摘要
提出了一种简单易行的提取褐煤中腐殖酸的方法,即根据褐煤的特点利用稀硫酸和氢氧化钠溶液对腐殖酸进行溶解和提取;实验发现,提取的腐殖酸量多少与硫酸浓度、氢氧化钠浓度、浸泡时间三因素密切相关;采用正交实验法找出了最优条件。
Proposed is a simple process for extraction of humic acid from lignite,in which dilute sulfuric acid and sodium hydroxide being used for extraction in accord with the characteristics of lignite;experiments indicated that quantity of humic acid extracted closely depends on concentration of both sulfuric acid and sodium hydroxide,and retention time;optimal conditions found by orthogonal tests.
出处
《煤炭加工与综合利用》
CAS
2007年第2期29-32,共4页
Coal Processing & Comprehensive Utilization
关键词
褐煤
腐殖酸
提取
正交实验法
影响因素
lignite
humic acid
extraction
orthogonal test
influential factor
