Preparation of furan compounds

Details Preparation of furan compounds Preparation of furan compounds

1980-03-07

1981-05-19

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

26034611, B01J 2710, B01J 2708, C07D30736

Patent

active

042684218

ABSTRACT:
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.

REFERENCES:
patent: 3328469 (1967-06-01), Spector
patent: 3544642 (1970-12-01), Oppegaard
patent: 4048216 (1977-09-01), Wadden
patent: 4096171 (1978-06-01), Benzie et al.
patent: 4172838 (1979-10-01), Garnett et al.

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