MULTICOMPONENT SYSTEM FOR MODIFYING, DECOMPOSING, AND BLEACHING LIGNIN, LIGNIN-CONTAINING MATERIALS, OR ANALOGOUS MATERIALS, AND A METHOD FOR APPLYING THIS SYSTEM Russian patent published in 2000 - IPC

FIELD: paper-and-pulp industry. SUBSTANCE: system contains at least one oxidation catalyst, at least one corresponding oxidant, and at least one mediator. The latter is selected from group of compounds including hydroxypyridines, aminopyridines, hydroxyquinolines, aminoquinolines, hydroxyispquinolines, and aminoisoquinolines with nitroso or mercapto substituents in ortho- or para-positions to hydroxy or amino groups, tautomers of indicated compounds, and also their salts, esters, and ethers. Lignin is treated with such system simultaneously or in any succession when mixing with aqueous suspension of lignin-containing material. EFFECT: accelerated delignification and improved environmental condition. 7 cl, 1 tbl, 7 ex