Sucres d’hémicellulose

We are looking into ways to use the sugars (as well as lignin and organic acids) extracted from the wood during the pulping process, including entering into partnerships, to modify these extracts into higher value products for use in a wide variety of applications.

The biorefinery process for second generation hemicellulose sugars at Sappi involves recovering them from the prehydolysate liquor, and then separating them from the associated lignin and organic acids. There are various levels of processing and purification depending on end uses. The products we are targeting include sugar alcohols such as xylitol (a low energy sugar substitute), lactic acid (used in the production of polylactic acid (PLA), a renewable plastic), glycols (the main applications being for the production of PET for plastic bottles and unsaturated polyester resins and other products.

Second generation sugars are attractive because they do not compete with first generation sugars which are sourced from agricultural crops. This is extremely important because of a rapidly growing global population and worldwide pressure on agricultural resources. There is a strong, growing market demand for renewable biochemicals from non-food sources as companies intensify their search for ‘green’ products that offer enhanced sustainability and also offer product value chains with a lower carbon footprint, all of these aimed at a better quality of life for all.

In terms of sustainability, Sappi’s pulp mills have an advantage because the sugars are a co-product from an existing process and removing lignin and sugars can offer benefits in terms of pulp production efficiencies.

Sappi has commissioned the construction of a second-generation sugar extraction demonstration plant at Ngodwana Mill in Mpumalanga Province, South Africa. The demonstration plant will extract hemicellulose sugars and lignin from Sappi’s existing dissolving pulp line. The sugars platform will include beneficiation to higher value organic acids, glycols and sugar alcohols which find application in many everyday products.

New revenue opportunities include possibilities to extract biobased materials from the cooking plant prehydrolysate stream (such as hemicellulose sugars and lignin) for beneficiation to higher value biochemicals. These applications respond to the global demand for renewable materials with a lower carbon footprint.
Louis Kruyshaar, Executive Vice President of Sappi Biotech

Les progrès en matière de transformation du bois suivent la trajectoire d’une économie fondée sur les produits biologiques à base de matériaux renouvelables et biodégradables et qui ne mettent pas en péril les sources de nourriture.

Le procédé breveté de Sappi, élaboré avec l’Université Napier d’Édimbourg, réduit l’énergie requise pour transformer la fibre de bois en nanocellulose, améliorant ainsi la durabilité de notre produit.
Le lignosulfonate est un dérivé de la lignine très soluble et un produit issu du procédé de fabrication au bisulfite.

Le lignosulfonate peut être utilisé dans une grande variété d’applications.

Sappi s’emploie à produire de l’énergie verte conformément à son objectif stratégique de génération de valeur à partir d’opportunités du secteur de l’énergie et compte tenu des tendances favorisant la durabilité et l’efficacité.
La technologie est au cœur de nos activités; découvrez comment nous réalisons des progrès et des découvertes qui transforment notre quotidien.