Biorefinery process for production of paper and oligomers from Leucaena leucocephala K360 with or without prior autohydrolysis.
Lignocellulosic material from Leucaena leucocephala was subjected to a two-stage fractionation process to obtain a valorized effluent containing hemicellulose derivatives and a solid phase for producing cellulose pulp by conventional soda-anthraquinone delignification. This solid phase allows the production of cellulose pulp, under less rigorous conditions from NaOH-AQ process (177 °C, 21%, 120 min) than without pretreatment delignification (185 °C, 25%, 150 min) and better or similar properties in the paper sheets obtained (yield 27.6 and 34.0%, brightness 39.3 and 31.6% ISO, tensile index 7.8 and 10.5 N m/g, burst index 0.43 and 0.29 MPa m(2)/kg with and without previous autohydrolysis) have be found. Also, the first autohydrolysis stage allows up to 46.6% of the initial hemicellulose in the raw material to be extracted as xylooligomers, xylose and furfural into the liquid phase.
Chemical Engineering Department, Faculty of Experimental Sciences, Center for Research in Products Technology and Chemical Process, Pro2TecS, University of Huelva, Av. 3 de Marzo S/N, 21071 Huelva, Spain. manuel.feria@diq.uhu.es
M J
MJ
Feria
J C
JC
García
M J
MJ
Díaz
M
M
Fernández
F
F
López
D000880:Anthraquinones / Q000737:chemistry; D001709:Biotechnology / Q000379:methods*; D007887:Fabaceae / Q000737:chemistry*; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D010209:Paper; D012972:Sodium Hydroxide / Q000737:chemistry
D000880:Anthraquinones; C036909:lignocellulose; D012972:Sodium Hydroxide; D008031:Lignin