希亜硫酸水解によるトウモロコシ穂軸よりキシロースの製造

概要

論文の詳細を見る
To find the optimum conditions for the hydrolysis of corncobs pentosan, experiments were carried out with sulfarous acid at the concentration of 0.1-0.2% at 100-160℃. Hydrolysis rates and the quality of the hydrolyzates were investigated and the following results were obtained.1. Pretosan of corncobs, as wells as that of Buna-wood (Fagus crenata Blume), was observed to consist of fraction A (hydrolyzable with ease) and fraction B(hydrolzable with difficulty). Hydrolysis rate of fraction A of corncobs was found to be almost the same magnitude as that of fraction A of Buna-wood. The maximum prentose yield and time at which it occurs was consequently calculated as a function of temperature and sulfurous acid concentration by the use of data concerning Buna-wood.2. To improve the quality of the hydrolyzate, pretreatment of corncobs with water at 140℃ for 90 minutes was preformed. By this pretreatment about 7% of the raw materials were removed and the residue was subjected to hydrolysis. This treatment decreased the amount of impuritiew such as ash and protein in the hydrolyzate and increased the yield of xylose crystals.3. Xylose crystals, 23% of raw materials, were obtained by concentrating the hydrolyzate of the pretreated corncobs without further purification treatment such as ion change. This fact is one of the principal advantages of using sulfurous acid compared with sulfuric acid.
社団法人日本生物工学会の論文
1974-09-25