Ara es mostren els items 42-61 de 72

    • Formaldehyde scavengers for cleaner production: A case study focused on the leather industry 

      Marsal Monge, Agustín; Cuadros Domènech, Sara; Ollé Otero, Lluís; Bacardit Dalmases, Anna; Manich, Albert; Font Vallès, Joaquim (2018-03-12)
      Article
      Accés obert
      Due to its carcinogenic character, the presence of formaldehyde in leather continues to be a subject of great concern. By using formaldehyde scavengers, it is possible to reduce the formaldehyde content in leather. In this ...
    • Humic acid derivatives as tanning and retanning agents 

      Bacardit Dalmases, Anna; Morera Prat, Josep Maria; Shendrik, Alexander; Jorge Sánchez, Juan; Ollé Otero, Lluís (2012-04-02)
      Article
      Accés restringit per política de l'editorial
      This study examines the behaviour of three types of humic acids (natural humic acids, regenerated humic acids, and sulphited humic acids) with regard to their capacity to be used as tans and retans. The study makes use of ...
    • Low carbon products to design innovative leather processes. Part II: determination of the optimal physical modification of tara 

      Ollé Otero, Lluís; Casas, Concepció; Diaz, Jorge; Sorolla, Sílvia; Bacardit Dalmases, Anna (2014-01-01)
      Article
      Accés restringit per política de l'editorial
      This study considers the fruit of the tara bush as a sustainable source for tanning agents and proposes alternatives to chromium and other mineral salts and vegetable extracts. Specifically, physical modifications have ...
    • Low carbon products to design innovative leather processes. Part III: optimization of an eco-friendly formulation using tara 

      Bacardit Dalmases, Anna; Díaz Muñoz, Jorge; Casas, Concepció; Ollé Otero, Lluís (2015-09-01)
      Article
      Accés restringit per política de l'editorial
      The aim of this work was to design a new pretanning formulation by using the fruit of the Tara tree (Caesalpinia Spinosa) as the sole source of vegetable tannin. The innovative aspect of this work embodies a new-tailored ...
    • Low carbon products to design innovative leather processes. Part IV: Manufacture of automotive leather using tara 

      Ollé Otero, Lluís; Díaz, Jorge; Casas, Concepció; Bacardit Dalmases, Anna (2016-04-19)
      Article
      Accés restringit per política de l'editorial
      In three previous studies, it has been used the fruit of the tara tree (Cæsalpinia Spinosa) as a pre-tanning agent 1. This new tailored tara product will be able to facilitate the penetration of the tannin molecules ...
    • New challenges in chrome-free leathers: development of wet-bright process 

      Bacardit Dalmases, Anna; Armengol, J; van der Burgh, Stefan; Ollé Otero, Lluís (2014-04-01)
      Article
      Accés restringit per política de l'editorial
      The aim of the present work was to develop a new tanning process (wet-bright) that produces perfectly white leather meeting all of the requirements for many kinds of articles, such as automotive, garment and shoe upper. ...
    • Nuevas aplicaciones de la cromatografía iónica en el sector de curtidos 

      Perez Quiñones, Carmen; Bacardit Dalmases, Anna; Ollé Otero, Lluís; Reyes Ferrera, Mª Reyes; Font Vallès, Joaquim (2012)
      Text en actes de congrés
      Accés obert
      La industria de curtidos utiliza gran variedad de productos químicos en las diferentes etapas del proceso de curtición. Una parte de estos productos son absorbidos por las pieles, mientras que el resto pasan a las aguas ...
    • Nuevas soluciones en la reutilización del cromo de los baños finales del proceso de curtición 

      Casas, Concepció; Sorolla, Sílvia; Spinosi, Reno; Bacardit Dalmases, Anna (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      El proceso de producción de piel wet-blue requiere del uso de sales de cromo de distintas basicidades en función del producto final de piel que se fabrica. Se estima que el consumo en sales de cromo para procesar 1tn de ...
    • Optimización del proceso de pre-curtición mediante recursos naturales sostenibles procedentes de los residuos de la explotación forestal del pino 

      Conde, Mireia; Combalia Cendra, Felip; Ollé Otero, Lluís; Bacardit Dalmases, Anna (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      La corteza de pino se utilizó como material curtiente hasta la mitad del siglo XX, siendo ésta sustituida por las sales de cromo ya que proporcionan mejores prestaciones al cuero. En la actualidad, los consumidores demandan ...
    • Optimization of two-low salt chrome tanning processes without float 

