Artículos de revistas
Organosolv Pulping - V: Formic Acid Delignification Of Eucalyptus Globulus And Eucalyptus Grandis
Registro en:
Bioresource Technology. , v. 37, n. 1, p. 1 - 6, 1991.
9608524
10.1016/0960-8524(91)90105-S
2-s2.0-0025813406
Autor
Baeza J.
Urizar S.
de Magalhaes Erismann N.
Freer J.
Schmidt E.
Duran N.
Institución
Resumen
Organosolv pulping mediated by formic acid was evaluated. Wood of Eucalyptus globulus and Eucalyptus grandis was cooked with formic acid under different conditions of solvent ratio (formic acid: water), catalyst concentration, temperature and time of treatment. For E. globulus, the best results for sawdust samples were obtained at 90°C after 90 min of cooking, with a solvent ratio of 80:20 (vv-1), a charge (wood:solvent ratio) of 1:30 and 0·44% (vv-1) of catalyst. In the case of E. globulus chips, the concentration of catalyst used was 0·22%, the charge was 1:10, and soaking and preheating were used. For a sample of E. globulus soaked in water for 72 h, the pulp yield was 56%, Kappa number 22 and reject content 1·6% E. grandis wood needed more drastic conditions. Cooking of E. grandis chips with formic acid (99%) at 95°C, 0·22% catalyst, charge 1:10, resulted in a pulp yield of 43%. The Kappa number was 31, reject content 0·1% and the cellulose and Klason lignin contents were 88% and 8%, respectively. © 1991. 37 1 1 6 Aziz, McDonough, Ester pulping — a brief evaluation (1987) Tappi J., 70, pp. 137-138 Aziz, Sarkenen, Organosolv pulping — a review (1989) Tappi J., 73, pp. 169-175 Baeza, Freer, Palma, Pedreros, Rodriguez, Rojas, Durán, Chemical studies on Pinus radiata D. Don (1986) Proc. Symposium of Chemistry and Renewal Resources Utilization, pp. 63-66. , Concepción, Chile Baeza, Freer, Pedreros, Durán, Mansilla, (1986) Proc. of First Brazilian Symposium in Bioorganic Chemistry, pp. 170-175. , Florianopolis, S.C., Brazil Baeza, Freer, Pedreros, Durán, Delignification of Pinus radiata D. Don wood by organic solvent (1988) Proc. XVIII Latin American Chemical Congress, pp. 513-514. , Santiago, Chile Baeza, Freer, Pedreros, Schmidt, Mansilla, Durán, Organosolv-I: Formic acid lignin from Pinus radiata D. Don (1990) Bol. Soc. Chil. Quim., 35, pp. 331-337 Baeza, J., Pedreros, A., Urizar, S., Freer, J., Schmidt, E. & Durán, N. (submitted a). Organosolv-II: Formic acid delignification of Pinus radiata D. Don. BiomassBaeza, J., Fernandez, A. M., Freer, J., Pedreros, A., Schmidt, E. & Durán, N. (submitted b). Organosolv-III: the influence of formic acid delignification on the enzymatic hydrolysis of Pinus radiata D. Don sawdust. Appl. Biochem. BiotechnolBamber, The wood anatomy of eucalypts and paper-making (1985) Appita, 38, pp. 210-216 Baumeister, Edel, Aethanol-wasser Aufschluss (1980) Papier (Darmstadt), 34, pp. V9-V18 Berzins, Micro Kappa numbers (1966) Pulp Paper Mag. Can., 67, pp. 206-208 Bland, Menshun, Determination of total lignin and polyphenol in eucalypt woods (1971) Appita, 25, pp. 110-115 Bucholtz, Jordan, Formic acid woodpulping could yield valuable chemical products (1983) Pulp Paper, 57, pp. 102-104 Erismann, Fernandez, Baeza, Freer, Mansilla, Durán, Non-pollutant wood and pulps delignification biomimetic ligninase system (1990) Biotechnology Letters, 12, pp. 305-308 Freudenberg, Janson, Knopf, Haag, (1936) Zur Kenntnis des lignins (15 Mitteil.) Ber., 69, pp. 1415-1425 Johansson, Aaltonenen, Ylinen, Organosolv pulping-methods and pulp properties (1987) Biomass, 13, pp. 45-65 Jordan, Formic acid pulping (1982) PCT Int. Patent WO 82/01902 Kleinert, v. Tayenthal, Ueber neure Versuche zur Trennung Cellulose und Inbrusten Verschiedener Holzer Z (1931) Zeitschrift für Angewandte Chemie, 44, pp. 788-791 Lora, Aziz, Organosolv pulping: a versatile approach to wood refining (1985) Tappi J., 68, pp. 94-97 Nimz, Caten, Chemical processing of lignocellulosics (1986) Holz. Roh-Werkstoff., 44, pp. 207-212 Paszner, Behera, Topochemistry of soft-wood delignification by alkali earth metal salt catalyzed organosolv pulping (1989) Holzforschung, 43, pp. 159-168 Paszner, Cho, Organosolv pulping: acidic catalysis options and their effect on fiber quality and delignification (1989) Tappi J., 73, pp. 135-142 Pedreros, Durán, Schmidt, Freer, Aguilera, Baeza, Pulping of Pinus radiata D. Don wood by organic solvent (1989) Proc. First Brazilian Symposium on Chemistry of Lignins and Other Wood Components, pp. 168-173. , R.A.M.C. de Groote, A.A.S. Curvelo, S. Carlos, S.P. Brazil Pereira, Sardinha, Chemical composition of Eucalyptus globulus Lab. (1984) Appita, 37, pp. 661-664 Wright, Hibbert, Studies on lignin and related compounds. XXVI. The properties of spruce lignin extracted with formic acid (1937) J. Am. Chem. Soc., 59, pp. 125-130