煤的溶胀处理对药用腐植酸提取的影响研究

以气煤、肥煤、焦煤、瘦煤为样煤,进行了样煤的粉碎、有机溶剂溶胀和硝酸氧化处理,考察了处理后煤样中的药用腐植酸得率。结果表明,吡啶和N,N-二甲基吡咯烷酮是溶胀较好的溶剂;样煤粉碎后,随着粒度的减小,煤的溶胀率增加;粒度粉碎至200目的气、肥煤经吡啶溶胀和硝酸氧化后,煤样的药用腐植酸得率可达到73.0%和71.4%,而经甲醇溶胀和硝酸氧化的200目气煤药用腐植酸得率为56.4%和58.4%。实验结果表明,煤样经过溶胀和硝酸氧化处理,对药用腐植酸的提取有促进作用。

Impact of the Swelling Treatment of the Coal on the Extraction of the Medical Humic Acid

The medical humic acid was mainly extracted from coal, so the quality and yield of the humic acid was quite different as the coal sources were different. The purpose of this study was to improve the quality and yield of the medical humic acid by treating the coal with smashing, swelling and nitric acid oxidation. The results of such treatment showed that the yield of the medical humic acid from the coal sample was 73.0% and 71.4% when the gas and fat coals were swelled with the pyridine and oxidized by nitrate, while swelled by methanol the yield of the medical humic acid was only 56.4% and 58.4%. The fact indicated that treating the coal by smashing, swelling and nitric acid oxidation could improve the yield of the medical humic acid.