      Morera Prat, Josep Maria; Bacardit Dalmases, Anna; Ollé Otero, Lluís; Costa, Jose; Banaszak, S (2007-04)
      Article
      Accés restringit per política de l'editorial
      The aim of this study was to develop at pilot plant level two systems of pickle-tanning that would reduce both the amount of waste water and its content in chrome and chlorides while obtaining leathers that are commercially ...
    • Optimizing a Sustainable and Innovative Wet-White Process with Tara Tannins 

      Castell, Joan Carles; Fabregat, Cristina; Sorolla Casellas, Sílvia; Ollé Otero, Lluís; Bacardit Dalmases, Anna; Solano, D (2011-10-05)
      Article
      Accés restringit per política de l'editorial
      This study considers the fruit of the tara tree (Caesalpinia spinosa) as a sustainable source for tanning agents and proposes alternatives to the commercial mineral salts and vegetable extracts to comply with an increasing ...
    • Oxidative unhairing versus sulphide use – A critical comparison 

      Spinosi, Reno; Zamponi, Silva; Bacardit Dalmases, Anna; Berrettoni, Mario (2018-02-05)
      Article
      Accés restringit per política de l'editorial
      The conventional unhairing process is one of the most pollutant steps in the leather tanning process, which usually involves great amounts of sulphides, lime and soda ash, generating high BOD and COD values in the ...
    • Oxidative unhairing versus sulphide use. A critical comparison 

      Spinosi, Reno; Zamponi, Silvia; Ollé Otero, Lluís; Bacardit Dalmases, Anna (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The conventional unhairing process is one of the most pollutant steps in the leather tanning process, which usually involves great amounts of sulfides lime and soda ash, generating higher BOD and COD values in the wastewater. ...
    • Polysilane cross-linked binders for aqueous finishing 

      Ollé Otero, Lluís; Shendryck, Alexander; Combalia Cendra, Felip; Jorge Sánchez, Juan; Bacardit Dalmases, Anna (2010-06-17)
      Article
      Accés restringit per política de l'editorial
      This study explores the cross-linking reaction between an epoxy functional alkoxysilane and both the leather industry, it can be used in finishing processes. A comparison of results indicates that such cross-linker presents ...
    • Recuperación del tanino procedente de los residuos de la explotación forestal del pino 

      Combalia Cendra, Felip; Conde, Mireia; Ollé Otero, Lluís; Bacardit Dalmases, Anna (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      El objetivo principal de este trabajo es introducir de nuevo el extracto vegetal procedente de los residuos de la explotación forestal del pino como fuente de taninos que actuando como agente curtiente y recurtiente, ...
    • Reducción en la utilización de compuestos orgánicos volátiles en la industria del curtido 

      Solà, Anna; Cuadros Domènech, Rosa Maria; Ollé Otero, Lluís; Bacardit Dalmases, Anna (2014)
      Text en actes de congrés
      Accés obert
      La curtición es una actividad industrial de larga tradición en Catalunya, que desde unos inicios totalmente artesanales ha ido evolucionando progresivamente. El proceso de curtido se basa en realizar sobre la piel en bruto ...
    • Reducing the use of volatile organic compounds in the leather industry 

      Cuadros Domènech, Rosa Maria; Solà, Anna; Ollé Otero, Lluís; Bacardit Dalmases, Anna (2016-02-22)
      Article
      Accés restringit per política de l'editorial
      The tanning industry uses some pollutant chemicals, which are hazardous and toxic. This paper proposes a modest research contribution to examine how to reduce or replace some of these products by less dangerous and less ...
    • Study of cross-linking reactions of epoxy compounds 

      Bacardit Dalmases, Anna; Shendrik, Alexander; Combalia Cendra, Felip; Jorge Sánchez, Juan; Ollé Otero, Lluís (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Nowadays, the leather industry needs to produce a very wide range of finished articles with different levels of performance to increase their competitiveness while minimizing their environmental impact. To reduce the ...
    • Study of cross-linking reactions of polysilanes 

      Shendrik, Alexander; Bacardit Dalmases, Anna; Ollé Otero, Lluís (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Nowadays, there are four types of commercially available cross-linkers for the leather industry: polyaziridines, polyisocyanates, polycarbodiimides and epoxy compounds. All these products present different chemical reactivity ...
    • Study of cross-linking reactions on butadiene binders in aqueous finishing 

      Bacardit Dalmases, Anna; Shendrik, Alexander; Combalia Cendra, Felip; Jorge Sánchez, Juan; Ollé Otero, Lluís (2010-12-14)
      Article
      Accés restringit per política de l'editorial
      Butadienes, like acrylic binders and polyurethanes, can be cross-linked to improve their wet fastness properties. Nowadays, four types of cross-linkers for leather finishing are available: polyaziridines,polyisocyanates, ...