Valorization of some lignocellulosic agro‐industrial residues to obtain biopolyols

Abstract

BACKGROUND: The valorization of renewable and abundant resources (date seed, olive stone, corncob, rapeseed cake and apple pomace) from agro-industrial activities was performed by mild liquefaction using polyhydric alcohols to obtain biopolyols that constitute an attractive choice for polyurethanes and other industrial sectors.

The Study on Application of Biopolyols Obtained by Cellulose Biomass Liquefaction Performed with Crude Glycerol for the Synthesis of Rigid Polyurethane Foams

“…bio-polyols, which can be subsequently incorporated into production of ecofriendly PUR materials [9][10][11]. Various sources of biomass were investigated for production of bio-polyols, such as corn bran [11], rice straw [12], wheat straw [12], bagasse, cotton stalks [13], wood [14], rapeseed cake, apple pomace [15] and algae [16]. Prepared bio-polyols were used to obtain bio-PUR, with properties often comparable to materials obtained from petroleum-based polyols [17][18][19].…”

Acid Liquefaction of Potato (Solanum tuberosum) and Sweet Potato (Ipomoea batatas) Cultivars Peels – Pre-Screening of Antioxidant Activity/Total Phenolic and Sugar Contents

“…The liquefaction of biomass, such as lignocellulosic residues (residues containing cellulose and lignin), is a process that has been widely investigated, and is used in the depolymerization and solubilization of biomass at moderate temperatures (120 °C to 180 C) in polyhydric alcohols, which usually resorts to acid catalysts (Balat 2008;Jasiukaityte et al 2009;Jasiukaitytė-Grojzdek et al 2012;Kunaver et al 2012;Briones et al 2012;Hu and Li 2014;Hu et al 2014).…”

Processing, Valorization and Application of Bio-Waste Derived Compounds from Potato, Tomato, Olive and Cereals: A Review

“…Liquefaction was performed using phenol (71 % wt) and sulfuric acid (6 % wt) at 170 • C for 2 h. The products were intended for use as raw material for phenol-formaldehyde resins. Similar, Briones, Serrano and Labidi [55] conducted a mild liquefaction of olive stones with polyhydric alcohols to obtain biopolyols. Liquefaction treatment of olive husks was also reported [349][350][351], whereas studies concerning the liquefaction of olive pomace are rather scarce [352].…”

“…By this means a liquefied product can be obtained which can be used to recover chemicals from vegetable origin. Possible applications of produced ethanol are biofuel or biopolyols [55]. Another possible liquefaction technology is the hydrothermal liquefaction in subcritical water.…”