希苛性ソーダによる広葉樹材からのペントサンの抽出

概要

論文の詳細を見る
The extraction of pentosan from hardwood (Shirakamba) with dilute sodium hydroxide and the viscosity of the extract are reported here. 1) A part of pentosan was extracted with ease and another part was difficult to extract. The ratio of the pentosan difficult to extract to the total pentosan in a starting material was described as the function of NaOH concentration. 2) Sodium hydroxide less than 1% in concentration had little dissolving power. In a concentration ranging from 1 to 7%, the dissolving power increased with the increase of the concentration. In another range more than 7%, the extraction power did not increase with the increase of NaOH concentration. 3) Pentosan was hardly decomposed in the extraction to an extent that the subsequent hydrolysis of the extracted material gave no pentose. 4) The extract solution containing pentosan could further dissolve pentosan from the fresh wood, even when pentosan concentration increased to 20%. 5) The pentosan dissolved was precipitated from the extract in a maximum yield at pH less than 2. 6) The viscosity of the extract was nearly independent of the concentration of NaOH, provided the concentration in the extract was more than 4%. 7) The temperature increase by 10℃ decreased the extract viscosity to the extent of 1/2,if the pentosan concentration in the extract ranged from 12.0 to 13.8%. 8) The viscosity of the extract increased remarkably, especially when the pentosan concentration exceeded the value of 10%.
社団法人日本生物工学会の論文
1968-09-25

希苛性ソーダによる広葉樹材からのペントサンの抽出

スポンサーリンク

概要

著者

関連論文

スポンサーリンク