Quinone synthesized from an aromatic compound in an undivided el

Details Quinone synthesized from an aromatic compound in an undivided el Quinone synthesized from an aromatic compound in an undivided el

1994-05-02

1995-11-14

Niebling, John

Chemistry: electrical and wave energy

Processes and products

204 78, C25B 300, C25B 302

Patent

active

054663466

ABSTRACT:
A method for synthesizing quinone from an aromatic compound is developed that employs a paired electro-oxidation method and a undivided electrochemical cell. The electrolyte solution is a combination of an aromatic solution (aqueous or nonaqueous) and a redox mediator solution, which can be V.sup.5+ /V.sup.4+, Fe.sup.3+ /Fe.sup.2+, or Cu.sup.2+ /Cu.sup.+, in an undivided electrochemical cell. The electrolyte reaction is conducted by bubbling oxygen into the bottom of the cathode, then the oxygen is reduced to hydrogen peroxide (H.sub.2 O.sub.2). Simultaneously, at the anode surface, lower valence state ions can be oxidized to higher valence states. Hydrogen peroxide then oxidizes the rest of the low valence state ions to form high valence ions, OH-free radicals, and combinations of both. These ions and radicals then react with the aromatic compound in the solution and form the resultant product, quinone.

REFERENCES:
patent: 4950368 (1990-08-01), Weinberg et al.
Lee et al., "Mechanism and factors affected on the paired Electro-oxidation of anthracene to anthraquinone", Chem. Eng. Comm., vol. 123 (1993), pp. 179-193 (no month).
Hsiao et al., "Hydroxylation of chlorberzene and phenol in a packed bed blow reactor with electrogenerated Fenton's reagent", J. of Applied Electrochem., vol. 23 (1993 Sep.), pp. 943-946).
Jiin-Jian Jow, An-Chen Lee and Tse-Chuan Chou, "Paired electro-oxidation. I. Production of Benzaldehyde", Journal of Applied Electrochemistry 17 (1987) 753. (no month).
An-Cheng Lee and Tse-Chuan Chou, "Mechanism and Factors Affected on the Paired Electro-Oxidation of Anthrancene to Anthraquinone", Chem. Eng. Comm. 1993, vol. 123, pp. 179-193. (no month).

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