FIELD: recovering of paint from waste paper pulp.
SUBSTANCE: method involves regulating proportion of organic material in the form of fibrous material in paint pulp at the level of 15-40% on conversion to solid substance content; regulating water content in paint pulp so that solid substance content becomes 10-35%; increasing pressure of pumped-through paint pulp to at least 22 MPa; increasing temperature to supercritical value; adding oxygen-containing medium to paint pulp; recuperating energy released upon oxidizing of organic material; separating material flow, from which energy had been withdrawn and which contains said inorganic material, gas, water. Material separation process involves extraction of valuable inorganic material.
EFFECT: increased efficiency by extracting of high-quality inorganic material from paint pulp.
22 cl, 1 dwg
