METHOD AND SYSTEM FOR LIGNIN PROCESSING Russian patent published in 2018 - IPC C07G1/00 D21C11/00 C01B31/02 C08K3/04 C10L5/44 C10L9/08 

FIELD: chemistry.

SUBSTANCE: method of separating lignin from lignin-containing medium, such as liquid made in the method of processing biomass, for example, from a black alkaline solution produced in the enterprise of recycling of pulp, and processing the separated lignin, includes: the precipitation of lignin from lignin-containing liquid medium, followed by exposure of lignin hydrothermal carbonization in the wet state and the removal of carbonaceous material derived from lignin as a result of the carbonization after the implementation of the hydrothermal carbonization, the method further includes: the regulation of the particle size of the carbonaceous material by bringing the pH value of lignin in the wet state before the hydrothermal carbonization to a value exceeding 7, preferably exceeding 8. The system, a carbon-containing product and the application of the product are also declared.

EFFECT: obtaining a hydrocarbon product with a controlled particle size and increasing the profitability of the process.

17 cl, 2 dwg