A method and an apparatus for recovering chemicals from a material of alkali lignin

摘要

In a method and apparatus for recovering chemicals from a material of alkaline lignin,The material of alkaline lignin (3) comprising NaOH or Koh is precipitated in the presence of an Acid in a stage of precipitation (6) to form a precipitate lignin (7),Lignin precipitated (7) is supplied to a phase separation (8) where lignin (9) is recovered and Purified from which at least one portion (10) comprising na or K are providedTra a crystallisation Stage (11).