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島根農科大学研究報告 14 巻
1965-12-31 発行
酸リグニンの低濃度アルカリ溶液による可溶化
Effect of the dilute alkaline solution on the strong acid lignin
福渡 七郎
雑賀 宏昌
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The solubility of the acid lignins polymerized by strong acids are very low. On the other hand, according to the results of these experiments, a part or major part of the technical acid lignins are able to be maked soluble to the dilute alkaline aqueous solution of the concentrations under 6 %, when treated at 165-160℃, 2 hours.
From the solutions of the lignins are fractionated α-, β-, and γ-fractions by neutralization with dilute sulfuric acid (pH. 3), and the yields of these fractions are obtained about 50%, 25%, and 25% respectively by treatments under the given conditions.
However, some problems about the behaviours of the other acid lignins preparated by different processes will be discussed at following studies.
From the solutions of the lignins are fractionated α-, β-, and γ-fractions by neutralization with dilute sulfuric acid (pH. 3), and the yields of these fractions are obtained about 50%, 25%, and 25% respectively by treatments under the given conditions.
However, some problems about the behaviours of the other acid lignins preparated by different processes will be discussed at following studies.
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