亜炭の化学的利用に関する研究第1報亜炭の硝酸及び硫酸処理について

概要

論文の詳細を見る
Recently, increasing interest has been shown in the use of lignite as raw material for the production of many useful chemical compounds. Among others humic acid and related compounds are now finding application in such diverse fields as mining, agriculture, ceramics and others.　In this investigation, favorable conditions for the preparation of humic acid and related compounds from lignite were studied, and in order to determine whether or not these compounds are suitable dispersing agents for the circulation mud in oil-well drilling, their effects on the viscosity of a clay suspension were examined. It was found that when treated with an excess of diluted nitric acid (10%) at 70℃ for 4 hours or with fuming sulfuric acid at 100-130℃., lignite gave alkali-soluble compounds, the so-called ”humic acids”, in considerable yield in either case, and that these compounds were very effective in lowering the viscosity of a clay suspension, and hence would be applicable to the above purpose. It is noteworthy that the compounds obtained by treating with fuming sulfuric acid are able to reduce the viscosity to the same extent as those obtained by treating with nitric acid.
山形大学の論文
1959-02-28