Preparation of furan compounds

Details Preparation of furan compounds Preparation of furan compounds

B - Operations, Transporting

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252/64, 260/367.

B01J 31/28 (2006.01) C07D 307/34 (2006.01) C07D 307/36 (2006.01)

Patent

CA 1141361

ABSTRACT OF THE DISCLOSURE A process for preparing a furan compound by the catalytic oxidation of a diolefin such as butadiene or a halo-substituted alkene is provided. In this process, the starting material is contacted with an aqueous medium having a pH less than about 2 containing (1) iodide ion, (2) a mixture of cuprous and cupric ions, and (3) a solubilizing agent for cuprous ion such as an alkali metal halide. Optionally, an oxygen- containing gas such as air can also be contacted with the aqueous medium. In one embodiment, the starting material is contacted with an aqueous solution of the aforesaid ingredients in one reaction zone to prepare furan and a portion of the solution is passed to a second reaction zone where cuprous ion is oxidized to cupric ion with air and then the air-treated solution returned to the first reaction zone.

333929

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