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ChemicalBook CAS DataBase List Furan
110-00-9

Furan synthesis

11synthesis methods
Furfural is oxidized into 2-furan formic acid which undergoes decarboxylation to obtain furans. Heat the 2-furan formic acid to 200-205 ℃ (around the boiling point) so it is decomposed into carbon dioxide and furans. During the reaction process, send the sublimated 2-furan formic acid back to the reactor with the distilled furan undergoing re-distillation; collect the distillation fraction of 31-34 ℃ which is the relative pure finished product with the overall yield being about 75%. Industrially, it can be obtained through direct decarbonylation of furfural. The catalyst used in the reaction includes aluminum silicate, metal oxides or hydroxides as well as the mixtures of alloy or metals such as the mixture of zinc chromite and manganese. The reaction temperature should be about 400 ℃ with the yield being 90%. For large-scale production, the yield can be 74%.
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Yield:110-00-9 48% ，534-22-5 11% ，71-36-3 7% ，120-92-3 7% ，109-99-9 10%

Reaction Conditions:

with nickel supported catalyst in methanol;water at 260; under 7500.75 Torr; for 4 h;Inert atmosphere;Autoclave;Reagent/catalyst;

Steps:

2
2 g of furfural,10g water,36 g of methanol and 0.5 g of catalyst into a 100 mL autoclave,To the reactor charge and discharge N2 three times,To purge the air in the reactor,And then continue to fill N2 to make the initial pressure within the kettle to 1MPa.The autoclave was heated to 260 ° C at a heating rate of 3 ° C / min,And stay at this temperature for 4h,After the reaction, the reaction vessel was transferred to cold water and cooled to room temperature (cooling rate of about 10 ° C / min)The gas and liquid products in the autoclave were quantitatively analyzed when the temperature of the reactor was stable.The results showed that the conversion rate of furfural was 95% under the catalyst and reaction conditions,Furan yield reached 52%Methyl furan yield of 29%The yield of cyclopentanone was 4%Butanol yield of 7%The yield of tetrahydrofuran was 1%The other components were yielded at 2%.

References:

Chinese Academy Of Sciences Process Engineering Institute;Wang Ze;Fu Chaolin;Song Wenli;Lin Weigang;Li Songgeng CN106496165, 2017, A Location in patent:Paragraph 0045-0046

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