caa a22 4500 378887203 CHVBK 20180305123445.0 cr unu---uuuuu 161128e20040205xx s 000 0 eng 10.1515/HF.2004.001 doi (NATIONALLICENCE)gruyter-10.1515/HF.2004.001 Anionic effect in high concentration alcohol organosolv pulping [Elektronische Daten] [D. Yawalata, L. Paszner] Anionic effects are demonstrated with Mg-salts and free acids in high alcohol content organosolv pulping. Not all catalysts examined could effectively liberate the fibers from the wood matrix. The best result was obtained with the 0.025 M MgCl2 catalysis system, at which nearly 60% screened pulp, with viscosity of 19.9 cPs., can be produced. Mg(NO3)2 was found capable of liberating fibers, however, under the conditions set for the experiment, complete fiber liberation was not achieved. In contrast, MgSO4 and Mg(CH3COO)2 were incapable of fiber liberation in themselves. On the other hand, in acid form, HCl and H2SO4 were capable of liberating the fibers, whereas HNO3 and CH3COOH catalysts were found ineffective. Especially with H2SO4, it should be noted that this catalysis system created a very strong hydrolyzing effect that unselectively destroyed both lignin and carbohydrates, resulting in severely damaged pulp which is useless for papermaking purposes. Therefore, choosing a suitable catalyst is the key factor for producing an organosolv pulp at high yield and with good fiber quality. 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), 1-6 0018-3830 58:1<1 2004 58 hfsg https://doi.org/10.1515/HF.2004.001 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/HF.2004.001 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), 1-6 0018-3830 58:1<1 2004 58 hfsg CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter