CAJ | 학술논문

对云南金所年青褐煤进行H_2O_2 降解制备黄腐酸的试验研究,通过透析将黄腐酸分为相对分子质量不同的7个级分,对其进行元素分析、红外光谱等研究.结果表明:对黄腐酸产率影响最大的因素是煤与氧化剂质量比,其次是氧化降解时间,氧化剂质量分数影响最小.优化工艺:煤与H_2O_2 质量比1:0.38,氧化降解温度30℃,氧化降解时间180 min,H_2O_2质量分数为15%,在此条件下黄腐酸产率达19%.理化分析结果表明:降解产物黄腐酸中总酸性基团、羧基质量摩尔浓度显著提高;随着相对分子质量的增加,氧元素和含氧官能团减少.
대운남금소년청갈매진행H_2O_2 강해제비황부산적시험연구,통과투석장황부산분위상대분자질량불동적7개급분,대기진행원소분석、홍외광보등연구.결과표명:대황부산산솔영향최대적인소시매여양화제질량비,기차시양화강해시간,양화제질량분수영향최소.우화공예:매여H_2O_2 질량비1:0.38,양화강해온도30℃,양화강해시간180 min,H_2O_2질량분수위15%,재차조건하황부산산솔체19%.이화분석결과표명:강해산물황부산중총산성기단、최기질량마이농도현저제고;수착상대분자질량적증가,양원소화함양관능단감소.
The experimental investigation of Yunnan Jinsuo brown coal oxidized with H_2O_2 solution for preparing fulvic acids was carried out in laboratory. The products were fractionated into seven fractions based on different relative molecular mass by dialysis, and each fraction was characterized by elemental analyzer, IR spectrometry, etc. The results show that the mass ratio of coal to oxidant is the first effect on the yield remarkably, and the second is the oxidization duration, and the oxidant mass fraction has no obvious effect. The optimum process conditions are as follows; mass ratio of coal to oxidant 1 : 0. 38, oxidization temperature 30 ℃ , oxidization duration 180 min, H_2O_2 mass fraction 15%. Under such conditions, the yield of fulvic acids is up to 19% . The analysis of component properties indicates that the content of carboxyl and total acidic group in the product are obviously improved; with the increasing of the relative molecular mass, the oxygen and oxygen-containing functional groups decrease.