Assertion: free lignin | /r/HasProperty | produced on other hand
Facets:
value: from three sources
type: OTHER
Source sentences:
text: On the other hand, sulfur-free lignins are produced from three sources: 1) conversion processes for biomass that are mainly oriented toward the production of biofuels; 2) pulping using solvents, such as mixtures of acid-alcohol-water and ionic liquids; and 3) particular raw materials, such as agricultural residues (Lora and Glasser 2002).