| 摘要 |
A plant for producing hydrogen peroxide by auto-oxidation of an anthraquinone derivative, including a catalytic hydrogenation vessel (1) supplied with hydrogen; an oxidising vessel (2) supplied with an oxygen-containing fluid, particularly air; an extractor (3) supplied with water; and means (7, 16, 19) for successively feeding a working solution containing at least one anthraquinone derivative dissolved in at least one organic solvent through the hydrogenation vessel (1), the oxidising vessel (2) and the extractor (3), then recirculating it to the hydrogenation vessel (1). Means (9, 26) are provided for diverting at least part of the working solution from the extractor (3) to the oxidising vessel (2) so that it by-passes the hydrogenation vessel (1). The plant is useful for producing hydrogen peroxide in situ in a paper pulp bleaching plant.
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