摘要
以风化煤和褐煤为试验材料,通过酸提法和碱溶酸析法对黄腐酸提取率的对比,筛选出一种比较有价值的黄腐酸提取方法:混酸氧化提取法。其主要工艺为:风化煤或褐煤∶混酸(硫酸∶硝酸=7∶3)∶自来水=1∶0.3∶6,原料煤中首先加入混酸,搅拌均匀,在70℃条件下氧化40 min,然后加入自来水,60℃搅拌反应1 h,离心分离出黄腐酸清液。此法在黄腐酸含量较低的煤中应用较佳。
In order to screen more valuable method （mixed acid oxidation extraction） of fulvic acid extraction, the fulvic acid production rate was test with the method of acid-extraction and alkali-acid treatment using weathering coal and lignite as experimental material. The ratio of weathering coal or lignite ： mixed acid （sulfuric acid ： nitric acid is 7 ： 3） ： running water was 1 ： 0.3 ： 6. Adding mixed acid in raw coal first for 40 minutes at 70 ℃ , then running water was added to stir reaction for 1 h at 60 ℃. Finally, was separated out. This method was better for the coal of low fulvic acid contents and stiring fulvic acid to oxidized supernatant
作者
李秀颖
叶华
刘变变
王亚龙
杭波
Li Xiuying Ye Hua Liu Bianbian Wang Yalong Hang Bo(Medical Technology Department, Xi＇an Medical College, Xi＇an, 710309 Shanxi Pucheng Mei＇erguo Agrochemical Co. Ltd., Weinan, 715511)
出处
《腐植酸》
2016年第5期24-27,共4页
Humic Acid
关键词
风化煤
褐煤
腐植酸
黄腐酸
weathered coal
lignite
humic acid
fulvic acid
