ANTHRAQUINONE METHOD FOR PREPARING HYDROGEN PEROXIDE AND COMPOSITION FOR PREPARING HYDROGEN PEROXIDE Russian patent published in 2003 - IPC

FIELD: hydrogen peroxide production. SUBSTANCE: hydrogen peroxide is prepared by anthraquinone method using alternation of stages of hydrogenation and oxidation of mixture of alkyl- substituted anthraquinones and alkyl-substituted tetrahydroanthraquinones dissolved in at least one organic solvent. In this mixture, 10 to 55 mol % of alkyl-substituted anthraquinones and tetrahydroanthraquinones are substituted by amyl group. Molar ratio of alkyl-substituted tetrahydroanthaquinones to alkyl-substituted anthaquinones is at least 1:1. Preferably 50:1. 55 to 80 mol % of anthraquinones and tetrahydroanthraquinones are substituted by one ethyl group. Organic solvent can be one or more hydroquinone solvent from the group including alkyl phosphates, tetraalkylureas, cyclic urea derivatives, and alkyl-substituted caprolactams. Composition containing indicated mixture is essentially free of unsubstituted anthraquinone and tetrahydroanthraquinone. EFFECT: increased solubility of solution, enabled use of high concentrations, and increased resistance of solvent against side reactions during hydrogenation. 10 cl, 4 tbl, 4 ex