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Lignin separation with LignoBoost

Valmet’s LignoBoost process makes it possible to extract lignin from pulp mill black liquor. The extracted lignin is an excellent biofuel with high heating value. It also functions as the starting material for plastics, fiber composites, technical carbons and much more. This means new possibilities and new revenues for pulp mills.

A new source of income for pulp mills

Increased pulp production

The LignoBoost process takes place in a compact stand-alone plant that can be integrated with an existing pulp mill without interfering with normal production. In the process, lignin is extracted from pulp mill black liquor and the lignin-lean liquor is returned to the chemical recovery. By extracting 25% of the lignin in the pulp mill black liquor, the recovery boiler is off-loaded to enable 20-25% more pulp production.

Lignin – an excellent raw material for bio-based products

In addition to increased pulp production, green energy produced from lignin can be profitably exported as process steam or power, or simply sold or used as fuel.
Besides refining lignin into transportation fuels such as gasoline, diesel and jet fuel, lignin is also an outstanding raw material for further processing into base chemicals like phenols. The end result is bio-based materials and products including plastics, binders, fiber composites and technical carbons. To sum up, lignin is a material with great possibilities.

Full-scale LignoBoost plants in operation

Valmet provides LignoBoost on an industrial scale and today there are two fullscale LignoBoost plants in operation. The LignoBoost process can be integrated with existing pulp mills regardless of geographical location. Valmet’s process engineers and service organization is committed to help you – and with 130 locations in 33 countries we are always close by.

Lignin – an outstandning biofuel for boilers

Using lignin as a fuel in a lime kiln can save as much as 50 liters (13 US gallons) of fuel oil per tonne of pulp. For a mill with an annual production of 500 000 tonnes of pulp the potential savings are 25 000 m3 (6.6 million US gallons) of fuel oil.