公开(公告)号：CA3062705A1

公开(公告)日：2018-11-15

申请号：CA3062705

申请日：2018-05-08

Applicant: FPINNOVATIONS

Inventor： PALEOLOGOU MICHAEL ,  AHMAD ZAID ,  XU CHUNBAO

IPC: C08J11/12 ,  C07G1/00 ,  C08H7/00

Abstract: The present relates to a process for the depolymerization of lignin using chemicals recoverable by the soda or kraft mill recovery cycles. The process involves the use of sodium hydroxide or white liquor to depolymerize lignin in black liquor or other lignins (e.g. hydrolysis lignin, kraft lignin) by conducting the reaction at 170-250 °C for up to 3 hours in the presence or absence of a co-solvent and a capping agent. The depolymerized lignin is then obtained by acidifying the reaction products to a low pH to precipitate the de-polymerized lignin, followed by particle coagulation, cake filtration and washing with acid and water to obtain a purified depolymerized lignin product.