dc.creator | Tapia, Cristian | |
dc.creator | Hagar, Jaime Sapag | |
dc.creator | Siches, Pedro | |
dc.creator | Valenzuela, Fernando | |
dc.creator | Basualto, Carlos | |
dc.date.accessioned | 2018-12-20T15:04:09Z | |
dc.date.available | 2018-12-20T15:04:09Z | |
dc.date.created | 2018-12-20T15:04:09Z | |
dc.date.issued | 1996 | |
dc.identifier | Latin American Applied Research, Volumen 26, Issue 3-4, 2018, Pages 221-226 | |
dc.identifier | 03270793 | |
dc.identifier | http://repositorio.uchile.cl/handle/2250/157462 | |
dc.description.abstract | The etherification reaction of mechanic pulp (MP) with dimethylsulphate (DMS) in homogeneous media was studied using a 25-1 fractional factorial experimental design. In according to this model the quantity of DMS/2 g of dissolved MP and the interaction between reaction temperature and reaction time were established as reaction critical factors. The results obtained under different reaction conditions showed a low mass yield (around of 20%) and a low percentage of methoxylation (%MeO) (around of 0.5%). The reasons that could explain this low performance of reaction would be a low NaOH solubility in the mixture solvent dimethylacetamide - lithium chloride (DMAc/LiCl) which would produce a poor cellulose activation, and the heterogeneous composition of MP which contains besides cellulose, hemicelluloses and lignin, which also could react with DMS. | |
dc.language | en | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Chile | |
dc.source | Latin American Applied Research | |
dc.subject | Cellulose ether | |
dc.subject | Factorial experimental design | |
dc.subject | Homogeneous reaction | |
dc.subject | Mechanic pulp etherification | |
dc.subject | Methylcellulose | |
dc.title | Study of a procedure for the obtainment of methylcellulose from mechanic pulp in homogeneous media | |
dc.type | Artículos de revistas | |