caa a22 4500 378887343 CHVBK 20180305123446.0 cr unu---uuuuu 161128e20040205xx s 000 0 eng 10.1515/HF.2004.002 doi (NATIONALLICENCE)gruyter-10.1515/HF.2004.002 Cationic effect in high concentration alcohol organosolv pulping: The next generation biorefinery [Elektronische Daten] [D. Yawalata, L. Paszner] Catalyst employment in cooking liquor of 80% aqueous methanol is required for fiber liberation at high yield (50%) and has a remarkable impact on pulp production capability in the alcohol organosolv pulping of spruce wood. In alcohol solution without a suitable catalyst, the softwood fibers cannot be effectively liberated from the wood matrix. The effectiveness of the catalysts tested in this research varied widely. Divalent metal ions were found to be very effective, whereas monovalent cations were incapable of fiber liberation and trivalent cations were found to be too aggressive and hydrolyzed the carbohydrates, causing extensive damage to the fibers. Under the specified pulping conditions, the divalent metal ion catalyzed alcohol organosolv pulping process was capable of producing 60-61% screened pulp. Successful chemical pulp production by the NAEM (Neutral Alkali Earth Metal) catalyzed organosolv pulping process opens access to biorefining and provides value recovery both from the pulp and also from the dissolved wood components from the spent pulping liquor. Copyright © 2004 by Walter de Gruyter GmbH & Co. KG Timber & wood processing nationallicence Biotechnology nationallicence Materials science nationallicence Yawalata D. aut Paszner L. aut Holzforschung Walter de Gruyter 58/1(2004-02-05), 7-13 0018-3830 58:1<7 2004 58 hfsg https://doi.org/10.1515/HF.2004.002 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/HF.2004.002 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yawalata D. aut NATIONALLICENCE 700 1- Paszner L. aut NATIONALLICENCE 773 0- Holzforschung Walter de Gruyter 58/1(2004-02-05), 7-13 0018-3830 58:1<7 2004 58 hfsg CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter