西安工程大学学报2016，Vol.30Issue(5)：583-589,7.DOI:10.13338/j.issn.1674-649x.2016.05.007
陕西黄陵风化煤中腐植酸的提取工艺
The humic acid extraction process of Huangling weathered coal in Shaanxi province
摘要
Abstract
In order to study the effect of different humic acid extraction process on the extrac-tion rate,the Huangling weathered coal in Shaanxi province is taken as the raw material.The hydrochloric acid is first used to activate weathered coal.Then the humic acid is extracted from the weathering coal through the three methods of alkali soluble acid,oxygen and catalytic methods to determine the optimum extraction process respectively.The results indicate that the free humic acid of weathered coal is increased after hydrochloric acid activation and the ex-traction rate of humic acid is increased.The activation efficiency is the best when the 1 8% hy-drochloric acid concentration and 25min activation.The optimum process condition of highest extraction rate by acid soluble alkali chromatography method is 1 8% of hydrochloric acid, 25min boiling time,0.8 mol/L NaOH concentration,1∶12 ratio of solid to liquid,60 min boiling water bath.The optimum process condition of oxygen method is 22% hydrogen perox-ide,0.5 mol/L alkali solution,1∶8 ratio and 30 min boiling water bath time.The optimum process condition of catalytic method is using NHPI catalyst,0.3 mol/L NaOH,1∶10 ratio and 30 min boiling water bath time.The E4/E6 value of catalytic method is smallest and the catalytic method can be used to extract the humic acid later.关键词
风化煤/盐酸活化/腐植酸Key words
weathered coal/hydrochloric acid activation/humic acid分类
资源环境引用本文复制引用
马畅柠,郭雅妮,惠璠,王理明,邵瑞华..陕西黄陵风化煤中腐植酸的提取工艺[J].西安工程大学学报,2016,30(5):583-589,7.基金项目
陕西省科技厅工业科技攻关项目(2015GY168) （2015GY168）
