1. A method for producing solid lignin from lignin-rich starting material, especially lignin precipitate, characterized by
suspending the starting material in a first medium, which is acidic and aqueous, to form an aqueous acidic suspension having a consistency of 10-25 weight percent;heating the aqueous acidic suspension to a temperature in the...
CROSS REFERENCES TO RELATED APPLICATIONS
This application claims priority on Finnish Application No. 20155728, Filed Oct. 13, 2015, the disclosure of which is incorporated by reference herein.