced by 150°C, the reaction time was replaced by 10 h, and other operations were the same as in Example 1.
Embodiment 3
[0041] Replace the reaction temperature in step (1) of Example 1 with 350°C and the reaction time with 10 s, and other operations are the same as in Example 1.
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