Preparation method of furfural and levulinic acid
A technology of levulinic acid and furfural, which is applied in the field of preparation of furfural and levulinic acid, can solve the problems of difficult furfural and levulinic acid, and achieve the effect of recycling
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[0023] The embodiment of the present invention discloses a preparation method of furfural and levulinic acid, comprising the following steps:
[0024] In the water and organic phase system, the agricultural and forestry wastes are subjected to a high-temperature reaction under the action of an acid catalyst to obtain a reaction liquid rich in levulinic acid; then the reaction liquid is mixed with the agricultural and forestry wastes for a low-temperature reaction to obtain furfural and levulinic acid.
[0025] The present application uses acid as a catalyst to convert agricultural and forestry wastes in a water and organic phase system through a two-step process, and finally obtains furfural and levulinic acid with relatively high yields at the same time.
[0026] In the process of preparing furfural and levulinic acid, the application is the conversion of agricultural and forestry wastes in the water and organic phase system. The agricultural and forestry wastes are well kno...
Embodiment 1
[0042] Take 3.3g of dry corn stalk powder screened through a 40-mesh sieve, 10mL of distilled water, 40mL of γ-valerolactone (GVL), add 98% concentrated sulfuric acid drop by drop to make the sulfuric acid concentration of the reaction solution 0.1M, mix well and add to the high-temperature reactor Middle; adjust the high-temperature reactor so that the temperature rises to 180°C at a heating rate of 8-10°C / min, and the retention time after reaching the set temperature is 90 minutes. The reaction solution is mixed with 3.3g of new raw material dry corn stalk powder and then enters the low-temperature reactor. Adjust the low-temperature reactor to raise the temperature to 130°C at a heating rate of 8-10°C / min. After reaching the set temperature, the retention time is 90min. After the reaction, quickly cool down the low-temperature reactor, filter the reaction solution and residue, sample the reaction solution for detection, and the reaction residue enters the next cycle of high-...
Embodiment 2
[0045] Take 3.3g of dried corn stalk powder screened through a 40-mesh sieve, 10mL of distilled water, and 40mL of γ-valerolactone (GVL), add 98% concentrated sulfuric acid dropwise to make the sulfuric acid concentration of the reaction solution 0.2M, mix well and add to the high-temperature reactor Middle; adjust the high-temperature reactor so that the temperature rises to 180°C at a heating rate of 8-10°C / min, and the retention time after reaching the set temperature is 90 minutes. The reaction solution is mixed with 3.3g of new raw material dry corn stalk powder and then enters the low-temperature reactor. Adjust the low-temperature reactor to raise the temperature to 130°C at a heating rate of 8-10°C / min. After reaching the set temperature, the retention time is 90min. After the reaction, quickly cool down the low-temperature reactor, filter the reaction solution and residue, sample the reaction solution for detection, and the reaction residue enters the next cycle of hig...
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