Methods and products of oxidation of hydrolysis lignins
Abstract
Methods and products of oxidation of hydrolysis lignins
Incoming article date: 08.12.2020Lignin is a natural polymer material, one of the main components of wood and is a renewable resource. The current trends concerning the methods of oxidation of hydrolysis lignins and the use of oxidation products are considered. Lignin oxidation processes are mainly aimed at obtaining macromonomers with a high content of functional groups and at obtaining low molecular weight oxidation products. A significant group of research is associated with the development of processes for the production of polyols used for the synthesis of polyurethane foams. In view of the insolubility of hydrolysis lignins in acidic media, the reactions of their modification to obtain highly reactive polymeric ingredients are expediently carried out in acids. Electrochemical oxidation in acidic environments allows for multiple use of electrolytes and is energy-consuming to young.
Keywords: renewable resource, industrial waste, hydrolysis lignin, oxidized lignin, hydroxyl groups, macromonomers, low molecular weight products, chemical oxidation, catalysis, electrochemical method, resource saving