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

Research Papers Faculty of Materials Science and Technology Slovak University of Technology Pub Date : 2019-06-01 DOI:10.2478/rput-2019-0016

Igor Wachter, Tomáš Štefko, Marek Rolinec

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引用次数: 2

Abstract

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.

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椴木两步法碱法脱除木质素工艺的优化

摘要以不同厚度的椴木(tila Cordata)为原料，研究了碱硫脱除木质素的工艺条件。木质素的去除是在连续的几个步骤中进行的，其中研究了单个参数的影响(NaOH + Na2SO3, KOH + Na2SO3溶液，其浓度，浸出时间，增白剂的效果，单个浴之间的样品洗涤效果等)。通过实验发现，实验过程中新鲜NaOH + Na2SO3溶液的变化没有明显的影响。相比之下，跳过氢氧化物浴后的沸腾蒸馏水洗涤，对下一步H2O2脱除木质素的速度和效率有显著影响。通过对比NaOH + Na2SO3和KOH + Na2SO3溶液对木质素的去除率，发现KOH + Na2SO3溶液对木质素的去除率更高。上述方法的应用有助于简化实椴木脱除木质素的过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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

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