亜炭の化学的利用に関する研究(第3報)主として亜炭フミン酸の製造について

概要

論文の詳細を見る
For the purpose of preparation of humic acids from lignite, the oxidations of lignite with diluted nitric acid and with air or other oxidizing agents in alkaline media were studied. The alkaline oxidations were carried out using the suspension of lignite powder in aqueous alkaline solution (the wet process) or the powder moistened with a small amount of the alkaline solution (the semi-dry process). The experimental results provided the following information :　(1) The action of nitric acid on lignite was accelerated by addition of sulfuric acid.　(2) In the wet process, the yield of humic acids was affected by nature or concentration of alkali, reaction temperature and agitation rate.　(3) The semi-dry process was superior to the wet process in the yield of humic acids, the amount of alkali and the reaction time.　(4) Humic acids obtained in these alkali processes were able to reduce the viscosity of a clay suspension to the same extent as those obtained by treating with nitric acid.
山形大学の論文
1964-12-25