Method for preparing C5-C25 alkane from furfuryl alcohol
A technology of C5-C25 and furfuryl alcohol, which is applied in the field of preparing C5-C25 alkanes, can solve the problems of high oxygen content of levulinic acid and many reaction steps, and achieve the effects of simple operation procedure, mild reaction conditions and simple process
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Embodiment 1
[0027] Get 168g of furfuryl alcohol, 150g of water, 119g of sulfuric acid solution with a mass fraction of 3%, add it to a 500ml beaker, stir evenly with a glass rod, and let it stand for 3 hours at a constant temperature of 70°C under nitrogen protection conditions to obtain the upper light yellow water layer and The lower dark brown oil layer has a mass of 138g. Separate the upper liquid, add 237g of absolute ethanol to the lower oil layer, stir evenly, add to a 1L autoclave, weigh 9.8g of Raney nickel and add to the autoclave. The hydrogen in the kettle was pressurized to 6.4MPa, the temperature was raised to 150°C, the stirring speed was 600r / min, and the reaction was carried out for 3 hours. After complete cooling, samples were taken and analyzed by gas-mass spectrometry. The main product was C5-C20 tetrahydrofuran-type organic compounds. Ethanol was evaporated from the preliminary hydrogenation product, and 230g tetrahydrofuran was added to the autoclave, and then 30gPt ...
Embodiment 2
[0029] Weigh 172g of furfuryl alcohol, 153g of water, and 122g of sulfuric acid solution with a mass fraction of 3%, add it to a 500ml beaker, stir evenly, and let it stand for 3 hours at a constant temperature of 70°C under the protection of nitrogen to react for 3 hours to obtain the upper light yellow water layer and the lower layer. A dark brown oil layer, wherein the weight of the oil layer is 130g. Separate the upper liquid of the reaction, add 245g of tetrahydrofuran to the lower liquid, stir evenly, add it into the autoclave, weigh 10g of Raney nickel and add it into the autoclave. The hydrogen gas was pressurized to 6.2MPa, the temperature was raised to 150°C, the stirring speed was 600r / min, and the reaction was carried out for 3 hours. After complete cooling, add 30gNiMo / Al to the kettle 2 o 3 , the hydrogen pressure was increased to 8.5MPa, and the temperature was raised to 250°C, the stirring speed was 600r / min, and the reaction was carried out for 3 hours. Unl...
Embodiment 3
[0031] Weigh 168g of furfuryl alcohol, 150g of water, and 110g of sulfuric acid solution with a mass fraction of 3%, and add them to a 500ml flask, mix well, and reflux at 110°C for 20 minutes under the protection of nitrogen, and divide into a water layer and an oil layer, and the oil layer has a mass of 150g. Separate the upper liquid of the reaction, add 230g of tetrahydrofuran to the lower liquid, stir evenly, add it into the autoclave, weigh 9.5g of Raney nickel, and add it into the autoclave. The hydrogen gas was pressurized to 6.0MPa, the temperature was raised to 120°C, the stirring speed was 600r / min, and the reaction was carried out for 3 hours. After complete cooling, add 28g Pt / SiO to the kettle 2 -Al 2 o 3 , the hydrogen pressure was increased to 8.0MPa, and the temperature was raised to 250°C, the stirring speed was 600r / min, and the reaction was carried out for 3 hours. The carbon number distribution of the product is shown in Table 1.
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