Papers Proceedings »
KRAFT LIGNIN ISOLATION VIA AN ECO-FRIENDLY TECHNIQUE
The lignocellulosic material is one of the most abundant renewable resources. Its main components are cellulose, hemicellulose and lignin. Paper, food, adhesives, additives, flavors, biodegradable polymers and pharmaceutical are some examples of the developing areas for the lignocellulosic components. Therefore, the integral use of it is becoming more and more important. The IEA (International Energy Agency) define biorefining as “the sustainable processing of biomass into a spectrum of marketable products and energy”. Lignin has a huge potential in biorefinery, however, one of the challenges to process it is characterization and its isolation. In this work, an eco-friendly technique to isolate lignin from black liquor from Kraft pulping mill of three different wood species is presented. The effect this technique presents in the chemical structure and physicochemical properties is studied. Chemical structure characterization was performed by Fourier Transform Infrared Spectroscopy and the physicochemical characterization was determined by the following properties: solubility, electrical conductivity and calorific heat value. The results indicate that the proposed technique represents a good option to obtain lignin for biorefining purposes.