Lignin Commercial Products

Lignin Commercial Products. Lignin has numerous applications across a variety of industries including automotive construction coatings plastics and pharmaceuticals Refined lignin can replace fossilbased phenols that are used in resins for plywood oriented strand board (OSB) laminated veneer lumber (LVL) paper lamination and insulation material.

PropertiesSynthesisCommercial Lignin ProductsApplicationsLignin is the second most abundant renewable biopolymer found in nature with celluose being the most abundant It is a relative complex compound having a crosslinked phenolictype structure which does not easily breakdown Due to its aromatic structure it is more chemically stable and heat resistant than cellulose Lignin is of vital importance as a structural material in wood and can account for up to 40 % of the dry biomass1It is basically the aromatic part of the wood “composite” that acts like an adhesive in plant cell walls and provides rigidity to the wood It also prevents rapid break down of the cellulosic material since it is mostly found between cells but also within the cells itself Lignin is a crosslinked biopolymers with a moderately high molecular weights of more than 5000 g/mol (weight average2) The true degree of polymerization is difficult to measure since the polymer tends to fragment during extraction The extract consists of various types of lignins depe Lignin is a byproduct of the bleaching process of wood pulp The goal of this process is to remove all or most of the lignin in the wood pulp because residual lignin in cellulosic materials has a negative impact on the cellulose properties Thus it has to be modified degraded or completely removed from the cellulose to produce high quality paper products The pulping process usually includes following steps 1) debarking and chipping 2) mechanical and/or chemical separation of the wood fibers by grinding refining or digestion (cooking) to dissolve the lignin 3) removal of discoloration (primarily residual lignin) by bleaching and 4) cellulose processing and paper manufacture To remove lignin and hemicellulose and to produce high quality cellulose the wood pulp is treated with a alkali sulfite or bisulfite at temperature above 130°C in a large pressure cooker the so called digester which hydrolysis the lignin and makes it water soluble (sulfite process) A competing chemical Today high quality lignin is commercially available in large quantities which is converted to numerous other raw materials which have been fractionated purified chemically modified (functionallized) The most important types of lignin include soda ligninKraft lignin hydrolyzed lignin organosolv lignin and lignosulfonates Major manufacturers of these products are Alberta Pacific Borregaard LignoTech CIMV Domtar Domsjö Tembec UPM and Weyerhaeuseramong several other companies Lignin based materials are used on a much smaller scale than cellulosic materials However sales of lignin and its derivatives have steadily grown Lignosulfonates are the most important pulping byproducts of the sulfite process They are used as additives in many products such as oil well drilling fluids (rheology modifier) concretes (strength aid superplasticizer retarder) drywalls (water reducing agent) agricultural chemicals and animal feed (binder) Lignosulfonates are also used as dispersant agents (dyes) complexing agents and emulsifying agents One of the most important applications of Lignin derivatives (lignosulfonates) is the production of oriented strand fiber and particle boards Lignin derivatives are added to many wood glues such as phenolformaldehyde ureaformaldehyde melamineformaldehyde resorcinolformaldehyde and taninformaldehyde resins They are mainly added to reduce raw material cost Kraft ligninis the main byproduct of the Kraft pulping proc.

Lignin products – Metgen

METNIN™ Lignin Refining Technology allows removing the complexity of lignin molecule With the power of biotechnology METNIN™ breaks down any type of lignin gently and affordably into specific fractions METNIN™ fractions are tailored to enduser needs and have the chemical characteristics required for the final applications METNIN™ Products include intermediate lignin fractions for endless uses for aromatics as well as readytouse formulations for industrial materials and chemicals.

Industrial Commercial Lignins: Sources, Properties and

We observed that the technical ligninbased commercial products utilize coarse properties of the technical lignin in marketed formulations Additionally the general principles of polymers chemistry and selfassembly are difficult to apply in ligninbased nanotechnology and lignincentric investigations must be carried out Author Adam Ekielski Pawan Kumar MishraCited by Publish Year 2020.