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No.8 (1961/6) >

 
Title :アルコール性硝酸法によるハイキビより パルプの実験的製造
Title alternative :Manufacturing pulp from Panicum repens L.with alcoholic nitric acid in laboratory.
Authors :外間, 宏一
Authors alternative :Hokama, Koichi
Issue Date :Jun-1961
Abstract :(1)試料に用いられたハイキビは琉球大学松川分室機内で採取し、実験に際しては葉部を除去して、茎部を上、中、下の3部分に分けて実施し、製造用試料は細断し、分析用試料は粉砕した。(2)原料分析結果から注目すべきことはハイキビのペントザン含有率が平均22%もある事であり、殊に上部分が最も多い。尚中部分は全-セルロースにおいて、下部分はリグニンにおいて、その含有率が最も高い事は製品分析結果と一致している。(3)製造方法は、Aronovsky,Lunchの報告になるアルコール性硝酸法に準じ、酸蒸解液濃度は3様(2%、2.5%、3.1%)にとり、アルカリ蒸解液濃度は一律に2%にした。また蒸解時間も酸、アルカリ共に1時間にした。(4)蒸解液の濃度が高ければ収量およびリグニン含量は減少し、a-セルロース含量は増大した。(5)酸蒸解液濃度は2.5~3%が最適のように思われる。
(1) Samples tested for Panicun repens L. were collected from Matsugawa Branch Research Station located in Naha. After removing all leaves of samples, the stems were divided into three parts, upper, middle, and lower, and they were pulverized for analysis and shreded for manufacturing. (2) Judging from the analytical results of raw materials, it is worth notice that the content of pentosan occupied in Panicum repens L. was as much as 22% in average, above all, most in upper part. The results obtained from finished pulp can be condensed as follows: The middle part of raw materials in most abundant in total cellulose and the lower part in lignin. (3) Manufacturing process was carried out in according to alcoholic nitric acid method which had been reported by Aronovsky and Lynch. In the concentration of acid cooking solution, three cases of 2%, 2.5% and 3.1% HNO_3 were respectively adopted, and in that of alkali cooking solution, 2% NaOH was used and cooking treatment for both acid and alkali was carried out for an hour. (4) With increase of the concentration of cooking solution, the yield of pulp and content of lignin decreased, whereas that of a-cellulose increased. (5) Concentration of acid cooking solution between 2. 5% and 3.1% HNO_3 is appeared to be most suitable.
Type Local :紀要論文
ISSN :0485-7828
Publisher :琉球大学農家政工学部
URI :http://hdl.handle.net/20.500.12000/23273
Citation :琉球大学農家政工学部学術報告 = The science bulletin of the Division of Agriculture, Home Economics & Engineering, University of the Ryukyus no.8 p.169 -174
Appears in Collections:No.8 (1961/6)

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