| abstract |
(57) [Summary] [Structure] Water or an eluent composed of water and an organic solvent is continuously added to a column packed with a sodium-type or neutral salt-type cation exchange resin or a hollow-type ion exchange resin membrane thereof. Flow-in, injecting hydroquinone from the upper part, oxidizing the hydroquinone by the fixed cations in the cation exchange resin, and recovering the quinone from the lower part. [Effect] Quinone, which is useful as a raw material for the synthetic organic chemical industry, can be easily produced in high yield. |