A method for preparing C10-C18 long-chain naphthenes by utilizing furfural compounds and cyclic ketones
A C10-C18, cycloalkane technology, applied in the preparation of liquid hydrocarbon mixtures, hydrocarbons, hydrocarbons, etc., can solve problems such as serious equipment corrosion, and achieve low cost, mild reaction conditions, and easily available raw materials. Effect
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Embodiment 1
[0022] like figure 1 Shown is a synthetic reaction scheme for preparing long-chain naphthenes by using biomass-based furfural derivatives and cyclic ketones in the present invention.
[0023] Table 1 lists the Knoevenagel condensation reactions between different furfural compounds and cyclic ketones, and the yields of condensation products under different catalysts and reaction conditions.
[0024] Table 1 The results of Knoevenagel condensation reaction between furfural compounds and cyclic ketones under different conditions
[0025]
[0026] Table 2 lists the impact of hydrodeoxygenation reaction on the yield of long-chain naphthenes under different catalysts and reaction conditions; the reaction is carried out in a 100ml reactor, and 20ml of water is used as the reaction solvent; the product obtained by Knoevenagel condensation is selected as the reaction raw material , the concentration of the raw material is 10% by mass percentage; the loading amount of the active met...
Embodiment 2
[0030] Using furfural and cyclopentanone as raw materials, the preparation of C 10 -C 18 Long-chain naphthenes:
[0031] (1) Knoevenagel condensation reaction: at room temperature, weigh 19.2g furfural and 8.4g cyclopentanone (the molar ratio of furfural to cyclopentanone is 2:1), put them in a 250ml three-necked flask, mix them uniformly, and Slowly add 10ml of 1mol / L NaOH aqueous solution dropwise under the state, the reaction occurs rapidly and a large amount of yellow solid is generated, filter and wash the solid product with 5% ethanol aqueous solution, dry it in an oven at 50°C, and weigh to obtain 25.2g product. The NMR spectrum of the product is shown in the appendix figure 2 and 3 , the confirmed product is the condensation product of furfural and cyclopentanone 2,5-Bis-furan-2-ylmethylene-cyclopentanone, the structural formula is
[0032] (2) Preparation of metal / solid acid catalyst: Weigh 2g of solid zirconium phosphate and add it to 10ml of 5% palladium chlo...
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