Evaluation of Raw Materials and Processes for Nitrohumic Acid Production
In order to investigate the influence of different raw coal and acid coal ratios(mass ratio)on the oxidative degradation effect of nitric acid on the preparation of nitrohumic acid from raw coal,experimental studies are conducted on three types of raw coal,namely Dongbei lignite,Yunnan lignite,and Xinjiang weathered coal.The results show that under the same reaction conditions such as acid coal ratio,Dongbei lignite is more prone to oxidation than Yunnan lignite and Xinjiang weathered coal.After nitric acid oxidation degradation of three types of raw coal,the total humic acid and fulvic acid content are significantly increased.The use of nitric acid oxidation to degrade lignite and weathered coal to produce nitrohumic acid not only improves the utilization rate and added value of low-grade coal,but also solves the problem of scarce high-quality raw coal resources in the humic acid industry.
万方数据
维普
