FIELD: chemistry.
SUBSTANCE: invention relates to a method and apparatus for washing a suspension of crude lignin obtained by carrying out a method of containing soluble carbohydrates and use thereof, as well as a solid fraction and use thereof. Disclosed is a method of washing a suspension of raw lignin formed from a plant-based material, comprising separating fraction-containing soluble carbohydrates from a suspension of raw lignin obtained by treating lignocellulosic material formed from plant-based raw material, by enzymatic hydrolysis by means of using washing by displacement on at least one stage of separation of solid substance from liquid, where suspension of raw lignin is pressed, washed and compacted, and extraction of solid fraction and containing fractions containing carbohydrates. Disclosed also is a device for washing a suspension of raw lignin and obtained by implementing the disclosed method comprising a soluble carbohydrates fraction and a solid fraction.
EFFECT: technical result is the disclosed method enables more efficient separation of the obtained fractions and their separation from the crude lignin suspension.
20 cl, 5 dwg, 6 tbl, 7 ex
