METHOD OF BRIQUETTING OF HYDROLYSIS LEGNIN Russian patent published in 1999 - IPC

FIELD: processing of industrial dispersed waste, more particularly hydrolysis of vegetable stock and wood, and preparation of briquettes from industrial hydrolysis lignin. SUBSTANCE: method comprises pulping original product, neutralizing and enriching lignin pulp, dehydrating lignin pulp, drying dehydrated lignin compound and subsequently briquetting thereof. Enriched lignin pulp is dehydrated to form lignin plates having residual moisture content of not higher than 45%. The latter are then dried by exposing to electromagnetic high-frequency current field, disintegrated, and the resulting lignin compound is pressed to obtain briquettes. EFFECT: more efficient briquetting method. 3 cl