Information @ a Glance
- Lignins are abundant plant
biopolymers accounting for approximately 30% of the organic carbon in
the biosphere Lignin is nature’s most abundant biomass substance with
natural glue-like characteristics
- The potential supply of lignin is
virtually limitless
- Lignin contains no oil based
contaminants. Like magnesium chloride it is soluble in water. Further,
lignin is biodegradable
- The physical and chemical properties
differ depending on the extraction method. For example, lignosulfonates
are hydrophilic and will dissolve in water. These lignins are products
of sulfite pulping. Kraft lignins are hydrophobic and will not dissolve
in water. Kraft lignins are obtained from the Kraft pulping process.
Other technologies use an organic solvent or a high-pressure steam
treatment to remove lignins from plants
- Derivatives of lignins, such as
lignosulfonates, have many different industrial applications.
- applications are in food products,
serving as emulsifiers in animal feed and as raw material in the
production of vanillin. Lignin uses have expanded into literally
hundreds of applications - impacting on many facets of our daily lives.
administration to patients.
- Technology for the extraction of
lignin, a component of natural wood, from the chemicals used in the
pulping process is said to be available
- Lignin represents one of the
lowest-cost chemical
resources available on earth , depending on the
price of oil
- Many pulp mills could benefit from
recovering lignin in terms of production capacity and process
economics
- There are two principal categories of
lignin: those which are sulphur bearing and those which are
sulphur-free. It is the sulphur bearing lignins which have to date been
commercialized. These include lignosulphonates (world annual production
of 500,000 tons) and Kraft lignins (under 100,000 tons p.a.). Due to the
lack of suitable industrial processes, the sulphur-free lignins are as
yet non-commercialized.
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