Exploració per tema "Bleaching"
Ara es mostren els items 1-10 de 10
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An approach to industrial application: influence of black liquor and pH on xylanase efficiency in bleaching of eucalyptus kraft pulp
(American Chemical Society (ACS), 2010-11-17)
Article
Accés restringit per política de l'editorialTo obtain a more realistic appraisal of the potential efficiency of xylanases in the industrial bleaching, the influence of pH and the presence of black liquor (measured as COD) on the bleaching efficiency of two commercial ... -
An enzyme-catalysed bleaching treatment to meet dissolving pulp characteristics for cellulose derivatives applications
(2013-11)
Article
Accés restringit per política de l'editorialBleached cellulose with good end-properties (_90% ISO brightness and 62% cellulose preservation) was obtained by using a totally chlorine-free biobleaching process (TCF). Unbleached sulphite cellulose was treated with ... -
Assessing the use of xylanase and laccases in biobleaching stages of a TCF sequence for flax pulp
(2011-12)
Article
Accés restringit per política de l'editorial -
Biobleaching of high quality pulps with laccase mediator system: influence of treatment time and oxygen supply
(Elsevier, 2009)
Article
Accés obertIn this study we examined the influence of the treatment time and addition of oxygen on the efficiency of a laccase mediator system (L) applied to flax pulp at atmospheric pressure. The redox potential and the dissolved ... -
Cottonbleach: Tratamiento enzimático y con ultrasonidos para el blanqueo del algodón, una tecnología respetuosa con el medio ambiente
(Universitat Politècnica de Catalunya, 2014-06)
Projecte/Treball Final de Carrera
Accés restringit per decisió de l'autorEl presente Proyecto Final de Carrera es una parte del proyecto europeo Cottonbleach, realizado en el Centre de Recerca i Innovació de Catalunya. El objetivo principal del PFC es poner a punto, en una planta piloto, un ... -
Effect of process parameters in laccase mediator system delignification of flax pulp. Part II: Impact on effluents properties
(2009)
Article
Accés obertFlax pulp was bleached by using an enzyme treatment with laccase (L stage) in the presence of HBT as mediator in order to replace chlorine-based pulp bleaching processes which produce toxic organochlorine compounds with ... -
Estudi per la modificació funcional de biofilms de nanocel·lulosa mitjançant ozó
(Universitat Politècnica de Catalunya, 2020-01-15)
Treball Final de Grau
Accés obertEl siguiente estudio tiene como principal objetivo oxidar la nanocelulosa fibrilar (NFC) mediante ozono con el fin de obtener un biofilm con propiedades funcionales avanzadas. En primer lugar, se aplica varias veces el ... -
Estudio de la obtención de celulosa mediante ozono y métodos biotecnológicos
(Universitat Politècnica de Catalunya, 2017-01)
Treball Final de Grau
Accés restringit per decisió de l'autorLa materia prima utilizada es eucalipto (Eucalyptus globulus). Se utiliza las astillas de eucalipto y por medio de procesos como la Autohidrólisis y la cocción Kraft seguidamente de procesos de blanqueo como el blanqueo ... -
Facilitating the selection of raw materials: evaluation of the effects of TCF and ECF bleaching sequences on different wood and non-wood pulps
(2018-06)
Article
Accés obertProperties of cellulosic raw materials are known to vary widely among different sources. The interest in the usage of non-conventional fibers makes necessary a better knowledge of the peculiarities of each source and their ... -
Xylanase- and laccase-aided hexenuronic acids and lignin removal from specialty sisal fibres
(2011)
Article
Accés restringit per política de l'editorialThis work was conceived to investigate for the first time the effectiveness of the combined use of xylanase and laccase for the removal of hexenuronic acids (HexA) and lignin from sisal pulp fibres. To this end, xylanase ...