PROCESS FOR OBTAINING LOW MOLECULAR WEIGHT LIGNIN (LML)

摘要

Process for obtaining resin or synthetic material using lignocellulosic material by treating lignocellulosic material with an aqueous extraction solution with a content of a C1-4-alcohol of 70% v/v to 95% v/v at a pH of 12 to 14, where a first aqueous solution of low molecular weight lignin (LML) is obtained which is converted to resin or synthetic material; and a process for obtaining LML and a process for concentrating LML where the first aqueous solution of LML is used for treating further lignocellulosic material to obtain aqueous solutions in which the LML is enriched compared with the first aqueous solution.