<abstract xmlns="http://www.w3.org/1999/xhtml">The aim of the research described in this article was to optimize the basic sulphur process of lignin removal from the raw radially cut basswood (Tilia Cordata) pieces of various thicknesses. Lignin removal took place chemically in several consecutive steps in which the influence of individual parameters was investigated (solutions of NaOH + Na2SO3, KOH + Na2SO3, its concentrations, time of leaching, efficacy of whitening agents, effect of sample washing between individual baths, etc.). Through experiments, it was found that the change of fresh NaOH + Na2SO3 solution during the experiment had no significant effect. In contrast, skipping the washing of the samples with boiling distilled water after the hydroxide bath had a significant effect on the rate and efficiency of lignin removal with H2O2 in the following step. When comparing the lignin removal efficiency of NaOH + Na2SO3 and KOH + Na2SO3, the delignification process was clearly demonstrated to be more effective using the KOH + Na2SO3 solution. Application of the above-mentioned procedures has helped to streamline the lignin removal process from solid basswood.</abstract>

The aim of the research described in this article was to optimize the basic sulphur process of lignin removal from the raw radially cut basswood (Tilia Cordata) pieces of various thicknesses. Lignin removal took place chemically in several consecutive steps in which the influence of individual parameters was investigated (solutions of NaOH + Na2SO3, KOH + Na2SO3, its concentrations, time of leaching, efficacy of whitening agents, effect of sample washing between individual baths, etc.). Through experiments, it was found that the change of fresh NaOH + Na2SO3 solution during the experiment had no significant effect. In contrast, skipping the washing of the samples with boiling distilled water after the hydroxide bath had a significant effect on the rate and efficiency of lignin removal with H2O2 in the following step. When comparing the lignin removal efficiency of NaOH + Na2SO3 and KOH + Na2SO3, the delignification process was clearly demonstrated to be more effective using the KOH + Na2SO3 solution. Application of the above-mentioned procedures has helped to streamline the lignin removal process from solid basswood.

Optimization of Two-Step Alkali Process of Lignin Removal from Basswood

Slovak University of Technology in Bratislava

Faculty of Materials Science and Technology in Trnava, Institute of Integrated Safety

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Optimization of Two-Step Alkali Process of Lignin Removal from Basswood"}

The aim of the research described in this article was to optimize the basic sulphur process of lignin removal from the raw radially cut basswood (Tilia...

Optimization of Two-Step Alkali Process of Lignin Removal from Basswood

Published Online: Sep 03, 2019

Page range: 153 - 161

Received: May 17, 2019

Accepted: Jun 14, 2019

DOI: https://doi.org/10.2478/rput-2019-0016

Keywords
Cellulose, basswood, lignin removal, optimization, transparent wood

© 2019 Igor Wachter et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Optimization of Two-Step Alkali Process of Lignin Removal from Basswood

Published Online: Sep 03, 2019

Page range: 153 - 161

Received: May 17, 2019

Accepted: Jun 14, 2019

DOI: https://doi.org/10.2478/rput-2019-0016

KeywordsCellulose, basswood, lignin removal, optimization, transparent wood

© 2019 Igor Wachter et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Cellulose, basswood, lignin removal, optimization, transparent wood