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Bioresour Technol. 2012 Dec;126:64-70. doi: 10.1016/j.biortech.2012.09.051. Epub 2012 Sep 24.

Biorefinery process for production of paper and oligomers from Leucaena leucocephala K360 with or without prior autohydrolysis.

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  • 1Chemical 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

Abstract

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.

Copyright © 2012 Elsevier Ltd. All rights reserved.

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